/ spring wire GOST 9389-75 65G for the manufacture of springs
Spring wire GOST 9389-75 used for the manufacture of cold-wound springs that are not subject to hardening.
Our assortment includes: patented piano steel spring wire GOST 9389-75 1st and 2nd accuracy classes, groups A, B, B, steel grade 65G TU 14-4-386-73.
Wire GOST 9389 spring steel carbon is subdivided:
by mechanical properties: grades B and B, classes 2 and 3, by manufacturing accuracy: normal and increased accuracy.
The surface should be free of cracks, caps, sunsets, hairs and rust.
Technical characteristics of spring wire GOST 9389-75 steel 65G
| Wire diameter, mm | Tensile strength, N/mm2 (kgf/mm2) | Run-up in the party. kgf/mm2 no more | ||||||
|---|---|---|---|---|---|---|---|---|
| Class | Grade A | Brand B | Brand B | |||||
| 1 | 2 | 3 | 1 | 1,2,3 | 1 | 2 | 3 | |
| Wire class | ||||||||
| 0.50 | 265-300 | 220-265 | 170-220 | 23 | 27 | - | - | - |
| 0.60 | 265-300 | 220-265 | 170-220 | 21 | 24 | - | - | - |
| 0.63 | 260-295 | 220-260 | 170-220 | 20 | - | - | 40 | - |
| 0.70 | 260-295 | 220-260 | 170-220 | 19 | - | 35 | - | - |
| 0.80 | 260-295 | 215-260 | 170-215 | 18 | 23 | 30 | 45 | 45 |
| 0.90 | 255-285 | 215-255 | 165-205 | 17 | 23 | - | 40 | 50 |
| 1.0 | 250-280 | 210-250 | 160-210 | 16 | 22 | - | - | - |
| 1.2 | 240-270 | 200-240 | 155-200 | 15 | 21 | 30 | - | 45 |
| 1.4 | 230-260 | 195-230 | 150-195 | 15 | 20 | - | 35 | 45 |
| 1.6 | 220-250 | 190-220 | 145-190 | 15 | 20 | 25 | 30 | 45 |
| 2.2 | 195-220 | 170-195 | 135-170 | 15 | - | - | 25 | 35 |
| 2.5 | 185-210 | 165-190 | 130-165 | 15 | - | - | - | - |
| 2.8 | 180-205 | 165-190 | 130-165 | 15 | - | - | - | - |
| 3.0 | 175-200 | 165-190 | 130-165 | 15 | - | - | - | - |
| 3.6 | 170-195 | 180-155 | 125-155 | 15 | - | - | - | 30 |
| 4.0 | 165-190 | 150-175 | 120-150 | 15 | - | - | - | - |
| 8.0 | - | 125-145 | 105-125 | - | - | - | - | - |
Winding is carried out without entangling the turns and ensures free winding of wire from spools and skeins. When releasing the skein from the ties, the wire should not curl into a figure eight.
A skein consists of one piece of wire. No more than three pieces of wire are allowed on a reel or coil weighing more than 250 kg. Instead of marking the separation points, it is allowed to draw out and secure the ends of the segments on the cheek of the reel.
| Wire diameter, mm | Number of wire twists, not less | |||||
|---|---|---|---|---|---|---|
| Brand A, B | Brand B | |||||
| 1 | 2 | 3 | 1 | 2 | 3 | |
| Class | ||||||
| 0.50 | - | - | 20 | 16 | 19 | 19 |
| 0.60 | - | - | - | - | 18 | 18 |
| 0.63 | - | - | - | - | - | - |
| 0.70 | - | - | - | - | - | - |
| 0.80 | - | - | 20 | 16 | 17 | 17 |
| 0.90 | - | - | - | - | - | - |
| 1.0 | - | - | - | - | - | - |
| 1.2 | - | - | - | - | - | - |
| 1.4 | 20 | 20 | 20 | 16 | 17 | 17 |
| 1.6 | - | - | - | - | - | - |
| 2.2 | 15 | 15 | 15 | 13 | 15 | 15 |
| 2.5 | - | - | - | 12 | - | - |
| 2.8 | - | - | - | 11 | 14 | 14 |
| 3.0 | - | - | - | 10 | 13 | 13 |
| 3.6 | - | - | - | 7 | 13 | 13 |
| 4.0 | - | 13 | 13 | - | - | - |
| 8.0 | - | - | - | - | - | - |
Notes:
1. At the request of the consumer, the supply of wire of intermediate diameters is allowed. In this case, the maximum deviations in diameter must correspond to those established for the nearest larger diameter.
2. The ovality of the wire should not exceed half of the diameter tolerance range.
Examples of symbols:
GOST 9389 spring wire, grade A, class 1, increased accuracy, diameter 1.60 mm:
Wire A-1-P-1.6 GOST 9389-75
Spring wire, grade B, class 3, normal accuracy, diameter 2.0 mm:
Wire B-3-2 GOST 9389-75
Spring wire grade B, class 2A, increased precision, diameter 1.20 mm:
Wire B-2A-1.2 GOST 9389-75
Spring wire 65G is intended for the manufacture of springs; it is wound in a cold state and subjected to hardening.
Spring wire is made of steel grade: 65G or 65-75 according to GOST 14959-79.
At the request of the furniture industry, spring wire 65G with a diameter of 2.2 mm, increased precision, grade B, is manufactured with a tensile strength of 1570-1770 N/mm2 (160-180 kgf/mm2).
The relative strength run-up is calculated using the formula:
K = Δσ in / σ in
Where:
Δσ in - run-up of temporary tensile strength in the batch, N/mm 2;
| Theoretical weight of 1000 m of spring wire: | Nom. wire diameter, mm | Wire diameter, mm | Weight 1000 m, kg Square cross section | Nom. wire diameter, mm | |
|---|---|---|---|---|---|
| 0,14 | 0,0154 | 0,1208 | 2,0 | 3,14 | 24,65 |
| 0,15 | 0,0177 | 0,1387 | 2,1 | 3,46 | 27,19 |
| 0,16 | 0,0201 | 0,1578 | 2,2 | 3,8 | 29,83 |
| 0,18 | 0,0254 | 0,1994 | 2,3 | 4,15 | 32,58 |
| 0,20 | 0,0314 | 0,2465 | 2,5 | 4,91 | 38,54 |
| 0,22 | 0,0380 | 0,298 | 2,8 | 6,16 | 48,36 |
| 0,25 | 0,0491 | 0,385 | 3,0 | 7,07 | 55,5 |
| 0,28 | 0,0616 | 0,484 | 3,2 | 8,04 | 63,11 |
| 0,30 | 0,0707 | 0,555 | 3,4 | 9,08 | 71,28 |
| 0,32 | 0,0804 | 0,631 | 3,5 | 9,62 | 75,52 |
| 0,36 | 0,1018 | 0,8 | 3,6 | 10,18 | 79,9 |
| 0,40 | 0,1257 | 0,99 | 4,0 | 12,57 | 98,7 |
| 0,45 | 0,159 | 1,25 | 4,2 | 13,85 | 108,7 |
| 0,50 | 0,196 | 1,54 | 4,5 | 15,90 | 124,8 |
| 0,56 | 0,246 | 1,93 | 5,0 | 19,63 | 154,2 |
| 0,60 | 0,283 | 2,22 | 5,6 | 24,63 | 193,3 |
| 0,63 | 0,312 | 2,45 | 6,0 | 28,3 | 221,0 |
| 0,70 | 0,385 | 3,02 | 6,3 | 31,7 | 244,4 |
| 0,75 | 0,442 | 3,47 | 6,5 | 33,2 | 260,5 |
| 0,80 | 0,503 | 3,95 | 6,7 | 35,3 | 276,8 |
| 0,85 | 0,567 | 4,45 | 7,0 | 38,5 | 302,1 |
| 0,90 | 0,636 | 4,99 | 7,5 | 44,2 | 346,8 |
| 1,0 | 0,785 | 6,17 | 8,0 | 50,3 | 394,6 |
| 1,1 | 0,950 | 7,46 | - | - | - |
| 1,2 | 1,131 | 8,88 | - | - | - |
| 1,3 | 1,327 | 10,42 | - | - | - |
| 1,4 | 1,539 | 12,08 | - | - | - |
| 1,6 | 2,01 | 15,78 | - | - | - |
| 1,7 | 2,27 | 17,82 | - | - | - |
| 1,8 | 2,54 | 19,94 | - | - | - |
| 1,9 | 2,84 | 22,26 | - | - | - |
, mm.sq.
Release form: skeins of 80-120 kg or coils weighing 500-800 kg up to 1000 kg.
TECHNICAL REQUIREMENTS Spring wire GOST 9389-75
must comply with the requirements of the standard according to technological regulations approved in the prescribed manner, made of carbon steel in accordance with GOST 1050-88, GOST 14959-79, GOST 1435-90 or according to regulatory and technical documentation, as well as from steel grades KT-2 and ZK-7 , the chemical composition of which is indicated in the table, and other special smelting steels manufactured according to regulatory and technical documentation.
In this case, class 2A wire must be made of steel with a mass fraction of sulfur not exceeding 0.030% and phosphorus not exceeding 0.035%.
Spring wire 65g GOST 9389-75 should not have cracks, films, sunsets, hairlines, shells and rust on the surface. Risks with a depth of no more than half the diameter tolerance field are allowed, as well as remnants of technological coatings applied to the surface of the wire to prepare the metal for drawing.
Wire GOST 9389-75
class 2A for the aviation industry must be without traces of technological copper plating on the surface.
Complete decarburization of the wire is not allowed. The depth of partial decarburization should not exceed 1.2-1.5% of the nominal diameter on grade A wire of class I and grade B wire.
In this case, the diameter of the cylindrical core must be equal to two wire diameters for wire from 3.0 to 6.0 mm and three wire diameters for wire over 6.0 mm.
A cylindrical core of smaller diameter is acceptable. The number of turns when winding must be at least eight.
At the request of the consumer, wire GOST 9389-75 grades A and B should not delaminate when tested for torsion.
Delamination refers to cracks running along a helix along the surface of the sample. The main break should be smooth and perpendicular to the axis of the wire.
Waviness is not allowed. Waviness is understood as a periodic change in diameter or periodic bending of the wire, which persists when a load not exceeding 0.3 of the breaking force of the wire is applied to a sample of wire with a working length of 200+0.5 mm.
Winding of wire should be done without interchanging the turns and ensure free winding of the wire from the spools and skeins.
When releasing the skein from the ties, the wire should not curl into a figure eight.
The skein should consist of one piece of wire.
No more than three pieces of wire are allowed on a reel or coil weighing more than 250 kg.
In places where the sections separate, bookmarks must be laid. Instead of marking the separation points, it is allowed to draw out and secure the ends of the segments on the cheek of the reel.
Tying the ends of wire sections is not allowed.
Each skein must be firmly tied with soft wire according to regulatory and technical documentation in at least three places evenly spaced around the circumference.
Rolls of wire with a diameter of 0.60 mm or less can be tied with the end of a wound wire or twine in accordance with GOST 17308-88 or other regulatory and technical documentation. Skeins of the same class, group and diameter can be knitted into coils. The end of the upper piece of wire on the reel should be secured to the cheek of the reel.
Hanks, coils of wire with a diameter of 0.20 mm or more must be wrapped in a layer of paper, then in a layer of polymer film or non-woven materials, or fabric made of chemical fibers.
When mechanized packaging, coils of wire must be wrapped in a layer of cable crepe paper in accordance with GOST 10396-84 or KMV-170 grade paper, or other crepe paper with equivalent protective properties, or polymer film with the packaging secured with wire in accordance with GOST 3282-74 or other wire.
By agreement between the manufacturer and the consumer, the wire may not be packaged or lubricated.
The weight of one piece of cargo must be no more than 1500 kg.
Used as a semi-finished product for the manufacture of highly loaded and heavily loaded springs with increased requirements for wear resistance.
The material for the manufacture of spring wire must combine the necessary strength, heat resistance, relaxation resistance, thereby ensuring the stability of the properties of the springs, have a given degree of corrosion resistance and be non-magnetic.
INTERSTATE STANDARD
CARBON STEEL WIRE
SPRING
Used as a semi-finished product for the manufacture of highly loaded and heavily loaded springs with increased requirements for wear resistance.
TECHNICAL CONDITIONS
IPC PUBLISHING HOUSE OF STANDARDS
Date of introduction 01/01/77 3).
This standard applies to cold-drawn carbon steel wire used for the manufacture of cold-wound springs that are not quenched.
(Changed edition, Rev. No.
1. TYPES AND MAIN DIMENSIONS
1.1. The wire is produced:
a) according to mechanical properties:
brands A, B, C,
b) in terms of manufacturing accuracy:
normal accuracy,
increased accuracy - P.
Wire of classes 1, 2, 3 is produced with normal and increased accuracy, class 2A - with increased accuracy.
|
1.2. The diameter of the wire and the maximum deviations along it must correspond to those indicated in the table. 1. |
1.2. The diameter of the wire and the maximum deviations along it must correspond to those indicated in the table. 1. |
Table 1 |
||||
|
Nominal wire diameter |
Maximum deviation for wire diameter |
Nominal wire diameter |
Maximum deviation for wire diameter |
|||
Notes:
increased accuracy
normal accuracy
1. At the request of the consumer, the supply of wire of intermediate diameters is allowed. In this case, the maximum deviations in diameter must correspond to those established for the nearest larger diameter.
2. The theoretical mass of the wire is given in Appendix 1.
1.1, 1.2. (Changed edition, Rev. 3, 4).
1.3. The ovality of the wire should not exceed half the diameter tolerance range.
Examples of symbols:
The same, brand B, class 2A, increased accuracy, diameter 1.20 mm:
2. TECHNICAL REQUIREMENTS
2.1. Steel carbon spring wire must be manufactured in accordance with the requirements of this standard according to technological regulations approved in the prescribed manner, from carbon steel in accordance with GOST 1050, GOST 14959, GOST 1435 or according to regulatory and technical documentation, as well as from steel grades KT-2 and 3K -7, the chemical composition of which is indicated in table. 2, and other special smelting steels manufactured according to regulatory and technical documentation. In this case, class 2A wire must be made of steel with a mass fraction of sulfur not exceeding 0.030% and phosphorus not exceeding 0.035%.
At the request of the consumer, the wire is made of steel of a certain grade.
table 2
|
steel grade |
||||||||
|
Manganese |
||||||||
(Changed edition, Amendment No. 2, 3).
2.2. The surface of the wire should be free of cracks, caps, dulls, hairlines, shells and rust.
Risks with a depth of no more than half the diameter tolerance field are allowed, as well as remnants of technological coatings applied to the surface of the wire to prepare the metal for drawing.
Class 2A wire for the aviation industry must be without traces of technological copper plating on the surface.
(Changed edition, Amendment No. 3).
2.3. The mechanical properties of the wire must comply with the standards specified in table. 3. The mechanical properties of wire of intermediate diameters must comply with the standards established for the nearest larger diameter (see Table 3).
2.4. Complete decarburization of the wire is not allowed.
The depth of partial decarburization should not exceed 1.5% of the nominal diameter on wire grade A, class 1 and grade B, classes 1, 2A; grade B, class 2-2.5%; grade B, class 3-3%.
2.5. At the consumer's request, wire of grades A and B should not break or crack when coiled or bent. Wire with a diameter of up to 3.0 mm must be wound around a cylindrical core equal to the diameter of the wire, and with a diameter of 3.0 mm or more must be either bent 180° or coiled.
In this case, the diameter of the cylindrical core must be equal to two wire diameters for wire from 3.0 to 6.0 mm and three wire diameters for wire over 6.0 mm. A cylindrical core of smaller diameter is acceptable.
The number of turns when winding must be at least eight.
2.4, 2.5. (Changed edition, Amendment No. 3, 4).
2.5a. At the consumer's request, wire of grades A and B should not delaminate when tested for torsion.
Delamination refers to cracks running along a helix along the surface of the sample.
The main break should be smooth and perpendicular to the axis of the wire.
2.5b. Wire waviness is not allowed.
Waviness is understood as a periodic change in diameter or periodic bending of the wire, which persists when a load not exceeding 0.3 of the breaking force of the wire is applied to a sample of wire with a working length of (200 ± 0.5) mm.
2.5a, 2.5b. (Introduced additionally, Amendment No. 3).
Table 3
|
Wire diameter, mm |
Tensile strength, N/mm 2 (kgf/mm 2) |
Range of tensile strength in a batch, N/mm 2 (kgf/mm 2), no more |
Number of twists, not less |
|||||||||||||
|
Brands A, B Brand C |
||||||||||||||||
|
Classes 2, 2A |
||||||||||||||||
|
2740 - 3090 (280 - 315) |
2300 - 2740 (235 - 280) |
1810 - 2300 (185 - 235) |
||||||||||||||
|
2740 - 3090 (280 - 315) |
2300 - 2740 (235 - 280) |
1810 - 2300 (185 - 235) |
||||||||||||||
|
2740 - 3090 (280 - 315) |
2300 - 2740 (235 - 280) |
1810 - 2300 (185 - 235) |
||||||||||||||
|
2740 - 3090 (280 - 315) |
2300 - 2740 (235 - 280) |
1810 - 2300 (185 - 235) |
||||||||||||||
|
2700 - 3040 (275 - 310) |
2260 - 2700 (230 - 275) |
1770 - 2260 (180 - 230) |
||||||||||||||
|
2700 - 3040 (275 - 310) |
2260 - 2700 (230 - 275) |
1770 - 2260 (180 - 230) |
||||||||||||||
|
2700 - 3040 (275 - 310) |
2260 - 2700 (230 - 275) |
1770 - 2260 (180 - 230) |
||||||||||||||
|
2700 - 3040 (275 - 310) |
2260 - 2700 (230 - 275) |
1770 - 2260 (180 - 230) |
||||||||||||||
|
2700 - 3040 (275 - 310) |
2260 - 2700 (230 - 275) |
1770 - 2260 (180 - 230) |
||||||||||||||
|
2650 - 2990 (270 - 305) |
2210 - 2650 (225 - 270) |
1720 - 2210 (175 - 225) |
||||||||||||||
|
2650 - 2990 (270 - 305) |
2210 - 2650 (225 - 270) |
1720 - 2210 (175 - 225) |
||||||||||||||
|
2600 - 2940 (265 - 300) |
2160 - 2600 (220 - 265) |
1670 - 2160 (170 - 220) |
||||||||||||||
|
2600 - 2940 (265 - 300) |
2160 - 2600 (220 - 265) |
1670 - 2160 (170 - 220) |
||||||||||||||
|
2600 - 2940 (265 - 300) |
2160 - 2600 (220 - 265) |
1670 - 2160 (170 - 220) |
||||||||||||||
|
2600 - 2940 (265 - 300) |
2160 - 2600 (220 - 265) |
1670 - 2160 (170 - 220) |
||||||||||||||
|
2600 - 2940 (265 - 300) |
2160 - 2600 (220 - 265) |
1670 - 2160 (170 - 220) |
||||||||||||||
|
2550 - 2890 (260 - 295) |
2160 - 2550 (220 - 260) |
1670 - 2160 (170 - 220) |
||||||||||||||
|
2550 - 2890 (260 - 295) |
2160 - 2550 (220 - 260) |
1670 - 2160 (170 - 220) |
||||||||||||||
|
2550 - 2890 (260 - 295) |
2110 - 2550 (215 - 260) |
1670 - 2110 (170 - 215) |
||||||||||||||
|
2500 - 2790 (255 - 285) |
2110 - 2500 (215 - 255) |
1620 - 2110 (165 - 215) |
||||||||||||||
|
2450 - 2740 (250 - 280) |
2060 - 2450 (210 - 250) |
1570 - 2060 (160 - 210) |
||||||||||||||
|
2400 - 2700 (245 - 275) |
2010 - 2400 (205 - 245) |
1520 - 2010 (155 - 205) |
||||||||||||||
|
2350 - 2650 (240 - 270) |
1960 - 2350 (200 - 240) |
1520 - 1960 (155 - 200) |
||||||||||||||
|
2300 - 2600 (235 - 265) |
1960 - 2300 (200 - 235) |
1520 - 1960 (155 - 200) |
||||||||||||||
|
2260 - 2550 (230 - 260) |
1910 - 2260 (195 - 230) |
1470 - 1960 (150 - 200) |
||||||||||||||
|
2210 - 2500 (225 - 255) |
1860 - 2210 (190 - 225) |
1420 - 1860 (145 - 190) |
||||||||||||||
|
2160 - 2450 (220 - 250) |
1860 - 2160 (190 - 220) |
1420 - 1860 (145 - 190) |
||||||||||||||
|
2060 - 2350 (210 - 240) |
1770 - 2060 (180 - 210) |
1370 - 1770 (140 - 180) |
||||||||||||||
|
2060 - 2350 (210 - 240) |
1770 - 2060 (180 - 210) |
1370 - 1770 (140 - 180) |
||||||||||||||
|
2010 - 2300 (205 - 235) |
1770 - 2010 (180 - 205) |
1370 - 1770 (140 - 180) |
||||||||||||||
|
2010 - 2260 (205 - 230) |
1770 - 2010 (180 - 205) |
1370 - 1770 (140 - 180) |
||||||||||||||
|
1960 - 2210 (200 - 225) |
1720 - 1960 (175 - 200) |
1370 - 1720 (140 - 175) |
||||||||||||||
|
1910 - 2160 (195 - 220) |
1670 - 1910 (170 - 195) |
1320 - 1670 (135 - 170) |
||||||||||||||
|
1910 - 2160 (195 - 220) |
1670 - 1910 (170 - 195) |
1320 - 1670 (135 - 170) |
||||||||||||||
|
1810 - 2060 (185 - 210) |
1620 - 1860 (165 - 190) |
1270 - 1620 (130 - 165) |
||||||||||||||
|
1770 - 2010 (180 - 205) |
1620 - 1860 (165 - 190) |
1270 - 1620 (130 - 165) |
||||||||||||||
|
1720 - 1960 (175 - 200) |
1620 - 1860 (165 - 190) |
1270 - 1620 (130 - 165) |
||||||||||||||
|
1720 - 1960 (175 - 200) |
1520 - 1770 (155 - 180) |
1230 - 1520 (125 - 155) |
||||||||||||||
|
1670 - 1910 (170 - 195) |
1520 - 1770 (155 - 180) |
1230 - 1520 (125 - 155) |
||||||||||||||
|
1670 - 1910 (170 - 195) |
1520 - 1770 (155 - 180) |
1230 - 1520 (125 - 155) |
||||||||||||||
|
1620 - 1860 (165 - 190) |
1470 - 1720 (150 - 175) |
1180 - 1470 (120 - 150) |
||||||||||||||
|
1570 - 1810 (160 - 185) |
1420 - 1670 (145 - 170) |
1130 - 1420 (115 - 145) |
||||||||||||||
|
1520 - 1770 (155 - 180) |
1370 - 1620 (140 - 165) |
1130 - 1370 (115 - 140) |
||||||||||||||
|
1470 - 1720 (150 - 175) |
1370 - 1620 (140 - 165) |
1130 - 1370 (115 - 140) |
||||||||||||||
|
1420 - 1670 (145 - 170) |
1320 - 1570 (135 - 160) |
1080 - 1320 (110 - 135) |
||||||||||||||
|
1420 - 1670 (145 - 170) |
1320 - 1570 (135 - 160) |
1080 - 1320 (110 - 135) |
||||||||||||||
|
1230 - 1420 (125 - 145) |
1030 - 1230 (105 - 125) |
|||||||||||||||
|
1230 - 1420 (125 - 145) |
1030 - 1230 (105 - 125) |
|||||||||||||||
|
1230 - 1420 (125 - 145) |
1030 - 1230 (105 - 125) |
|||||||||||||||
|
1230 - 1420 (125 - 145) |
1030 - 1230 (105 - 125) |
|||||||||||||||
|
1230 - 1420 (125 - 145) |
1030 - 1230 (105 - 125) |
|||||||||||||||
|
1230 - 1420 (125 - 145) |
1030 - 1230 (105 - 125) |
|||||||||||||||
Notes:
1. The value of the run-up in tensile strength in coils (coils) weighing up to 250 kg of grades A and B of classes 1, 2, 2A should be no more than 100 N/mm 2 (10 kgf/mm 2); grade B class 3 and grade B of all classes for wire with a diameter of 1.6 mm and less - 200 N/mm 2 (20 kgf/mm 2), and for wire with a diameter of more than 1.6 mm - 150 N/mm 2 (15 kgf /mm 2). The value of the run-up in the temporary tensile strength of wire in coils (coils) weighing more than 250 kg must correspond to the values in table. 3.
2. If, when determining the tensile strength at the ends of a coil, the test results belong to two classes, then the membership of the coil in one of the classes is determined by the lower value. In this case, the larger value should not exceed the upper limit of the normalized tensile strength for the class to which the coil belongs by more than 50 (5) N/mm 2 (kgf/mm 2). This note is not taken into account if the wire belongs to grades A and B of class 2A of all diameters and class 2 with a diameter of 2.5 mm or more.
3. At the request of the furniture industry, wire with a diameter of 2.2 mm, high-precision grade B, is manufactured with a tensile strength of 1570 - 1770 N/mm 2 (160 - 180 kgf/mm 2).
(Changed edition, Amendment No. 3, 4, 5, Amendment).
2.6. The wire must be produced in coils or on spools.
Winding of wire should be done without interchanging the turns and ensure free winding of the wire from the spools and skeins. When releasing the skein from the ties, the wire should not curl into a figure eight.
The skein should consist of one piece of wire.
No more than three pieces of wire are allowed on a reel or coil weighing more than 250 kg. In places where the sections separate, bookmarks must be laid. Instead of marking the separation points, it is allowed to draw out and secure the ends of the segments on the cheek of the reel.
Tying the ends of wire sections is not allowed.
2.7. The weight of a piece of wire in a coil or on a reel must correspond to that indicated in the table. 5.
Table 5 *
* Table 4. (Deleted, Amendment No. 3).
The weight of wire pieces allowed is 50% less than that indicated in the table. 5 in an amount of no more than 10% of the total mass of wire in the batch.
At the request of the consumer, the mass of the skein (reel) should not exceed 1 ton.
2.6, 2.7. (Changed edition, Amendment No. 3).
3. ACCEPTANCE RULES
3.1. Wire is accepted in batches. The batch must consist of coils or coils of wire of the same diameter, the same class and the same manufacturing accuracy and must be documented with a quality document containing:
batch number;
number of cargo spaces;
net weight;
steel grade;
acceptance date.
(Changed edition, Amendment No. 2).
3.2. By size and appearance Each skein or reel of the batch is checked.
3.3. For check mechanical properties and waviness, if there is disagreement in the assessment of this indicator, 10% of the skeins or 20% of the coils are selected, but not less than five skeins or spools, and to check the decarbonization of 2% of the skeins or spools, but not less than three.
(Changed edition, Amendment No. 3).
3.4. If unsatisfactory test results are obtained for at least one of the indicators, a repeat test is carried out for this indicator on a double number of skeins (coils) taken from those that did not pass the test. The results of repeated tests apply to the entire batch.
If unsatisfactory results of repeated tests are obtained in terms of wire waviness, the manufacturer carries out continuous monitoring of this indicator.
4. TEST METHODS
4.1. For each type of test, one sample is taken from both ends of the skein for each type of test or one sample from each coil being tested.
(Changed edition, Amendment No. 1).
4.2. The diameter and ovality of the wire are measured with micrometers in accordance with GOST 6507 and GOST 4381 in two mutually perpendicular directions of the same section of the wire or with another measuring instrument that provides the necessary measurement accuracy.
(Changed edition, Amendment No. 3).
4.3. Inspection of the wire surface is carried out visually, and in controversial cases, using a five-fold magnifying glass. The depth of the wire defect should be determined by removing it by stripping, followed by comparative measurements of the wire in stripped and uncleaned areas. If it is impossible to determine the depth of the defect by cleaning, the depth and nature of the defect is determined by micro-examination.
4.4. Testing of wire for temporary resistance is carried out according to GOST 10446.
4.5. The bending test of the wire is carried out around a cylindrical core until the sides are parallel in accordance with the requirements of clause 2.5.
(Changed edition, Amendment No. 4).
4.6. The torsion test is carried out according to GOST 1545, in which the length of the tested part of the sample is set equal to 100 d(d - wire diameter), but not less than 50 and not more than 500 mm.
The non-delamination torsion test is carried out until the sample is completely destroyed.
Inspection of fractures is carried out with the naked eye. For wires with a diameter of less than 0.8 mm, a five-fold magnification magnifying glass can be used.
Note. Until 01.01.90, testing of wire for non-delamination was carried out by agreement between the manufacturer and the consumer.
(Changed edition, Amendment No. 3, 5, Amendment).
4.7. Determination of the depth of decarburization is carried out according to the M GOST 1763 method.
4.8. Wire coiling testing is carried out according to GOST 10447.
If disagreements arise in assessing the quality of the wire according to clause 2.5, instead of the coiling test, a bending test is performed.
(Changed edition, Amendment No. 3).
4.9. The absence of waviness is ensured by the manufacturing technology.
If disagreements arise in the assessment of waviness, it is determined on samples with a working length of (200 ± 0.5) mm with a micrometer in accordance with GOST 6507, equipped with a special heel (Appendix 2), using 10 measurements in two mutually perpendicular directions along the length of the sample.
The samples must be secured in the clamps of a tensile testing machine in accordance with GOST 28840 or another machine in accordance with regulatory and technical documentation that allows the required load to be applied.
The wire is considered wavy if the number of deviations from a constant diameter measured in one of the planes is 3 or more measurements.
The magnitude of the deviations must be greater than the error of the measuring instrument.
4.10. It is allowed to use statistical and non-destructive testing according to methods approved in accordance with the established procedure.
4.9, 4.10. (Introduced additionally, Amendment No. 3).
5. PACKAGING, LABELING, TRANSPORTATION AND STORAGE
5.1. Each skein must be firmly tied with soft wire according to regulatory and technical documentation in at least three places evenly spaced around the circumference.
Rolls of wire with a diameter of 0.60 mm or less can be tied with the end of a wound wire or twine in accordance with GOST 17308 or other regulatory and technical documentation.
Skeins of the same class, group and diameter can be knitted into coils.
The end of the upper piece of wire on the reel should be secured to the cheek of the reel.
(Changed edition, Amendment No. 3).
5.2. The wire must be coated with preservation oils (lubricants) type NG-203A or NG-203B according to TU 38-1011331 or K-17 according to GOST 10877.
It is allowed to use other oils (lubricants) that provide protection against corrosion. Wire on spools may be supplied ungreased.
(Changed edition, Amendment No. 3, 5).
5.3. Reels with wire with a diameter of less than 0.20 mm must be wrapped in a layer of paper and placed in wooden boxes in accordance with GOST 18617 or other normative and technical documentation, or in metal containers made according to normative and technical documentation, lined with waterproof paper on the inside.
Hanks, coils of wire with a diameter of 0.20 mm or more must be wrapped in a layer of paper, then in a layer of polymer film or non-woven materials, or fabric made of chemical fibers. For mechanized packaging, coils of wire must be wrapped in a layer of cable crepe paper in accordance with GOST 10396 or KMV-170 grade paper, or other crepe paper with equivalent protective properties, or polymer film with the packaging secured with wire in accordance with GOST 3282 or other wire.
By agreement between the manufacturer and the consumer, the wire may not be packaged or lubricated.
As packaging materials apply:
waxed paper in accordance with GOST 9569 (it is allowed to use two-layer packaging paper in accordance with GOST 8828 or oiled packaging paper in accordance with GOST 8273 grade A, or other paper that provides corrosion protection);
(Changed edition, Amendment No. 1, 3).
5.3a. The weight of one piece of cargo must be no more than 1500 kg.
The consolidation of cargo items into transport packages must be carried out in accordance with GOST 21650, GOST 24597.
(Changed edition, Amendment No. 3).
5.4. Each spool, skein or coil of wire must have a label firmly attached to it indicating:
trademark or name and trademark of the manufacturer;
wire symbol;
technical control mark;
batch number.
(Changed edition, Amendment No. 1, 3).
5.5. (Deleted, Amendment No. 2).
5.6. Wire is transported by all types of transport in accordance with the rules for the transportation of goods in force for this type of transport. The placement and securing of cargo in vehicles must comply with technical specifications loading and securing cargo.
Transporting wire by railway carried out by carload, small or low-tonnage shipments.
It is allowed to transport wire in universal containers according to
The wire is used to make springs that are cold-wound and not subject to hardening.
The wire is produced:
by mechanical properties:
- grades A, B and C
- classes 1, 2 and 3
by manufacturing accuracy:
- normal
- increased
The surface of the wire should be free of cracks, caps, dulls, hairlines and rust.
The maximum deviation in thickness and ovality should not exceed that indicated in the table.
The value of the run-up in tensile strength in coils (coils) weighing up to 250 kg of grade B grades 1, 2 should be no more than 100 N/m 2 (10 kgf/mm 2); grade B class 3 and grade B of all classes for wire with a diameter of 1.6 mm and less -200 N/mm 2 (20 kgf/mm 2), and for wire with a diameter of more than 1.6 mm -150 N/mm 2 (15 kgf/mm 2).
The value of the run-up in the tensile strength of wire in coils (coils) weighing more than 250 kg must comply with the requirements of GOST. The values are shown in the table.
|
Wire diameter, mm |
Tensile strength, N/mm 2 (kgf/mm 2) |
Temporary tensile strength run, no more, N/mm 2 (kgf/mm 2) |
Number of twists, not less |
||||||
|
2nd grade |
3rd grade |
Brand B |
Brand B |
Brand B |
Brand B |
||||
|
Class |
Class |
||||||||
|
2300-2740 (235-280) |
1810-2300 (185-235) |
||||||||
|
2160-2600 (220-265) |
1670-2160 (170-220) |
||||||||
|
2160-2550 (220-260) |
1670-2160 (170-220) |
||||||||
|
2110-2550 (215-260) |
1670-2110 (170-215) |
||||||||
|
2110-2500 (215-255) |
1620-2110 (165-215) |
||||||||
|
2060-2450 (210-250) |
1570-2060 (160-210) |
||||||||
|
2010-2400 (205-245) |
1520-2010 (155-205) |
||||||||
|
1960-2350 (200-240) |
1520-1960 (155-200) |
||||||||
|
1960-2300 (200-235) |
1520-1960 (155-200) |
||||||||
|
1420-1670 (145-170) |
1130-1420 (115-145) |
||||||||
|
1370-1620 (140-165) |
1130-1370 (115-140) |
||||||||
|
1370-1620 (140-165) |
1130-1370 (115-140) |
||||||||
|
1320-1570 (135-160) |
1080-1320 (110-135) |
||||||||
|
1320-1570 (135-160) |
1080-1320 (110-135) |
||||||||
|
1230-1420 (125-145) |
1030-1230 (105-125) |
||||||||
|
1230-1420 (125-145) |
1030-1230 (105-125) |
||||||||
|
| |||||||||