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GB/T 4240-1993 English PDF (GBT4240-1993)

GB/T 4240-1993 English PDF (GBT4240-1993)

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GB/T 4240-1993: Stainless steel wires

This Standard specifies classifications, designations, dimension, shape, technical requirements, test methods, inspection rules, package, marks, and quality certificate for stainless steel wires.
GB/T 4240-1993 (GB/T 4240-93)
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
GB/T 4240-93
Replacing GB/T 4240-84
Stainless Steel Wires
ISSUED ON. JUNE 1, 1993
IMPLEMENTED ON. JANUARY 1, 1994
Issued by. China State Bureau of Technical Supervision
Table of Contents
1 Subject content and applicability ... 3
2 Normative references ... 3
3 Classification and designations ... 3
4 Dimension and shape ... 4
5 Technical requirements ... 5
6 Test methods ... 8
7 Inspection rules ... 8
8 Package, marks, and quality certificate ... 9
Additional explanation... 10
Stainless Steel Wires
1 Subject??content??and??applicability
This Standard specifies classifications, designations, dimension, shape, technical requirements, test methods, inspection rules, package, marks, and quality certificate for stainless steel wires.
This Standard is applicable to stainless steel wires (hereinafter referred to as ?€?steel wire?€?); it is not applicable to the ones that are used for spring, cold upsetting, and welding.
2 Normative??references
GB 222 Method of Sampling Steel for Determination of Chemical
Composition and Permissible Variations for Product Analysis
GB 223 Methods for Chemical Analysis of Iron, steel, and Alloy
GB 228 Tensile Test Method for Metal
GB 342 Dimension, Shape, Mass, and Tolerance for Cold-drawn Round
Steel Wires
GB 1220 Stainless Steel Bars
GB 2103 General Provisions for Checking, Packing, Marking, and Quality
Certification of Steel Wire
GB 3207 Bright Steel
3 Classification??and??designations
The steel wire is divided into three types according to its texture; its type, designations, condition, and code are listed in Table 1.
Table 1
Types Designations Delivery state Code
Austenitic type OCr17Ni12Mo2 1Cr18Ni9
Cold drawing
Light drawing
Table 2 in. mm
Steel wire diameter Inner-diameter of steel wire reel not less than
0.05 ~ 0.45
> 0.45 ~ 1.40
> 1.40 ~ 2.00
> 2.00 ~ 6.00
> 6.00 ~ 14.00
Reel or 100
4.6 It can provide straightening wire and bright steel wire according to the requirement of purchasers. The dimension and shape of straightening wire shall be in accordance with those specified in GB 342. And the dimension and shape of bright steel wire shall be in accordance with those specified in GB 3207.
4.7 Marking example
The cold-drawing steel wire with diameter of 1.0 mm manufactured with
1Cr18Ni9 is marked as.
Stainless steel wire 4240/9181
3420.111
TGBLNiCr
GBh
?€??€?
?€??€?
5 Technical??requirements
5.1 Chemical compositions
5.1.1 The chemical compositions (smelting analysis) of the steel used in steel wires shall be in accordance with those specified in GB 1220.
5.1.2 The permissible variation of chemical compositions for steel wire shall be in accordance with those specified in GB 222.
5.2 Delivery state
The steel wire shall be delivered according to the delivery state specified in Table 1.
Soft (R). steel wire has acid pickling and the similar treatment after having bright heat treatment or heat treatment.
Light drawing (Q). steel wire is drawn of small extent of deformation after the heat treatment.
Cold drawing (L). steel wire has general drawing after the heat treatment. those specified in Table 6.
7.4 Re-inspection and determining rules
Re-inspection and determining rules shall be in accordance with the provisions specified in GB 2103.
8 Package,??marks,??and??quality??certificate
Package, marks, and quality certificate shall be in accordance with the provisions specified in GB 2103. Steel wire of austenite and ferrite types shall be packed according to type-???c; and that of martensite type shall be packed according to type-???.
Additional??explanation.
This Standard was proposed by the Ministry of Metallurgical Industry of the People's Republic of China.
This Standard shall be under jurisdiction of China Metallurgical Industry Information and Standardization Research Institute.
This Standard was drafted by Dalian Steel Plant.
Main drafters of this Standard. Xu Xiaoqian and Wang Xinchong.

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