This standard specifies the classification, grade, size, shape, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of stainless steel wire. This standard applies to stainless steel wire, but not to stainless steel wire for springs, cold forging and welding. GB/T 4240-1993 Stainless steel wire GB/T4240-1993 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Stainless steel wire
Stainless steel wlres
1 Subject content and scope of application
CB/T 4240--93
Replaces GB 4240--84
This standard specifies the classification, brand, size, shape, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of stainless steel wire.
This standard applies to stainless steel wire (hereinafter referred to as steel wire), but does not apply to stainless steel wire for spring, cold forging and welding. 2 Reference standards
GB 222 Chemical analysis of steel sample test method and chemical composition tolerance of finished products GR223
Chemical analysis of steel and alloys
Methods for tensile testing of alloy steel
Dimensions, shape, weight and tolerances of cold drawn round steel wire GB1220 Stainless steel bars
GB2103
General provisions for acceptance, packaging, marking and quality certificate of steel wire GB3207 Silver-filled
3 Classification and grade
Steel wire is classified according to its organization, and its category, grade, state and code are listed in Table 1, Table
OC117Ni12Mu2
ICr1RNig
1Cr18Ni9Ti
otcr18Nig
0Cr19Ni9V
QC- 17Ni14M02
YICr18Nig
YICr18NigSe
1Cr18Ni12
OCr18Ni11Ti
Cr18Ni11Nb
Approved by the State Administration of Technical Supervision on 19930601
Delivery status
Implemented on 1994-01-01
Austenite
Ferrite
Martensite
00Cr19i11
OCr23Ni13
0Cr25Ni20
YIcr17
Y1Cr13
1Cr17Ni2
4Dimensions and appearance
GB/T 4240.-93
Delivery status
4.1 The diameter of the steel wire shall comply with the provisions of Table 1 in GB342. Code
Diameter range: Soft state 0.05mm~14.0mm, light drawing α.50mm~14.0mm Cold drawing 0.5mm~6.0mm4. 2 The allowable deviation of the steel wire diameter shall comply with the provisions of Class 11 (h11) in Table 3 of GB 342. 4.3 The out-of-roundness of the wire shall not be greater than half of the diameter tolerance. 4.4 Each coil of steel wire shall be regular and shall not be scattered or co\ shaped. 4.5 The inner diameter of the steel wire coil shall comply with the provisions of Table 2. When the buyer has special requirements for the coil diameter, the supply and demand parties shall negotiate and stipulate, Table 2
Wire diameter
0. 05 ~ 0. 45
>0.45~-1.40
>1. 40~2. 00
≥2. 00--6. 04
>6. 00~14. 00
The inner diameter of the wire coil is not less than
Wire auxiliary or 100
4.6Straight steel wire and silver bright steel wire can be provided according to the requirements of the buyer. The size and shape of the white steel wire shall comply with the requirements of GB312. The size and shape of the silver bright steel wire shall comply with the requirements of GB 3207. 4.7 Marking Example
The cold-drawn stainless steel wire with a diameter of 1.0 mm made of 1Cr18Ni9 is marked as: stainless steel wire
5 Technical requirements
5.1 Chemical composition
hI1-1. 0-GR 342
1Cr18Xi9-L-GB/T 4240
5.1.1 The chemical composition (melting analysis) of the steel used for the steel wire shall comply with the provisions of GB1220. GB/T 4240-93
5.1.2 The allowable deviation of the chemical composition of the steel wire shall comply with the provisions of GB 222. 5.2 Delivery status
The steel wire shall be delivered in the delivery status specified in Table 1. Soft state (R): The steel wire is brightly heat treated or pickled and similarly treated after heat treatment. Light drawing (Q): The wire is drawn with a small degree of deformation after heat treatment. Cold drawing (L): After heat treatment, the steel wire is subjected to conventional drawing. 5.3 Mechanical properties
5.3.1 The mechanical properties of the steel wire shall comply with the provisions of Table 3. 5.3.2 The mechanical properties of the lightly drawn steel wire shall comply with the provisions of Table 4. 5.3.3 The mechanical properties of the cold drawn steel wire shall comply with the provisions of Table 5. Table 3
Diameter mm
0. C5 ~~0. 10
>0. 10~0. 30
>0. 30~0. 60
>0. 60~1. 00
>1. 00 ~3. 00
>3. 00 ~6. 00
>6. 00~14. 00
0.05~14. 00
Tensile strength,MPa
6901130
640-~980
590--930
54-880
490-830
490-830
490~790
590~830
Tensile test
Elongation not less than,%
Note: The elongation values ​​listed in the table are not applicable to Y1C:r18Ni9 and Y1Cr18Ni9Se. Table 4
Diameter, mm
0.50~-1.00
1. 00~3. 00
>3. 00 ~ [. 00
>6. 00 ~14. 00
Tensile strength, MPa
830~1180
780-11341
730-1080
730--1030
Grade and state code
OCr17Ni12Mo2-R
Y1Cr18NigSe R
1Ct18Ni9R
1Cr18Ni12-R
1Cr18Ni9Ti-R
OCr18Ni11Ti-R
oCr18Nig R
OCr19Ni9V-R
OCr18Vi11Nb R
00Cr19Ni11-R
00Cr17Ni14Mo2-R
DCr23Ni13-R
Y1Cr18Ni9-R
0Cr25Ni20-R
4Cr13-RCr18-R
1Cr17Ni2R
Grade and state code
OCr17Ni12M o2-Q
1Gr18Ni9-Q.JCr18Ni12-Q
YICr18NigSe-Q
ICr18Vi9Ti-Q,0Cr18Ni 11Ti-Q
OCr18Ni9-Q
OCr18NillNh-Q
OCr19Ni9N-Q
Diameter, mm
0. 50 ~ 3. 00 ||tt | 00~6.00
GB/T4240---93
Continued Table 4
Tensile strength +MPa
00Cr19Ni11-Q
Grade and state code
00Cr17Ni14Mo2-Q
Cr23Ni13-Q
YiCr18Ni9-Q
OCr25Ni20-Q
640--930
590880
590~B40
540~790
490~740
Tensile strength, MPa
1180~1520||t t||1130~1470
1080~～[420
Y1Cr13-Q
Y1C117-Q
2Cr13-Q
3Cr13Qwww.bzxz.net
1C13-0
1Cr17-Q
Brand and state code
0Cr17Ni12Mo2-L
1C-18Ni9-L
1Cr18Ni9Ti-L
OC118Ni9-L
OCCr1UNigV-1.
5.3.4 The upper and lower limits of the mechanical properties of straight steel wire and silver bright steel wire are allowed to fluctuate by 10%. 5.4 Surface quality
The surface of the steel wire should be smooth and clean; no scars, folds, scales, cracks, pitting and scratches that are harmful to use are allowed. Individual pitting, scars and scratches with a depth not exceeding half of the diameter tolerance are allowed. Spiral lines and lubricant residues are allowed on the surface of straight steel wire. Ammoniation film is allowed on the surface of martensitic steel wire delivered in a state of delivery. 5.5 Special requirements
5.5.1 According to the requirements of the purchaser, steel wire with mechanical properties within a specific range can be provided. 5.5.2 According to the requirements of the purchaser, austenitic steel wire can be subjected to intergranular corrosion test. The test method shall be agreed upon by the supply and demand parties and stated in the contract. 6 Test method
The test method of steel wire shall be carried out in accordance with the provisions of Table 6. No.
Test Item
Chemical Analysis
Quality Report
Pulsation Test
Inter-product Corrosion
Note: The chemical composition is provided by the supplier for smelting analysis. Inspection rules
7.1 Inspection and acceptance
GB/T 4240—93
Test method
Measure with corresponding precision tools
Visual inspection
GB228, sample gauge length 100mm
Agreement between both parties
The inspection and acceptance of steel wire shall comply with the provisions of GB2103. 7.2 Batch rules
Quantity and location of sampling
GB 222, one per furnace
Sampling by reel (branch)
Sampling by tree (branch)
Sampling from the end of three reels (branch) in each batch
-End sampling
Two reels (branch) in each batch
Steel wires shall be inspected in batches. Each batch shall consist of steel wires of the same furnace number, same brand, same size and same delivery status. 7.3 Sampling quantity and location
The sampling quantity and location of steel wire shall comply with the provisions of Table 6. 7.4 Re-inspection and judgment rules
The re-inspection and judgment rules shall comply with the provisions of GB2103. 8 Packaging, marking and quality certificate
Packaging, marking and quality certificate shall comply with the provisions of GB2103. Austenitic and ferritic type steel wires are packaged as Class Ic, and martensitic type steel wires are packaged as Class Ic.
Additional instructions:
This standard was proposed by the Ministry of Metallurgical Industry of the People's Republic of China. This standard is under the jurisdiction of the Information Standards Research Institute of the Ministry of Metallurgical Industry. This standard was drafted by Renlian Steel Plant.
The main drafters of this standard are Xu Xiaoqian and Wang Xinchong. The level mark of this standard is GB/T1240-931
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