Skip to product information
1 of 5

PayPal, credit cards. Download editable-PDF and invoice in 1 second!

GB/T 4357-1989 English PDF (GBT4357-1989)

GB/T 4357-1989 English PDF (GBT4357-1989)

Regular price $80.00 USD
Regular price Sale price $80.00 USD
Sale Sold out
Shipping calculated at checkout.
Quotation: 24-hr self-service. Click GB/T 4357-1989
See Chinese contents: GB/T 4357-1989

GB/T 4357-1989: [GB 14647-2008] Carbon spring steel wires

This Standard specifies the classification, dimension, shape, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of carbon spring steel wires. This Standard applies to cold-drawn non-alloy steel wires for springs, with circular cross section, used for machinery.
GB/T 4357-1989 (Renamed from GB 4357-1989)
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
GB/T 4357-1989
Replacing GB 4357-84
Carbon spring steel wires
APPROVED ON: FEBRUARY 02, 1989
IMPLEMENTED ON: JANUARY 01, 1990
Approved by: Ministry of Metallurgical Industry of the PRC
Table of Contents
1 Subject content and scope of application ... 3
2 References ... 3
3 Classification, code ... 3
4 Dimension, shape and weight ... 4
5 Technical requirements ... 5
6 Test methods ... 8
7 Inspection rules ... 9
8 Packaging, marking and quality certificate ... 9
Additional information: ... 10
Carbon spring steel wires
1 Subject content and scope of application
This Standard specifies the classification, dimension, shape, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of carbon spring steel wires.
This Standard applies to cold-drawn non-alloy steel wires for springs, with circular cross section, used for machinery.
2 References
GB 228 Metallic materials - Tensile testing
GB 239 Metallic materials - Wire-torsion test
GB 342 Dimension, shape, weight and tolerance for cold-drawn round steel wires
GB 1298 Carbon tool steels - Technical requirements
GB 2103 General provisions for checking, packing, marking and quality
certification of steel wire
GB 2976 Metallic materials - Wire-wrapping test
GB 4354 Quality carbon steel wire rods
GB 6397 Metallic materials - Tensile test specimen
3 Classification, code
According to the purpose of steel wires, they are divided into three classes: Class B: for low stress springs;
Class C: for medium stress springs;
Class D: For high stress springs.
1.00 mm and diameter allowable deviation of h11, is marked as:
Order according to steel grade and tensile strength class:
A carbon spring steel wire made of T9A, with mechanical properties of Class D, diameter of 1.00 m and diameter allowable deviation of h11, is marked as: 5 Technical requirements
5.1 Designation and chemical composition
5.1.1 Steel wires shall be made of the designations specified in GB 4354 and GB 1298. They can also be made of steel wire rods of other designations with similar quality.
5.1.2 The sulphur content of steel wire rods is not greater than 0.030 %, and the sulfur content is not greater than 0.020 %.
5.2 Mechanical properties
The tensile strength of steel wires shall comply with the provisions of Table 2. The tensile strength of steel wires of intermediate dimensions is in accordance with the provisions of the adjacent larger dimension.
Table 2
Carbon spring steel wire
Carbon spring steel wire
Diameter Tensile strength, MPa
Class B Class C Class D
bent at 90?? in
different
directions along
an arc of R = 10
mm.
6 Wrapping test
10 %, not
less than 3
rods, one
end
GB 2976
7 Inspection rules
7.1 Inspection and acceptance shall be carried out by the technical supervision department of the supply party.
7.2 Batching rules
Steel wires shall be inspected and accepted in batches. Each batch shall consist of steel wires of the same designation, the same strength class and the same diameter.
7.3 Re-inspection
The re-inspection of steel wires shall be carried out according to the provisions of GB 2103.
There are two specimens for tensile strength and two specimens for torsion. If each of them has one specimen of which the test result is not qualified, the unqualified item can be re-inspected. At this point, the two ends of the steel wire rod shall be removed for a certain length and then two specimens shall be taken for re-inspection. The results must meet the provisions of this Standard. 8 Packaging, marking and quality certificate
The packaging, marking and quality certificate of steel wires shall comply with the provisions of GB 2103. The type of packaging shall meet the requirements of Class III, and other types are indicated in the contract.
____________________

View full details