This standard specifies the classification, dimension, appearance and permissible deviation, technical requirements, test methods, inspection rules, packing, marking and inspection certificates of steel wire for ropes.
This standard is applicable to manufacturing bright and zinc-coated carbon steel wires of round section for steel wire ropes of different functions.
2 Normative References
The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of these documents are applicable. For undated references, the latest edition of the normative document referred to applies.
GB/T 228 Metallic Materials - Tensile Testing at Ambient Temperature (GB/T 228 2002, eqv ISO 6892: 1998)
GB/T 238 Metallic materials - Wire - Reverse Bend Test (GB/T 238 2002, ISO 7801: 1984, IDT)
GB/T 239 Metallic Materials Wire Torsion Test (GB/T 239-1999, eqv ISO 7800: 1984)
GB/T 1839 Steel Product - Zinc Coating Mass Testing Method (GB/T 1839 2008, ISO 1460-1998, MOD)
GB/T 2103 General Provisions for Checking, Packing, Marking and Quality Certification of Steel Wire
GB/T 2976 Metallic Materials - Wire - Wrapping Test (GB/T 2976-2004, ISO 7802: 1983, IDT)
GB/T 4354 Hot Rolled Quality Carbon Steel Wire Rods
3 Classification
3.1 Classified according to the surface condition of steel wires: bright and zinc-coated. The galvanized steel wires are divided into three classes: Class B, Class AB and Class A.
3.2 Classified according to the quality grade of steel wire: steel wire for major purpose and steel wire for general purpose.
4 Dimension, Appearance and Permissible Deviation
4.1 Diameter
4.1.1 Nominal diameter
The nominal diameter refers to a nominal dimension (in mm) designated the supplier and the purchaser, which is used to carry out inspection and acceptance on the technical indexes of steel wire.
4.1.2 Measured diameter
The measured diameter refers to the arithmetic average of two measuring results on the orthogonal direction of the same section.
4.1.3 Permissible deviation of diameter
The permissible deviation of steel wire diameter shall be in accordance with those specified in Table 1.
