This part specifies the classifications and designations, order contents, dimension, appearance, weight and permissible tolerance, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of steel wire for cold heading and cold forging but not intended for heat treatment (hereinafter referred to as steel wire).
This part is applicable to the round steel wire for general rivets and screws, bolts and studs and other fasteners and other cold forming parts. Fasteners and other cold forming parts do not need heat treatment after cold heading and cold forging.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 222 Permissible Deviations for Chemical Composition of Steel Products
GB/T 223.3 Methods for Chemical Analysis of Iron, Steel and Alloy — the Diantipyrylmethane Phosphomolybdate Gravimetric Method for the Determination of Phosphorus Content
GB/T 223.5 Steel and Iron — Determination of Acid-Soluble Silicon and Total Silicon Content — Reduced Molybdosilicate Spectrophotometric Method
GB/T 223.9 Iron, Steel and Alloy — Determination of Aluminium Content —Chrom Azurol S Photometric Method
GB/T 223.58 Methods for Chemical Analysis of Iron, Steel and Alloy — The Sodium Arsenite-sodium Nitrite Titrimetric Method for the Determination of Manganese Content
GB/T 223.59 Iron Steel and Alloy — Determination of Molybdenum Content — Bismuth Phosphomolybdate Blue Spectrophotometric Method and Antimony Phosphomolybdate Blue Spectrophotometric Method
GB/T 223.60 Methods for Chemical Analysis of Iron, Steel and Alloy — The Perchloric Acid Dehydration Gravimetric Method for the Determination of Silicon Content
GB/T 223.61 Methods for Chemical Analysis of Iron, Steel and Alloy — the Ammonium Phosphomolybdate Volumetric Method for the Determination of Phosphorus Content
GB/T 223.62 Methods for Chemical Analysis of Iron, Steel and Alloy — the Butyl Acetate Extraction Photometric Method for the Determination of Phosphorus Content
GB/T 223.63 Methods for Chemical Analysis of Iron, Steel and Alloy — The Sodium (Potassium) Periodate Photometric Method for the Determination of Manganese Content
GB/T 223.64 Iron Steel and Alloy — Determination of Manganese Content — Flame Atomic Absorption Spectrometric Method
GB/T 223.67 Iron Steel and Alloy — Determination of Sulfur Content — Methylene Blue Spectrophotometric Method
