China · GB

ML35

GB/T 6478:2001 — Steels for cold heading and cold extruding

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GB/T 6478:2001Steels for cold heading and cold extruding
GB/T 6478:2015Steels for cold heading and cold extruding
GB/T 5953:1999Steel wires for cold heading
GB/T 5953.1:2009Steel wire for cold heading and cold forging. Part 1:Intended for heat treatment
GB/T 28906:2012Hot rolled wire rod for cold heading
GB 6478:1986Cold heading steel--Technical requirements
GB/T 3632:2008Sets of torshear type high strength bolt hexagon nut and plain washer for steel structures
GB/T 5953:1986Steel wires for cold heading

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Heat treatment / condition	Yield strength	Tensile strength	Elongation	Reduction of area	Impact energy	Hardness
steel bars, wire, Heat treated	≤315	≤530	≤20	≤45
steel bars, HB						线材 Heat treated 187

Type	3	4
Heat-treatment process	Normalized	AC3+30℃~50℃