>Cold Heading Wire,Carbon Steel Wire
>Alloy Steel Cold Heading and Cold Forging
>China 42CrMo,SCM440,42CrMo4(1.7225),4140,708M40,42CD4,R683/Ⅱ３ Alloy Steel Cold Heading wire CHQ wire
Products Grade:China 42CrMo,SCM440,42CrMo4(1.7225),4140,708M40,42CD4,R683/Ⅱ３ Alloy Steel Cold Heading wire CHQ wire
Applied Standard: JIS SAE
Characteristics: The wire rod is used to produce cylinder nut and bolt ,rail bolt, tud bolt of class 12.9..
Use of Products: SCM440 is a commen steel grade which used to produce high strength bolt of class 12.9.This product has characteristics of uniform-chemical composition, low percentage of harmful elements, high purity, slight decarburisation, good surface quality. After spheroidize annealing, this product has the characteristics of good cold heading properties ,stable heat-treatment properties and good hardenability. SCM440 is similar to SCM435,but higher strength and hardenability.
鋼號 Grade 化學成份（Chemical composition）％ Ç Mn Si P S Cr Mo SCM415 0.13-0.18 0.60-0.85 0.15-0.35 0.30 MAX 0.30 MAX 0.90-1.20 0.15-0.30 SCM420 0.18-0.23 SCM435 0.33-0.38 SCM440 0.38-0.43 SCM445 0.43-0.48