SWCH22A This material is specified in JIS G3539 and is called Carbon Steel Wire for cold heading and cold forging.
SWRCH22A SWCH: (steel wire cold heading) JIS mark: carbon steel wire for cold heading 0.18-0.23 Below 0.10 0.70-1.00 below 0.030 below 0.035 Above 470 (D project) Above 440 (DA project)
22: Carbon content is 0.22%
A: Aluminum deoxidized steel
Chemical component：C:0.18-0.23；Si:≤0.10; Mn:0.70-1.00; P:≤0.030; S:≤0.035; AL:≥0.02
Main distinction：
SWRCH22A This is the material specified in JIS G3507，When this kind of wire is rolled into a small steel embryo, the small steel embryo needs to grind away the surface defects harmful to the subsequent forging (such as Seam seam) to avoid cracking during forging, the use of this kind of wire in Taiwan is guaranteed not to crack, in fact, when doing fasteners, there is no difference between these two kinds of steel,SWRCH is used more widely
