... -22A,SAE1018, 50BV30,SCM435,SCM440,ML35, SCr420B, 35VB, SWRCH35K, SWRCH40K Cold heading wire rodSize: 5.5--42mmGrade:SWRCH6A-22A,SAE1018, 50BV30,SCM435 ... .), shipbuilding, electronic, and building industry. And it has good surface quality and perfect cold formability.