... , SUP11,50CrVA 3. Size: 6*40~20*15 aisi 6150 spring steel 1. Material: 65Mn, 60Si2Mn, SUP9, SUP9a, SUP7, SUP11, 50CrVA ... : 2~8m, according to your requirements.3. Surface: smooth plain; double grooved.4. Standard: GB, ASTM, JIS5. Usage: springs and chains ... for car and agriculture machines. Anchor plate. Laminated leaf spring.6. Package: Standard export packing. Coverd by PP paper outside ...