Composition (Nominal)
1.00 C, 0.80 Mn, 0.30 Si, 5.25 Cr, 1.10 Mo, 0.20 V, Bal. Fe
Air-hardening steel capable of hardening throughout in heavy sections. Good balance between hardness and toughness. Has been used for large blanking dies, long punches, rolls, coining dies. Available as DeCarb-Free (DCF).
Specifications: ASTM A681, QQ-T-570