A9 Tool Steel is an air-hardening cold work steel that allows minimal cracking and distortion on quenching.
Specifications:
UNS T30109, ASTM A681, QQ-T-570, AISI A9, ASTM A9
Applications:
Blanking and forming dies, shear blades, hot gripper dies, drill bushings, knurling tools, master dies and gauges.