SUS440A Stainless Steel Standard: JIS
SUS440A Stainless steel hardening state, hard, but higher than sus440b, 11cr17 toughness.
●Hardness: annealing, ≤255HB, quenching and tempering, ≥54HV
●Heat Treatment Specification: 1 annealing, 800~920℃ slow cooling, 2 quenching, 1010~1070℃ oil cold, 3 empering, 100~180℃ fast cold.
●Delivery status: Generally in the state of heat treatment delivery.
SUS440A stainless steel used as cutting tools, measuring, bearing.