AISI 440A / JIS SUS440A / EN 1.4109 / DIN X70CrMo15
Cutlery and scissors.
cold rolled and hot rolled, annealed
Packaging & Delivery
35 days after receipt the 30% advanced payment
440A high carbon stainless steel, UNS S44002, 7Cr17MoV, EN 1.4109, DIN X70CrMo15, Strips, Coils, sheets, plates
Steel Type 440A is a high-carbon martensitic stainless steel developed to provide stainless properties with maximum hardness. It is magnetic in both the annealed and hardened conditions. Maximum hardness and corrosion resistance are available only in the hardened or hardened and stress relieved conditions, so the alloy is not used in the annealed or annealed and tempered conditions. Dental and surgical instruments and cutlery are frequent applications for Type 440A.
CORROSION RESISTANCE Type 440A provides good corrosion resistance in the hardened and stress relieved condition. It is resistant to fresh water, steam, crude oil, gasoline, perspiration, alcohol and foodstuffs.
HEAT TREATMENTS Full Annealing: Heat uniformly at 1500 – 1600 °F (816 – 871 °C), soak and cool slowly in furnace to 1000 – 1200 °F
(538 – 649 °C) at a rate of 20 – 50 °F (11 – 27 °C) per hour, then cool in air, oil or water. Process Annealing: Heat at 1350 – 1450 °F (732 – 788 °C), then cool very slowly in the furnace. Hardening: Preheat slowly to 1450 °F (788 °C) and soak, then raise temperature to 1850 – 1950 °F (1010 – 1066 °C), quench in warm oil or air. Produces Rockwell hardness of C55 – 58. Stress relieve immediately. A subzero treatment of -100 °F (-73 °C) is recommended in order to obtain
maximum hardness. Stress Relieving: Heat to 300 – 800 °F (149 – 427 °C) for 1 to 3 hours, air cool.
Your contact - we are specialized in the high performance stainless martensitic steels. Paul skype: paul_luhongxiang cell: 86 15190257143 export @ ahoneststeel.com