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Elements (Max.) C Mn P S Si Cr Mo .75 1.00 .040 .030 1.00 16/18 0.75
Type 440A is a hardenable chromium steel with greater attainable hardness than Type 420 and with greater toughness than Types 440B and 440C. It has its optimum corrosion resisting qualities in the hardened and tempered condition. Type area is magnetic in all conditions.