Japan steels are listed in JIS Z2550, with grade names changing with the revision from 1989 to 2000. TYPE. GRADES. DESCRIPTION. Chromium-Manganese Steel. MPIF/ASTM FL-5108, FL-5208, MPIF/ASTM FLC2-5208, FL-5305 ISO FL-07Cr2M, FL-05Cr3M. Low alloy steel with prealloyed manganese, chromium, and molybdenum for improved strength and hardenability.
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