steel JIS FC200 Cast Iron: A48 Class 30 Equivalent — Gray Cast Iron for Machine Bases & Engine Blocks
FC200 (JIS G5501) is Japan's standard gray cast iron — flake graphite, ≥200 MPa tensile strength. Full guide: GJL-200 equivalent, all FC grades, vibration damping, machinability, and when to choose gray iron over ductile iron.