cast-iron

JIS FCD450 Ductile Iron: A536 Grade 65-45-12 Equivalent — Nodular Cast Iron for Crankshafts & Gears

FCD450 (JIS G5502) is Japan's A536 Grade 65-45-12 equivalent ductile iron — 450 MPa tensile, 10% elongation. Full guide: GJS-450-10 equivalent, all FCD grades, austempering to ADI, and when FCD outperforms FC gray iron.

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.