S55C

JIS S55C Steel: AISI 1055 Equivalent, Properties & Spring Applications

JIS S55C is a high-carbon steel equivalent to AISI 1055 and DIN C55. Learn its composition, mechanical properties, heat treatment for springs and wear parts, and selection guide.

JIS G4051 Carbon Steels for Machine Structural Use — Full Grade Comparison

JIS G4051 defines carbon steels for machine structural use. Complete guide to all grades (S15C to S55C), chemical composition, mechanical properties, and selection criteria.