SS400

SS400, S45C & SCM435: Steel Selection Guide for Mechanical Designers

SS400 (≈A36), S45C (≈1045), SCM435 (≈4135): learn how to choose the right JIS steel for your design. Includes chemical composition comparison, hardenability data, failure cases, and sourcing tips for engineers outside Japan.

2026.05.29

steel

SS400 vs SM400: Why Japan’s Two “Same-Strength” Structural Steels Are Not Interchangeable

SS400 and SM400 have identical tensile strength, yet engineers in Japan treat them as completely different materials. Learn why — and what to order outside Japan.

2026.05.26

steel

JIS SS400 Steel: A36 Equivalent, Properties & Applications

SS400 is Japan's most-used structural steel. Compare SS400 vs ASTM A36, EN S275JR equivalents, chemical composition, mechanical properties, and welding tips.

2026.04.26

steel