martensitic

JIS SUS420J2 Steel: AISI 420 Equivalent — High-Carbon Martensitic for Blades & Molds

SUS420J2 (JIS G4303) is Japan's high-carbon martensitic stainless — hardenable to 50–56HRC. AISI 420 / 1.4028 equivalent. Properties, heat treatment, and blade/mold applications guide.

2026.06.18

stainless steel

JIS SUS410 Steel: AISI 410 Equivalent — Hardenable Martensitic Stainless for Valves & Cutlery

SUS410 (JIS G4303) is Japan's standard hardenable martensitic stainless — 12% Cr, heat-treatable to HRC 35–45. AISI 410 / 1.4006 equivalent. Properties, heat treatment, and applications.

2026.06.17

stainless steel

JIS G4311 / G4312 Heat-Resistant Steel Guide: SUH Grade Families Explained

JIS G4311 and G4312 cover Japan's SUH heat-resistant steel series across four structural families: martensitic, ferritic, austenitic, and precipitation-hardening. Full grade overview with service temperature limits, ASTM equivalents, and application decision framework.

2026.06.12

steel

SUH3 Steel: 10Cr-2Si Martensitic Heat-Resistant Steel for Diesel Exhaust Valves

SUH3 is a 10%Cr, 2%Si martensitic heat-resistant steel used in diesel and heavy-duty engine exhaust valves. Max service ~800°C. Covers composition, heat treatment (950–1050°C harden + 700–800°C temper), mechanical properties vs temperature, silicon's oxidation role, and comparison with SUH1, SUH4, and austenitic valve grades.

2026.06.05

steel