JIS Archives - 2ページ目 (7ページ中)

JIS SKS3 Steel: O1 Equivalent — Oil-Hardening Cold-Work Tool Steel for Short-Run Dies

SKS3 (JIS G4404) is Japan's O1-equivalent oil-hardening tool steel — simpler heat treatment than SKD11 with better toughness. Full guide: 1.2510 equivalent, heat treatment, and when SKS3 outperforms SKD11 for cold-work tooling.

2026.06.15

steel

JIS SKH55 Steel: M35 Cobalt HSS — Red Hardness for Difficult-to-Cut Materials

SKH55 (JIS G4403) is Japan's M35-equivalent cobalt HSS — 5% Co raises red hardness beyond standard M2. Full guide: 1.3243 equivalent, heat treatment, cutting tool applications for stainless, titanium, and Ni alloys.

2026.06.15

steel

JIS G4804 Free-Cutting Steel Guide: All SUM Grades, Machinability, and Selection

JIS G4804 covers 15 free-cutting steel grades — SUM11 to SUM43. Full guide: S, P, and Pb additions explained, machinability by grade, applications, and regulatory status of Pb-containing grades.

2026.06.12

steel

JIS G4103 Ni-Cr-Mo Steel Guide: SNCM Grade Comparison from SNCM220 to SNCM815

JIS G4103 covers 11 Ni-Cr-Mo structural steel grades — SNCM220 to SNCM815. Full guide: composition table, Ni content vs section size selection, carburizing vs through-hardening grades, and ASTM equivalents.

2026.06.10

steel

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.

2026.06.07

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.

2026.06.07

steel

SN400 / SN490 vs A992: Seismic Structural Steel Equivalent Grades & Properties

SN400 and SN490 vs ASTM A992 equivalent grades, Fy/Fu ratio control, Charpy impact requirements, and seismic structural applications. JIS G3136 complete properties guide.

2026.06.03

steel

JIS SNCM439 Steel: AISI 4340 Equivalent — Ni-Cr-Mo Alloy Steel for Heavy-Section Parts

JIS SNCM439 is a Ni-Cr-Mo high-hardenability alloy steel nearest to AISI 4340 and EN 36CrNiMo4. Explore composition, mechanical properties, heat treatment, and selection vs. SCM440.

2026.06.02

Heat Treatment

Carburizing vs. Induction Hardening: Which Surface Treatment to Choose

Compare carburizing and induction hardening for surface-hardened steel parts. Understand case depth, suitable materials, cost, and when to choose each process.

2026.06.02

Heat Treatment

JIS SUJ2 Steel: 52100 Equivalent — High-Carbon Chromium Bearing Steel

SUJ2 (JIS G4805) is Japan's 52100-equivalent high-carbon chromium bearing steel — 1.0% C / 1.5% Cr, hardens to 62–65HRC. Full guide: 100Cr6 equivalent, heat treatment, cryogenic processing, and bearing fatigue life.

2026.06.01

steel