ASTM Archives - 2ページ目 (6ページ中)

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 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

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 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

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