52100 equivalent grades: ASTM, EN, JIS, GB, DIN

Cross-reference for 52100 across standard systems. Each match is graded so you can see how safe the substitution is. High-carbon chromium bearing steel — full 52100 data sheet.

Cross-reference table

Identical = same composition and mechanical limits within rounding. Near = one limit differs (e.g. carbon max or impact temperature). Functional = interchangeable for most uses after an engineering check.

How the matches are graded

Identical means the chemical composition windows overlap so that material certified to one specification meets the other without deviation, and the mechanical minimums are the same or the other is inside them — mills usually dual-certify. Near means one limit differs (a carbon maximum, an impact temperature, a strength minimum or a delivery condition) and a substitution needs a one-line engineering check. Functional means the grades serve the same purpose but are not the same steel — a designer can often use one for the other, but only after re-checking the design.

52100 in BS (superseded British)

• 535A99 (EN31) — Identical BS 970 535A99: C 0.95–1.10, Cr 1.20–1.60.

52100 in EN (European)

• 100Cr6 — Identical 1.3505 (EN ISO 683-17): C 0.93–1.05, Cr 1.35–1.60, Mn 0.25–0.45, Si 0.15–0.35 — identical; dual-certified.
• 100CrMnSi6-4 — Near 1.3520 (SUJ3 / GCr15SiMn / ShKh15SG): Mn 1.0–1.2, Si 0.5–0.7 — higher hardenability for rings > 30 mm wall.
• 100CrMo7-3 — Near 1.3536 (SUJ5-type): Mo-bearing for large bearings and high-temperature use.

52100 in GB/T (China)

• GCr15 — Identical GB/T 18254 GCr15: C 0.95–1.05, Cr 1.40–1.65, Mn 0.25–0.45, Si 0.15–0.35.

52100 in GOST (Russia/CIS)

• ShKh15 — Identical GOST 801 ShKh15: C 0.95–1.05, Cr 1.30–1.65, Mn 0.20–0.40, Si 0.17–0.37.

52100 in JIS (Japan)

• SUJ2 — Identical JIS G4805 SUJ2: C 0.95–1.10, Cr 1.30–1.60, Mn ≤ 0.50, Si 0.15–0.35.

52100 in AISI / SAE

• 1095 — Functional Plain 0.95 % C: similar hardness, much lower hardenability, no chromium carbides — cheaper knife/spring alternative.
• O1 / 1.2510 — Functional Oil-hardening tool steel: similar heat treatment window, more W/V carbides for wear; preferred for dies.
• 440C — Functional Stainless bearing steel (S44004) for corrosive environments at similar hardness.

Superseded names for 52100

• E52100 — AISI: E = electric-furnace melted; all current 52100 is E52100.
• G52986 — UNS
• 100Cr6 / 1.3505 — EN ISO 683-17 / DIN 17230: European twin; 100CrMnSi6-4 (1.3520) for larger sections.
• 535A99 / EN31 — BS 970: EN31 remains the common Indian/UK name.
• SUJ2 — JIS G4805: Japanese twin; SUJ3 = higher Mn/Si.
• GCr15 — GB/T 18254: Chinese twin.
• ShKh15 — GOST 801: Russian twin.

Key data for 52100

Full composition, mechanical properties by thickness, heat treatment and applications for 52100 →

Verified against ASTM A295/A295M-21. Last checked: September 2026.