52100 equivalent grades: ASTM, EN, JIS, GB, DIN
52100 is high-carbon chromium bearing steel specified in ASTM A295. What follows is the substitution list: 6 standard systems, and for each candidate the clause that makes it an exact match or stops it being one. The full 52100 data sheet carries the composition and mechanical tables.
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52100 is cross-certified with 535A99 (EN31), 100Cr6, GCr15 and 2 more: the composition windows overlap closely enough that one certificate satisfies the other. 100CrMnSi6-4, 100CrMo7-3 differ on one limit only — a carbon ceiling, an impact temperature or a strength minimum. 1095, O1 / 1.2510, 440C serve the same purpose without being the same steel, so a substitution there needs the design re-checked rather than the certificate. Across systems that is 1 in BS (superseded British), 3 in EN (European), 1 in GB/T (China), 1 in GOST (Russia/CIS), 1 in JIS (Japan), 3 in AISI / SAE.
Cross-reference table
| Grade | System | Match | Why / differences |
|---|---|---|---|
| 535A99 (EN31) | BS (superseded British) | Identical | BS 970 535A99: C 0.95–1.10, Cr 1.20–1.60. |
| 100Cr6 | EN (European) | 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. |
| GCr15 | GB/T (China) | 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. |
| ShKh15 | GOST (Russia/CIS) | Identical | GOST 801 ShKh15: C 0.95–1.05, Cr 1.30–1.65, Mn 0.20–0.40, Si 0.17–0.37. |
| SUJ2 | JIS (Japan) | Identical | JIS G4805 SUJ2: C 0.95–1.10, Cr 1.30–1.60, Mn ≤ 0.50, Si 0.15–0.35. |
| 100CrMnSi6-4 | EN (European) | 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 | EN (European) | Near | 1.3536 (SUJ5-type): Mo-bearing for large bearings and high-temperature use. |
| 1095 | AISI / SAE | Functional | Plain 0.95 % C: similar hardness, much lower hardenability, no chromium carbides — cheaper knife/spring alternative. |
| O1 / 1.2510 | AISI / SAE | Functional | Oil-hardening tool steel: similar heat treatment window, more W/V carbides for wear; preferred for dies. |
| 440C | AISI / SAE | Functional | Stainless bearing steel (S44004) for corrosive environments at similar hardness. |
Identical, near and functional are defined once on the grade index; the reason column below says which limit differs in each case.
52100 in BS (superseded British)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.