8620 equivalent grades: ASTM, EN, JIS, GB, DIN
Cross-reference for 8620 across standard systems. Each match is graded so you can see how safe the substitution is. Nickel-chromium-molybdenum case-hardening steel — full 8620 data sheet.
Cross-reference table
| Grade | System | Match | Why / differences |
|---|---|---|---|
| 805M20 (EN362) | BS (superseded British) | Identical | BS 970 805M20: C 0.17–0.23, Ni 0.35–0.75, Cr 0.35–0.65, Mo 0.15–0.25. |
| 20NiCrMo2-2 | EN (European) | Identical | 1.6523 (EN 10084; formerly 21NiCrMo2): C 0.17–0.23, Ni 0.40–0.70, Cr 0.35–0.70, Mo 0.15–0.25. |
| 20CrNiMo | GB/T (China) | Identical | GB/T 3077 20CrNiMo: C 0.17–0.23, Ni 0.35–0.75, Cr 0.40–0.70, Mo 0.20–0.30. |
| SNCM220 | JIS (Japan) | Identical | JIS G4053 SNCM220: C 0.17–0.23, Ni 0.40–0.70, Cr 0.40–0.65, Mo 0.15–0.30. |
| 8615 / 8617 / 8622 | AISI / SAE | Near | Carbon steps of the 86xx family (0.15, 0.17, 0.22 % C) for lighter or heavier cores. |
| 20KhGNM / 20KhN2M | GOST (Russia/CIS) | Near | GOST 4543 20KhGNM (C 0.18–0.23, Ni 0.40–0.70, Cr 0.40–0.70, Mo 0.15–0.25) is the closest Russian match. |
| 4320 / 18CrNiMo7-6 | AISI / SAE | Functional | Higher-Ni grades (1.8 / 1.5 % Ni) for larger, more heavily loaded gears. |
| 1018 / C15 | AISI / SAE | Functional | Unalloyed case-hardening steels for small, lightly loaded parts. |
| 16MnCr5 | EN (European) | Functional | European Mn-Cr case-hardening steel with similar hardenability, no Ni — the usual EU substitute in gear practice. |
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.
8620 in BS (superseded British)
- 805M20 (EN362) — Identical BS 970 805M20: C 0.17–0.23, Ni 0.35–0.75, Cr 0.35–0.65, Mo 0.15–0.25.
8620 in EN (European)
- 20NiCrMo2-2 — Identical 1.6523 (EN 10084; formerly 21NiCrMo2): C 0.17–0.23, Ni 0.40–0.70, Cr 0.35–0.70, Mo 0.15–0.25.
- 16MnCr5 — Functional European Mn-Cr case-hardening steel with similar hardenability, no Ni — the usual EU substitute in gear practice.
8620 in GB/T (China)
- 20CrNiMo — Identical GB/T 3077 20CrNiMo: C 0.17–0.23, Ni 0.35–0.75, Cr 0.40–0.70, Mo 0.20–0.30.
8620 in JIS (Japan)
- SNCM220 — Identical JIS G4053 SNCM220: C 0.17–0.23, Ni 0.40–0.70, Cr 0.40–0.65, Mo 0.15–0.30.
8620 in AISI / SAE
- 8615 / 8617 / 8622 — Near Carbon steps of the 86xx family (0.15, 0.17, 0.22 % C) for lighter or heavier cores.
- 4320 / 18CrNiMo7-6 — Functional Higher-Ni grades (1.8 / 1.5 % Ni) for larger, more heavily loaded gears.
- 1018 / C15 — Functional Unalloyed case-hardening steels for small, lightly loaded parts.
8620 in GOST (Russia/CIS)
- 20KhGNM / 20KhN2M — Near GOST 4543 20KhGNM (C 0.18–0.23, Ni 0.40–0.70, Cr 0.40–0.70, Mo 0.15–0.25) is the closest Russian match.
Superseded names for 8620
- G86200 / H86200 — UNS: 8620H = hardenability-guaranteed version, standard for gears.
- 21NiCrMo2 / 20NiCrMo2-2 / 1.6523 — EN 10084 / DIN 17210: European twin.
- 805M20 / 805A20 / EN362 — BS 970: EN362 still used in the UK/India.
- SNCM220 — JIS G4053: Formerly SNCM21.
- 20CrNiMo — GB/T 3077: Chinese twin.
Key data for 8620
Full composition, mechanical properties by thickness, heat treatment and applications for 8620 →
Verified against ASTM A29/A29M-20 (SAE J404 chemistry). Last checked: September 2026.