4130 equivalent grades: ASTM, EN, JIS, GB, DIN
Cross-reference for 4130 across standard systems. Each match is graded so you can see how safe the substitution is. Chromium-molybdenum low-alloy steel, weldable (chromoly) — full 4130 data sheet.
Cross-reference table
| Grade | System | Match | Why / differences |
|---|---|---|---|
| 30CrMo4 | EN (European) | Identical | Former DIN 17200 / SEW grade (C 0.26–0.34) — an exact match but no longer in EN 10083-3; still produced by some mills. |
| 30CrMo | GB/T (China) | Identical | GB/T 3077 30CrMo: C 0.26–0.34, Cr 0.80–1.10, Mo 0.15–0.25. |
| 30KhMA | GOST (Russia/CIS) | Identical | GOST 4543 30KhMA: C 0.26–0.33, Cr 0.80–1.10, Mo 0.15–0.25 — used for Russian aircraft tube. |
| SCM430 | JIS (Japan) | Identical | JIS G4053 SCM430: C 0.28–0.33, Cr 0.90–1.20, Mo 0.15–0.30. |
| 4140 | AISI / SAE | Near | 0.40 % C: higher strength and hardenability, much poorer weldability. |
| 4135 | AISI / SAE | Near | Intermediate 0.35 % C grade (API 6A wellhead forgings). |
| 708A30 (EN18) | BS (superseded British) | Near | BS 970 708A30: C 0.28–0.33, Cr 0.85–1.15, Mo 0.15–0.25. |
| 25CrMo4 | EN (European) | Near | 1.7218: C 0.22–0.29, Cr 0.90–1.20, Mo 0.15–0.30 — carbon just below 4130's 0.28–0.33; the standard European substitute for tube and bar. |
| 1026 / E4130 | AISI / SAE | Functional | Plain-carbon DOM tube (1026) is the budget substitute for non-critical tube structures. |
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.
4130 in EN (European)
- 30CrMo4 — Identical Former DIN 17200 / SEW grade (C 0.26–0.34) — an exact match but no longer in EN 10083-3; still produced by some mills.
- 25CrMo4 — Near 1.7218: C 0.22–0.29, Cr 0.90–1.20, Mo 0.15–0.30 — carbon just below 4130's 0.28–0.33; the standard European substitute for tube and bar.
4130 in GB/T (China)
- 30CrMo — Identical GB/T 3077 30CrMo: C 0.26–0.34, Cr 0.80–1.10, Mo 0.15–0.25.
4130 in GOST (Russia/CIS)
- 30KhMA — Identical GOST 4543 30KhMA: C 0.26–0.33, Cr 0.80–1.10, Mo 0.15–0.25 — used for Russian aircraft tube.
4130 in JIS (Japan)
- SCM430 — Identical JIS G4053 SCM430: C 0.28–0.33, Cr 0.90–1.20, Mo 0.15–0.30.
4130 in AISI / SAE
- 4140 — Near 0.40 % C: higher strength and hardenability, much poorer weldability.
- 4135 — Near Intermediate 0.35 % C grade (API 6A wellhead forgings).
- 1026 / E4130 — Functional Plain-carbon DOM tube (1026) is the budget substitute for non-critical tube structures.
4130 in BS (superseded British)
- 708A30 (EN18) — Near BS 970 708A30: C 0.28–0.33, Cr 0.85–1.15, Mo 0.15–0.25.
Superseded names for 4130
- G41300 — UNS: 4130H = H41300.
- 25CrMo4 / 1.7218 — EN 10083-3: Nearest European grade (C slightly lower); 30CrMo4 (DIN 17200) was closer.
- 708A30 / EN18 — BS 970
- SCM430 — JIS G4053
- MIL-T-6736 / AMS 6360 — US military / SAE Aerospace: Aircraft tubing specifications.
Key data for 4130
Full composition, mechanical properties by thickness, heat treatment and applications for 4130 →
Verified against ASTM A29/A29M-20 (SAE J404 chemistry). Last checked: September 2026.