4130 equivalent grades: ASTM, EN, JIS, GB, DIN
4130 is chromium-molybdenum low-alloy steel, weldable (chromoly) specified in ASTM A29. 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 4130 data sheet carries the composition and mechanical tables.
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4130 is cross-certified with 30CrMo4, 30CrMo, 30KhMA and 1 more: the composition windows overlap closely enough that one certificate satisfies the other. 4140, 4135, 708A30 (EN18) and 1 more differ on one limit only — a carbon ceiling, an impact temperature or a strength minimum. 1026 / E4130 serves 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that is 2 in EN (European), 1 in GB/T (China), 1 in GOST (Russia/CIS), 1 in JIS (Japan), 3 in AISI / SAE, 1 in BS (superseded British).
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| 708A30 (EN18) | BS (superseded British) | Near | BS 970 708A30: C 0.28–0.33, Cr 0.85–1.15, Mo 0.15–0.25.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, near and functional are defined once on the grade index; the reason column below says which limit differs in each case.
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.