17-4 PH equivalent grades: ASTM, EN, JIS, GB, DIN
Cross-reference for 17-4 PH across standard systems. Each match is graded so you can see how safe the substitution is. Martensitic precipitation-hardening stainless steel — full 17-4 PH data sheet.
Cross-reference table
| Grade | System | Match | Why / differences |
|---|---|---|---|
| 1.4542 | EN (European) | Identical | X5CrNiCuNb16-4 (EN 10088-3): same analysis; delivery conditions +P800/+P930/+P960/+P1070 correspond to H1150/H1075/H1025/H900. |
| 05Cr17Ni4Cu4Nb | GB/T (China) | Identical | GB/T 20878 05Cr17Ni4Cu4Nb (formerly 0Cr17Ni4Cu4Nb). |
| SUS630 | JIS (Japan) | Identical | JIS G4303 SUS630: C ≤ 0.07, Cr 15.5–17.5, Ni 3–5, Cu 3–5, Nb 0.15–0.45. |
| 15-5 PH | AISI / SAE | Near | S15500 / 1.4545: Cr 14–15.5, Ni 3.5–5.5 — vacuum-remelted, ferrite-free, better transverse ductility and toughness; often substituted in aerospace. |
| 07Kh16N4B / 09Kh16N4B | GOST (Russia/CIS) | Near | GOST martensitic Nb-bearing 16-4 grades without copper; the closest Russian analogues, not true PH steels. |
| 13-8 Mo | AISI / SAE | Functional | S13800: higher strength and toughness, more expensive; for critical aerospace parts. |
| 410 | AISI / SAE | Functional | Conventional martensitic 12 % Cr: cheaper, lower strength (≤ 1200 MPa), poorer corrosion resistance, needs quench hardening. |
| 316 | AISI / SAE | Functional | Austenitic: similar corrosion resistance, one-quarter of the yield strength; 17-4 replaces it where strength matters. |
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.
17-4 PH in EN (European)
- 1.4542 — Identical X5CrNiCuNb16-4 (EN 10088-3): same analysis; delivery conditions +P800/+P930/+P960/+P1070 correspond to H1150/H1075/H1025/H900.
17-4 PH in GB/T (China)
- 05Cr17Ni4Cu4Nb — Identical GB/T 20878 05Cr17Ni4Cu4Nb (formerly 0Cr17Ni4Cu4Nb).
17-4 PH in JIS (Japan)
- SUS630 — Identical JIS G4303 SUS630: C ≤ 0.07, Cr 15.5–17.5, Ni 3–5, Cu 3–5, Nb 0.15–0.45.
17-4 PH in AISI / SAE
- 15-5 PH — Near S15500 / 1.4545: Cr 14–15.5, Ni 3.5–5.5 — vacuum-remelted, ferrite-free, better transverse ductility and toughness; often substituted in aerospace.
- 13-8 Mo — Functional S13800: higher strength and toughness, more expensive; for critical aerospace parts.
- 410 — Functional Conventional martensitic 12 % Cr: cheaper, lower strength (≤ 1200 MPa), poorer corrosion resistance, needs quench hardening.
- 316 — Functional Austenitic: similar corrosion resistance, one-quarter of the yield strength; 17-4 replaces it where strength matters.
17-4 PH in GOST (Russia/CIS)
- 07Kh16N4B / 09Kh16N4B — Near GOST martensitic Nb-bearing 16-4 grades without copper; the closest Russian analogues, not true PH steels.
Superseded names for 17-4 PH
- Type 630 — AISI / ASTM: The numeric AISI designation for 17-4 PH.
- 1.4542 / X5CrNiCuNb16-4 — EN 10088-3: 1.4548 is the same steel for pressure purposes (EN 10088 older number / SEW).
- 17-4 PH — Armco trade name (1948): Precipitation Hardening; 15-5 PH, 13-8 Mo and Custom 450 are later relatives.
- AMS 5643 / 5604 / 5622 — SAE Aerospace: Bar/forgings, sheet, and consumable-remelted bar.
- CB7Cu-1 — ACI / ASTM A747: Cast equivalent.
Key data for 17-4 PH
Full composition, mechanical properties by thickness, heat treatment and applications for 17-4 PH →
Verified against ASTM A564/A564M-19. Last checked: September 2026.