17-4 PH equivalent grades: ASTM, EN, JIS, GB, DIN
17-4 PH is martensitic precipitation-hardening stainless steel specified in ASTM A564. Every grade in the database that can stand in for it is listed below, drawn from 5 standard systems, each with the reason it does or does not match exactly. The full 17-4 PH data sheet carries the composition and mechanical tables.
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17-4 PH is cross-certified with 1.4542, 05Cr17Ni4Cu4Nb, SUS630: the composition windows overlap closely enough that one certificate satisfies the other. 15-5 PH, 07Kh16N4B / 09Kh16N4B sit one step away, differ in a strength minimum or in the quality class rather than in the metallurgy. 13-8 Mo, 410, 316 serve in the same applications, but the composition differs enough that the engineer signs it off, not the buyer. Counted by system: 1 in EN (European), 1 in GB/T (China), 1 in JIS (Japan), 4 in AISI / SAE, 1 in GOST (Russia/CIS).
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, near and functional are defined once on the grade index; the reason column below says which limit differs in each case.
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.