17-4PH is a chromium-nickel-copper precipitation hardening martensitic stainless steel that combines oxidation and corrosion resistance comparable to 304 in most environments with high strength and hardness. It is the most widely used of all the precipitation hardening stainless steels, and is more cost effective than many high nickel non-ferrous alloys in some applications. 17-4PH cannot be used at temperatures above 300℃ and at cryogenic temperatures. It is magnetic.
Chinese designation: 17-4PH 沉淀硬化不锈钢
| Element | Min % | Max % |
|---|---|---|
| Cr | 15 | 17.5 |
| Ni | 3 | 5 |
| Cu | 3 | 5 |
| Mn | — | 1 |
| Si | — | 1 |
| Nb+Ta | 0.15 | 0.45 |
| C | — | 0.07 |
| P | — | 0.04 |
| S | — | 0.03 |
| Fe | balance | — |
Chemical composition per the grade specification. Values are nominal; the certified analysis is issued with every order on EN 10204 3.1 documentation.
| Product form | ASTM / EN specification |
|---|---|
| Rod, bar and shape | A 564, A 484 |
| Plate, sheet and strip | A 693, A 480 |
| Forging | A 705, A 484 |
17-4PH (Type 630, UNS S17400, DIN W. Nr. 1.4542) is a stainless steels grade. 17-4PH is a chromium-nickel-copper precipitation hardening martensitic stainless steel that combines oxidation and corrosion resistance comparable to 304 in most environments with high strength and hardness. It is the most widely used of all the precipitation hardening stainless steels, and is more cost effective than many high nickel non-ferrous alloys in some applications. 17-4PH cannot be used at temperatures abov
ROBAN supplies 17-4PH as rod, bar and shape, plate, sheet and strip, forging, with custom dimensions to your drawing.
Yes. Every order ships with EN 10204 3.1 material certification covering the actual heat analysis. 3.2 documentation is available where the contract requires it.
Stock items ship within 3 to 7 working days. Cut-to-size and forged items typically run 15 to 30 working days depending on quantity and specification. Send us your drawing or enquiry for a firm lead time.
Drawing, grade, dimensions, quantity and delivery date — we price from those.
Request a Quote →Heat analysis certificate issued with every order at no extra charge.
Quality documentation →Shearing, sawing and machining to the tolerances on your drawing.
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