17-4 PH(630) Stainless Steel
WLD Steel is a leading manufacturer, supplier and exporter of the precipitated hardening stainless steel 17-4 available in a number of different sizes and forms including bar, rod, plate and sheets. We mainly stock 17-4 in Annealing condition. 17-4 PH is a registered trademark form AK Steel Holding, that’s 630 precipitated hardenings Martensitic stainless steel with copper addition. It’s characterized by high strength, good corrosion resistance and cutting performance, a higher hardness is obtained through different This hardening treatment. Its tensile strength can reach up to 1100~1300MPa can be further strengthened through aging treatment, suitable for manufacturing parts with high acid corrosion resistance such as aircraft and gas turbines, nuclear reactors, paper mills, oil fields and chemical process parts. It not suggested being used at temperatures above 300°.
What’s the 17-4 PH stainless steel available forms and specifications at WLD Steel?
- Sheet/Plate: ASTM A240, ASTM A480, ASTM A 693 / ASME SA 693
- Round Bar: ASTM A276, ASTM A479, ASTM A 564/ASME SA 564
17-4PH Steel Equivalent Grades
| Standard | UNS | JIS | DIN | EN | GB |
| SS 630 | S17400 | SUS630 | 1.4548 | X5CrNiCuNb16-4 | 0Cr17Ni4Cu4Nb |
17-4PH Steel Chemical Composition
| C | Si | Mn | P | S | Cr | Ni | Cu | Nb |
| ≤0.07 | ≤1.00 | ≤1.00 | ≤0.040 | ≤0.030 | 15.00-17.00 | 3.0-5.0 | 3.0-5.0 | 0.15-0.45 |
17-4PH Steel Mechanical Properties
| Heat treatment | Tensile strength (MPa) | Yield strength (MPa) | Elongation,(%) | Hardness, HBW |
| Hardening 480 ºC | 1180 | 1310 | 10 | ≤363 |
| Hardening 550 ºC | 1000 | 1070 | 12 | ≥331 |
| Hardening 580 ºC | 865 | 1000 | 13 | ≥302 |
| Hardening 620 ºC | 725 | 930 | 16 | ≥277 |
