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Standard Stainless Steel 17-4PH (UNS S17400) piping and mechanical tubing are critical solutions for applications requiring high stress thresholds and fatigue resistance. Commonly specified in aerospace structural components, offshore oil & gas valves, chemical processing equipment, and pump shafts, 17-4PH can be heat-treated to various tempers (such as H900, H1025, or H1150) to achieve the precise balance of strength and toughness demanded by specific engineering designs.
| Product Form | Outer Diameter (OD) | Wall Thickness (WT) | Standard Length |
|---|---|---|---|
| Seamless Tubing / Heavy Wall | 10.3mm – 273.0mm (1/8" – 10") | 1.65mm – 40.0mm | 6m / Fixed Length |
| Welded Pipe (Customized) | 21.3mm – 610.0mm (1/2" – 24") | 2.0mm – 25.0mm | 6m / Cut-to-length |
| Hollow Bar / Machined Pipe | 32.0mm – 350.0mm | 5.0mm – 50.0mm | Random 3m - 6m |
| Element | Cr | Ni | Cu | Nb (Cb) | C | Mn | Si | P | Fe |
|---|---|---|---|---|---|---|---|---|---|
| Min. | 15.0 | 3.00 | 3.00 | 0.15 | - | - | - | - | Bal. |
| Max. | 17.5 | 5.00 | 5.00 | 0.45 | 0.070 | 1.00 | 1.00 | 0.040 | Bal. |
| Tensile Strength Rm (MPa) | Yield Strength Rp0.2 (MPa) | Elongation A5 (%) | Hardness (HB / HRC) | Density (g/cm³) | PREN Index |
|---|---|---|---|---|---|
| ≥ 1310 | ≥ 1170 | ≥ 10 | ≥ 388 HB (40 HRC) | 7.80 | ~ 16.0 |
