17-4PH (UNS S17400) is a precipitation-hardening martensitic stainless steel that provides a unique combination of high strength, hardness, and corrosion resistance. These properties make it a popular choice for components that require both mechanical performance and dimensional accuracy.
Typical Chemical Composition (wt%)
| Element | C | Cr | Ni | Cu | Nb | Mn | Si |
|---|---|---|---|---|---|---|---|
| Content | ≤0.07 | 15.0–17.5 | 3.0–5.0 | 3.0–5.0 | 0.15–0.45 | ≤1.0 | ≤1.0 |
Mechanical Properties (H900 Condition)
| Property | Typical Value |
|---|---|
| Tensile Strength | ~1310 MPa |
| Yield Strength | ~1170 MPa |
| Hardness | ~44 HRC |
| Elongation | ~10% |
Why It’s Suitable for Precision Parts
| Factor | Performance |
|---|---|
| Dimensional Stability | Maintains tight tolerances after heat treatment |
| Machinability | Good in solution-annealed or aged conditions |
| Corrosion Resistance | Resists rust and oxidation in most environments |
| Strength-to-Weight Ratio | High, useful for aerospace and structural parts |
Common Precision Applications
| Industry | Parts |
|---|---|
| Aerospace | Flight control rods, gear shafts |
| Medical Devices | Surgical tooling, orthopedic instruments |
| Industrial Tools | Precision fixtures, pump components |
| Automotive | Transmission valves, fuel system parts |
17-4PH stainless steel bar is a reliable material for manufacturing high-precision, high-strength components due to its excellent mechanical performance and dimensional stability. For consistent quality, custom sizes, and export-ready service, Tongyi Metal is your trusted supplier of 17-4PH stainless steel bars.
