17-4PH Stainless Steel Hex Bar
Stellanox Steel offers premium 17-4PH stainless steel hex bars that are designed for applications requiring exceptional mechanical qualities, resistance to corrosion, and dimensional stability. 17-4PH hex bars, a precipitation-hardening martensitic stainless steel, are extensively utilised in industrial, nuclear, marine, and aerospace equipment that needs strength, dependability, and wear resistance in a small, hexagonal shape.
These bars are prized for their superior strength-to-weight ratio and ability to withstand corrosion under both heat-treated and annealed conditions.
What is 17-4PH Stainless Steel Hex Bar?
For precipitation hardening, niobium (columbium) is added to chromium-nickel-copper stainless steel to create the six-sided 17-4PH Stainless Steel Hex Bar. This alloy may acquire extremely high strength, hardness, and corrosion resistance through controlled ageing (H900, H1025, and H1150).
It is perfect for high-load, tight-tolerance applications since it is magnetic and provides a special blend of chemical and mechanical resistance.
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Stainless Steel |
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Carbon Steel |
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Duplex Stainless Steel |
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Super Duplex Stainless Steel |
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Alloy Steel |
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Titanium |
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Hastelloy |
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Inconel |
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Monel |
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Aluminium |
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Copper |
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Pure Nickel |
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Flanges |
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Forged Fittings |
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Valves |
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Fasteners |
Key Features of 17-4PH Stainless Steel Hex Bar
- Precipitation Hardened: Ages to the appropriate strength and hardness levels.
- High Yield and Tensile Strength: Outstanding for load-bearing and structural applications.
- Corrosion Resistant: Similar to 304, it works well in most conditions.
- Magnetic in EverySituation: Fit for both magnetic and electrical parts.
- Weldable and Machinable: Particularly when solution-annealed.
During heat treatment, dimensional stability preserves tolerance.
Specification Chart – 17-4PH Stainless Steel Hex Bar
| Property | Details |
|---|---|
| Grade | 17-4PH (UNS S17400) |
| Standards | ASTM A564, AMS 5643, EN 10088-3 |
| Size Range (Across Flats) | 6 mm – 75 mm |
| Length | Up to 6 meters or custom cut |
| Finishes | Bright, Peeled, Ground, Black |
| Conditions | Solution Annealed, H900, H1025, H1150 |
Chemical Composition – 17-4PH Stainless Steel Hex Bar
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 15.0 – 17.5 |
| Nickel (Ni) | 3.0 – 5.0 |
| Copper (Cu) | 3.0 – 5.0 |
| Columbium (Nb) + Ta | 0.15 – 0.45 |
| Carbon (C) | ≤ 0.07 |
| Manganese (Mn) | ≤ 1.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
Mechanical Properties – 17-4PH Stainless Steel Hex Bar (H900 Condition)
| Property | Value |
|---|---|
| Tensile Strength (MPa) | ≥ 1310 |
| Yield Strength (MPa) | ≥ 1170 |
| Elongation (%) | ≥ 10 |
| Hardness (HRC) | 40 – 47 |
| Density | 7.75 g/cm³ |
Equivalent Grades – 17-4PH Stainless Steel Hex Bar
| Standard | Grade |
|---|---|
| ASTM | 17-4PH |
| EN | 1.4542 |
| JIS | SUS 630 |
| UNS | S17400 |
| DIN | X5CrNiCuNb16-4 |
Applications of 17-4PH Stainless Steel Hex Bar
- Aerospace Structural Components
- High-Pressure Valve Parts
- Marine Propeller Shafts and Drive Systems
- Nuclear Reactor Parts
- Fasteners, Gears, and Couplings
- Tooling and Molding Components
Benefits of 17-4PH Stainless Steel Hex Bar
- Combines high strength and corrosion resistance in one alloy
- Suitable for high-load, high-wear, and fatigue-critical parts
- Maintains dimensional stability during heat treatment
- Magnetic and machinable in various conditions
- Excellent performance in marine, aerospace, and industrial systems
- Available in multiple aging tempers to suit application needs
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