17-4PH Stainless Steel Hex Bar
Stellanox Steel supplies high-performance 17-4PH Stainless Steel Hex Bars, engineered for strength-critical applications that demand excellent mechanical properties, corrosion resistance, and dimensional stability. As a precipitation-hardening martensitic stainless steel, 17-4PH hex bars are widely used in aerospace, marine, nuclear, and industrial equipment that requires strength, reliability, and wear resistance in a compact, hexagonal profile.
These bars are valued for their excellent strength-to-weight ratio and corrosion resistance in both annealed and heat-treated conditions.
What is 17-4PH Stainless Steel Hex Bar?
17-4PH Stainless Steel Hex Bar is a six-sided bar made from chromium-nickel-copper stainless steel with niobium (columbium) added for precipitation hardening. Through controlled aging (H900, H1025, H1150), this alloy can achieve very high strength, hardness, and corrosion resistance.
It is magnetic and offers a unique combination of mechanical and chemical resistance—making it ideal for tight-tolerance, high-load applications.
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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: Can be aged to desired hardness and strength levels.
- High Tensile and Yield Strength: Excellent for structural and load-bearing uses.
- Corrosion Resistant: Performs well in most environments, comparable to 304.
- Magnetic in All Conditions: Suitable for electrical and magnetic components.
- Machinable and Weldable: Especially in solution-annealed condition.
- Dimensional Stability: Maintains tolerance during heat treatment.
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
2025 Stellanox Steel |