17-4PH Stainless Steel Flat Bar
High-performance 17-4PH stainless steel flat bars, renowned for their remarkable mechanical strength, hardness, and resistance to corrosion, are supplied by Stellanox Steel. 17-4PH flat bars, a precipitation-hardened martensitic stainless steel, are utilised in high-pressure, chemical, aerospace, and marine settings where durability, strength, and dimensional stability are essential.
These flat bars can be heat-treated to achieve strength levels of up to 1300 MPa, are magnetic, and are easily machinable under solution-annealed conditions.
What is 17-4PH Stainless Steel Flat Bar?
The rectangular solid bar known as the 17-4PH Stainless Steel Flat Bar is composed of a chromium-nickel-copper stainless steel alloy that has been precipitation-hardened with niobium (columbium). Age-hardening to different tempers (H900 to H1150) allows for mechanical performance flexibility. This grade is perfect for heavy-duty structural applications and precise components because it combines strength, toughness, and corrosion 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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Hastelloy |
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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 Flat Bar
- Precipitation Hardenable: Through ageing procedures, this material achieves exceptionally high strength.
- High Tensile Strength and Yield: Ideal for parts that can withstand loads and wear.
- Outstanding Corrosion Resistance: Functions effectively in environments that are both industrial and marine.
- Dimensional Stability: Minimal deformation after heat treatment and machining.
- Perfect for high-precision magnetic applications, magnetic in all conditions.
- Properties That Can Be Customised: H900, H1025, and H1150 conditions are available.
Specification Chart – 17-4PH Stainless Steel Flat Bar
| Property | Details |
|---|---|
| Grade | 17-4PH (UNS S17400) |
| Standards | ASTM A564, AMS 5643, EN 10088-3 |
| Thickness Range | 6 mm – 50 mm |
| Width Range | 20 mm – 300 mm |
| Length | Up to 6 meters or custom cut |
| Finish | Bright, Peeled, Polished, Black |
| Condition | Solution Annealed, H900, H1025, H1150 |
Chemical Composition – 17-4PH Stainless Steel Flat Bar
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 15.0 – 17.5 |
| Nickel (Ni) | 3.0 – 5.0 |
| Copper (Cu) | 3.0 – 5.0 |
| Niobium + Tantalum | 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 Flat 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 Flat Bar
| Standard | Grade |
|---|---|
| ASTM | 17-4PH |
| EN | 1.4542 |
| JIS | SUS 630 |
| UNS | S17400 |
| DIN | X5CrNiCuNb16-4 |
Applications of 17-4PH Stainless Steel Flat Bar
- Aerospace Brackets, Supports, and Shafts
- Marine and Offshore Load-Bearing Components
- Pump and Valve Bodies
- Nuclear Reactor Parts and Waste Containers
- High-Pressure Hydraulic Fittings
- Tooling, Molds, and Fixtures
Benefits of 17-4PH Stainless Steel Flat Bar
- Extremely high strength and hardness
- Magnetic and machinable
- Corrosion-resistant in industrial and marine conditions
- Minimal distortion during heat treatment
- Adaptable to various tempering conditions
- Ideal for structural, aerospace, and defense-grade systems
2025 Stellanox Steel |