17-4 PH Stainless Steel Fasteners Supplier
MT.BOLTS manufactures 17-4 PH stainless steel fasteners using high-quality precipitation-hardening stainless steel. These fasteners provide high strength, excellent mechanical properties, and good corrosion resistance, especially in mildly corrosive environments and applications requiring elevated strength and hardness. They are ideal for use in aerospace, marine hardware, chemical processing, power generation, and high-performance mechanical systems.
Our 17-4 PH stainless steel fasteners are available in the following specifications:
- Diameter: M3 to M64 | #4 to 2.5″
- Length: 6mm to 500mm | 0.25″ to 20″
- Thread Pitch: Metric (Coarse/Fine) | UNC/UNF
- Standards: ASME B18.2.1, ASME B18.3, ASME B18.2.2, DIN/ISO/EN (e.g., DIN 933, DIN 934)
- Material Specifications: ASTM A564 / A693 (17-4 PH in various heat-treated conditions such as H900, H1025, H1150)
- Types: Bolts, Screws, Nuts, Washers, Studs
These fasteners are magnetic, heat-treatable, and ideal for applications requiring high tensile strength and stress corrosion cracking resistance.
17-4 PH Stainless Steel Fasteners and Bolts – Grades, Composition & Properties
We regularly supply 17-4 PH stainless steel fasteners and bolts for demanding applications requiring a combination of high strength, corrosion resistance, and reliable performance under mechanical stress and elevated temperatures. This precipitation-hardening stainless steel is widely used in aerospace, petrochemical, marine, and high-performance mechanical systems.
| Grade | UNS Number | Key Characteristics |
| 17-4 PH | S17400 | Precipitation-hardening stainless steel offering excellent strength, good corrosion resistance, and hardness after heat treatment (H900–H1150 conditions). Suitable for high-strength and moderate-corrosion environments. |
17-4 PH Stainless Steel Fasteners – Chemical Composition
| Element | C | Cr | Ni | Cu | Nb + Ta | Mn | Si | P | S |
| 17-4 PH | ≤ 0.07% | 15.0–17.5% | 3.0–5.0% | 3.0–5.0% | 0.15–0.45% | ≤ 1.00% | ≤ 1.00% | ≤ 0.040% | ≤ 0.030% |
17-4 PH Stainless Steel Fasteners – Mechanical Properties (Typical)
17-4 PH must be aged (heat treated) to develop high mechanical properties. The most common conditions are H900, H1025, and H1150, which influence hardness, tensile strength, and toughness.
| Property | H900 | H1025 | H1150 |
| Tensile Strength | ~ 1310 MPa (190 ksi) | ~ 1170 MPa (170 ksi) | ~ 1035 MPa (150 ksi) |
| Yield Strength | ~ 1180 MPa (170 ksi) | ~ 1070 MPa (155 ksi) | ~ 965 MPa (140 ksi) |
| Elongation (%) | ~10% | ~12% | ~16% |
| Hardness (HRC) | ~ 44 | ~ 38 | ~ 33 |
| Service Temp Range | Up to 316°C (600°F) | Up to 316°C (600°F) | Up to 316°C (600°F) |
17-4 PH Stainless Steel Fasteners Types
MT.BOLTS offers a comprehensive range of 17-4 PH Stainless Steel Fasteners for your selection to meet various application requirements:
17-4 PH Stainless Steel Hex Head Lag Screws
17-4 PH Stainless Steel Curved Washers
17-4 PH Stainless Steel Wave Washers
17-4 PH Stainless Steel Belleville Washers
Why Choose MT.BOLTS
- Material Diversity
- Standardized Production
- Ample Inventory
- Competitive Pricing
- Low-MOQ Customization
Reasons to Choose 17-4 PH Stainless Steel Fasteners
- High strength and hardness due to precipitation hardening.
- Excellent corrosion resistance in many environments, including mildly corrosive and marine atmospheres.
- Good mechanical properties at elevated temperatures up to about 600°F (316°C).
- Magnetic properties for applications requiring magnetic materials.
- Good machinability and moderate weldability with appropriate post-weld heat treatment.
- Long service life in demanding industrial applications.
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Application of 17-4 PH Stainless Steel Fasteners
- Aerospace and defense components.
- Chemical and petrochemical processing equipment.
- Marine hardware and offshore structures.
- Power generation and turbine components.
- High-performance machinery and automotive parts.
- Valve and pump components subject to high mechanical stress.
FAQ About 17-4 PH Stainless Steel Fasteners and Bolts
It’s a precipitation-hardening stainless steel offering much higher strength and hardness compared to common austenitic stainless steels like 304 or 316.
Yes, but welding typically requires post-weld heat treatment to restore mechanical properties.
Common conditions include H900, H1025, and H1150, balancing strength and toughness for different needs.
Yes, unlike austenitic stainless steels, 17-4 PH is magnetic.
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