Chemical Composition
| Element | Cr | Ni | Cu | Mn | Nb+Ta | Fe | |
| % Range | 15–17.5 | 3–5 | 3–5 | ≤1 | 0.15–0.45 | Bal. | 35 |
Mechanical Properties
- Tensile Strength: ≥1310 MPa (H900 temper)
- Yield Strength: ≥1172 MPa (H900 temper)
- Hardness: 388–444 HBW (H900 temper)
- Elongation: ≥10% 35
Physical Properties
- Density: 7.75 g/cm³
- Melting Range: 1400–1440°C 13
Types of Nuts Produced with 17-4PH
- Hex Nuts (ISO 4032 / DIN 934)
- Flange Nuts (ISO 7040)
- Lock Nuts (DIN 985)
- High-Strength Coupling Nuts (ANSI B18.2.2)
- Customizable threads: UNC, UNF, Metric 15
Applications Across Industries
- Aerospace:
- Jet engine components, turbine blades, and structural fasteners requiring high strength-to-weight ratios 67.
- Marine & Offshore:
- Fasteners for seawater-resistant platforms, helicopter decks, and shipbuilding 78.
- Chemical & Energy:
- Valves, pump shafts, and nuclear waste containment barrels exposed to corrosive media 35.
- Medical & Food Processing:
- Surgical instruments and hygienic equipment needing sterilization compatibility 67.
- 17-4PH nuts
- UNS S17400 fasteners
- High-strength stainless steel nuts
- ASTM A564 hex nuts
- DIN 1.4542 fasteners
- Aerospace-grade nuts
- Corrosion-resistant coupling nuts
- Precipitation-hardening stainless steel nuts
Heat Treatment & Machining
- Solution Annealing: 1038°C ± 14°C followed by rapid cooling 36.
- Precipitation Hardening:
- H900: 480°C aging → peak hardness (HRC 35–44) 13.
- Weldability: Compatible with TIG/MIG; post-weld heat treatment recommended 56.
Why Choose 17-4PH Nuts?
- Cost Efficiency: Combines strength of high-grade alloys with lower material costs 5.
- Versatility: Adaptable to harsh environments (corrosion, high stress, extreme temps) 67.
- 17-4PH Nuts: Aerospace Applications”).
- Explore 17-4PH bolts for offshore rigs”).
- 17-4PH Hex Nuts in Jet Engine Assembly”.
