High-Strength Precipitation Hardening Stainless Steel Fasteners for Aerospace, Marine & Chemical Industries
We are a trusted manufacturer and supplier of 17-4PH precipitation-hardening stainless steel stud bolts and hex nuts, produced according to international fastener standards.
Grade 17-4PH (UNS S17400 / SUS 630) is one of the highest-strength stainless steels, offering exceptional mechanical properties, excellent corrosion resistance, and remarkable toughness in both ambient and high-temperature applications.
17-4PH fasteners are widely used in aerospace, offshore, petrochemical, turbines, high-pressure equipment, and precision engineering components that require high strength-to-weight ratio and superior corrosion performance.
What Is 17-4PH / S17400 / SUS 630?
17-4PH, also known as S17400 or SUS 630, is a chromium-nickel-copper precipitation-hardening stainless steel. It combines the high strength of alloy steels with the corrosion resistance of stainless steels.
- UNS Number: S17400
- WNR: 1.4542
- JIS: SUS 630
- Standard: ASTM A564 / A693 / AMS 5643,ASTM A1082
We can produce the 17-4ph,S17400 stud bolt according to ASTM A1082 standard.
It can be produced from 17-4PH round bar
17-4PH Stud Bolt & Hex Nut Specifications
| Item | Specification |
|---|---|
| Product Types | Stud bolts, threaded rods, hex nuts, washers |
| Sizes | M6 to M64 / ¼” to 2-½” |
| Threads | Metric, UNC, UNF, BSW, ACME |
| Standard | ASTM A1082 |
ASTM A1082
Standard Specification for High Strength Precipitation Hardening and Duplex Stainless Steel Bolting for Special Purpose Applications
Chemical Composition of S17400 as per ASTM A1082
Age hardening heat treatment and mechanical property of S17400 as per ASTM A1082
Material Names
- 17-4PH
- UNS S17400
- SUS 630 (Japanese standard)
- X5CrNiCuNb16-4 (EN 1.4542)
Heat Treatment Conditions (Typical)
17-4PH can be supplied in several conditions:
| Condition | Hardness | Tensile Strength | Notes |
|---|---|---|---|
| H900 | Highest hardness | Highest strength | Less ductile |
| H1025 | Balanced | Balanced | Most commonly used for fasteners |
| H1150 | Lower hardness | Better toughness | High-temperature use |
| H1150D | Double tempered | Superior stress corrosion performance | Offshore preferred |
UNS S17400 Stud Bolt Specifications
| Feature | Detail |
|---|---|
| Thread Type | Metric (M), UNC/UNF (Inch) |
| Thread Class | 6g/6H (metric), 2A/2B or 3A/3B (imperial) |
| Ends | Plain, chamfered, |
| Coatings | Plain or PTFE on request |
| Length Range | Typically up to 1 meter or custom |
Why select S17400 Fasterner?
Advantages of S17400 bolts
1. High strength
S17400 bolts have excellent strength and are able to withstand large tensile forces and pressures, which makes them excellent in a variety of high-load applications.
2. Strong corrosion resistance
Its unique alloy composition allows S17400 bolts to exhibit good durability in wet or chemically corrosive environments, reducing replacement and maintenance costs due to corrosion.
3. Good processability
S17400 material can still maintain good processing performance after suitable heat treatment, which is convenient for cutting and forming in the manufacturing process.
Why us?
ISO 9001, EN 10204 3.1 / 3.2, NACE MR0175 certification
100% PMI,
Looking for a reliable 17-4PH stud bolt and hex nut manufacturer,pls contact us for pricing.
Order Example
Stud Bolts:
17-4PH (S17400) Stud Bolt
M20 × 120 mm, Full Thread
Condition: H1025
Standard: ASTM A193 (Custom)
Qty: 500 pcs
Certificate: EN 10204 3.1
Hex Nuts:
17-4PH Heavy Hex Nut
M20, H1025
Standard: ASTM A194
Qty: 500 pcs
