Table of Contents
SS 15-5PH / 17-4PH Threaded Bars Overview
Aurum Overseas is a premier 15-5PH SS Threaded Bars Supplier and 17-4PH SS Threaded Bars Exporter, stocking high-strength precipitation-hardening stainless steel fasteners to ASTM A564 specifications. Engineered for extreme load-bearing applications, these studs achieve superior tensile strength through single-step thermal aging.
Our inventory includes certified UNS S17400 Threaded Rods and UNS S15500 Threaded Rods enriched with Chromium, Nickel, and Copper. The 17-4PH grade provides maximum structural strength, while 15-5PH offers refined, ferrite-free microstructure for enhanced transverse toughness.
Built for aerospace, nuclear, and high-pressure hydraulic systems, our studs ensure joint reliability under fatigue. Contact Aurum Overseas for factory quotes, custom heat treatments (H900–H1150), and fast global delivery.
Technical Specifications
| Technical Parameter | Specification Standard |
|---|---|
| Material Specifications | ASTM A564 Grade 630 (17-4PH) / Grade XM-12 (15-5PH), AMS 5643, AMS 5659 |
| UNS Designation | UNS S17400 (17-4PH) / UNS S15500 (15-5PH) |
| Thread Size Range | M6 to M100 (1/4" to 4.0" Nominal Diameter) |
| Thread Profiles | UNC, UNF, UNEF, Metric Coarse, Metric Fine, Acme Threads |
| Length Options | 1,000 mm, 2,000 mm, 3,000 mm, Custom Cut-to-Length All-Thread Studs |
| Heat Treatment States | Solution Annealed (Condition A), H900, H1025, H1050, H1150, H1150D |
| HSN Code | 73181500 |
Chemical Composition & Mechanical Properties
Equivalent Standards
| Grade | Standard | UNS Designation | Werkstoff Number |
|---|---|---|---|
| 17-4PH | ASTM A564 | S17400 | 1.4542 |
| 15-5PH | ASTM A564 | S15500 | 1.4545 |
Chemical Composition (%)
| Chemical Element | 17-4PH (UNS S17400) | 15-5PH (UNS S15500) |
|---|---|---|
| Chromium (Cr) | 15.00 – 17.50 | 14.00 – 15.50 |
| Nickel (Ni) | 3.00 – 5.00 | 3.50 – 4.50 |
| Copper (Cu) | 3.00 – 5.00 | 2.50 – 4.50 |
| Niobium + Tantalum (Nb+Ta / Cb) | 0.15 – 0.45 | 0.45 max |
| Molybdenum (Mo) | — | 0.50 max |
| Carbon (C) | 0.07 max | 0.07 max |
| Manganese (Mn) | 1.00 max | 1.00 max |
| Silicon (Si) | 1.00 max | 1.00 max |
| Phosphorus (P) | 0.04 max | 0.03 max |
| Sulfur (S) | 0.03 max | 0.015 max |
| Iron (Fe) | Balance | Balance |
Mechanical & Physical Properties
| Property Parameter | 17-4PH (UNS S17400) | 15-5PH (UNS S15500) |
|---|---|---|
| Density | 7.75 g/cm³ | 7.75 g/cm³ |
| Ultimate Tensile Strength (Min) | 1103 MPa (160 Ksi) | 1103 MPa (160 Ksi) |
| Yield Strength (0.2% Offset, Min) | 1000 MPa (145 Ksi) | 1000 MPa (145 Ksi) |
| Elongation (Min) | 10 % | 10 % |
| Hardness (Condition H900) | ~40–45 HRC | ~40–45 HRC |
Key Advantages of 15-5PH & 17-4PH Threaded Rods
Tailored High Tensile Strength
Thermal precipitation hardening (H900–H1150) yields tensile strength over 1100 MPa to withstand extreme structural loads.
Isotropic Transverse Toughness (15-5PH)
Consumable electrode remelting in 15-5PH removes directional ferrite stringers, ensuring cross-directional impact resistance.
Copper-Rich Microstructure
Sub-microscopic copper precipitates increase core hardness without causing high-temperature embrittlement.
Controlled Thermal Expansion
Low thermal expansion coefficient maintains clamped tension across cyclic industrial temperatures without bolt loosening.
Quality Testing & Inspection
Aurum Overseas subjects every lot to rigorous testing to verify compliance with international aerospace and industrial standards:
- Positive Material Identification (PMI): XRF/Spectro chemical testing verifying Copper, Niobium, Chromium, and Nickel ratios per ASTM A564 specs.
- Dimensional & Thread Pitch Verification: Thread micrometer and Go/No-Go gage testing ensuring precise 2A/3A and 6g fit tolerances.
- Mechanical & Hardness Testing: Tensile, yield, elongation, and Rockwell C hardness testing mapped to specific heat-treatment conditions (H900/H1150).
- Non-Destructive Testing (NDT): Ultrasonic and magnetic particle testing available upon customer request to verify micro-structural integrity.
Global Export Markets
As an established 15-5PH SS Threaded Bars Supplier and 17-4PH SS Threaded Bars Exporter, Aurum Overseas supplies fully certified ASTM A564 UNS S15500 and UNS S17400 threaded rods to global aerospace, nuclear, hydraulic, and industrial facilities:
USA
Canada
Mexico
Germany
United
Kingdom
France
Italy
Netherlands
Belgium
Spain
Poland
UAE
Saudi
Arabia
Qatar
Kuwait
Oman
Bahrain
Frequently Asked Questions
15-5PH is a ferrite-free, remelted variant of 17-4PH that offers better transverse toughness and mechanical uniformity across thick cross-sections.
These designations represent aging temperatures in Fahrenheit; H900 provides maximum strength and hardness, while H1150 offers higher ductility and fracture toughness.
They are used in aerospace structural fasteners, high-pressure pump shafts, valve actuators, hydraulic tie-rods, and paper mill equipment.
Yes. As a 15-5PH SS Threaded Bars Exporter, we supply orders across the UAE, Saudi Arabia, Qatar, Oman, Kuwait, and Bahrain.
Yes. As a 17-4PH SS Threaded Bars Supplier, we supply certified threaded rods across the USA, Canada, Germany, the UK, and Europe.
Contact Aurum Overseas
Contact Aurum Overseas, a premier 15-5PH SS Threaded Bars Supplier and 17-4PH SS Threaded Bars Exporter, for certified ASTM A564 threaded rods, cut-to-length studs, and fast global shipping.