Table of Contents
- Stainless Steel 17-4 PH Nuts Overview
- Stainless Steel 17-4 PH Nuts Specifications
- What are Stainless Steel 17-4 PH Nuts?
- Stainless Steel 17-4 PH Technical Properties & Composition
- Why Industries Prefer Stainless Steel 17-4 PH Series Nuts
- Types of Stainless Steel 17-4 PH Series Nuts
- Key Advantages of UNS S17400 Series Nuts
- Key Applications of UNS S17400 Series Nuts
- Stainless Steel 17-4 PH Nuts vs 316 Stainless Steel Nuts
- Quality Testing & Inspection
- Global Export Markets
- Frequently Asked Questions
- Contact Aurum Overseas
Stainless Steel 17-4 PH Nuts Overview
Aurum Overseas is a premier Stainless Steel 17-4 PH Nuts Supplier and specialized Stainless Steel 17-4 PH Nuts Exporter. Grade 17-4 PH (UNS S17400 / 1.4542) is a chromium-copper precipitation-hardening martensitic stainless steel engineered to combine high yield strength with exceptional fatigue resistance and moderate corrosion protection.
Manufactured under strict ASTM A564 and AMS 5643 specifications, these fasteners undergo thermal aging treatments (such as H900, H1025, or H1150) to achieve tensile strengths up to 1310 MPa. As an international Stainless Steel 17-4 PH Nuts Exporter, Aurum Overseas delivers high-integrity, fully certified bolting systems across the USA, Germany, UK, UAE, Saudi Arabia, and Qatar.
Stainless Steel 17-4 PH Nuts Specifications
| Parameter | Specification / Technical Range |
|---|---|
| Material Grade | Stainless Steel 17-4 PH / UNS S17400 / Grade 630 |
| UNS Number | UNS S17400 |
| Werkstoff Number | 1.4542 |
| Manufacturing Standards | ASTM A564, ASME SA564, AMS 5643, DIN 934, ISO 4032 |
| Size Range | M3 to M100 | 3/16" to 4" | Custom Sizes Available |
| Length Range | 3 mm to 200 mm | Custom Lengths Available |
| Thread Configuration | ASME B1.1 2A/3A - 2B/3B Unified (UNC, UNF) & B1.13M 6h-6G Metric |
| Special Fastener Formats | 17-4 Ph SS Hex Head Nuts, 17-4 Ph SS Square Nuts, 17-4 Ph SS T Nuts, 17-4 Ph SS Eye Nuts |
| Heat Treatment Conditions | Condition A (Solution Annealed), H900, H1025, H1075, H1150, H1150-D |
| Certifications | EN 10204 3.1 Material Test Certificate, NACE MR0175 / ISO 15156 Compliant |
What are Stainless Steel 17-4 PH Nuts?
Stainless Steel 17-4 PH (UNS S17400 / 1.4542) nuts are martensitic precipitation-hardening fasteners alloyed with 15.0%–17.5% chromium, 3.0%–5.0% nickel, and 3.0%–5.0% copper. They provide ultra-high mechanical yield strengths (up to 1170 MPa in H900 condition) alongside corrosion resistance comparable to 304 stainless steel in most ambient and chemical processing conditions.
Stainless Steel 17-4 PH Technical Properties & Composition
The chemical composition and mechanical properties of SS 17-4 PH are precisely engineered to deliver ultra-high tensile strength through thermal aging, combined with reliable atmospheric corrosion resistance and exceptional fatigue performance in demanding aerospace, subsea, and industrial service environments.
Chemical Composition of SS 17-4 PH Nuts (%)
| Element | Percentage |
|---|---|
| Carbon (C) | 0.070 max |
| Chromium (Cr) | 15.0 - 17.5 |
| Nickel (Ni) | 3.0 - 5.0 |
| Copper (Cu) | 3.0 - 5.0 |
| Manganese (Mn) | 1.0 max |
| Silicon (Si) | 1.0 max |
| Phosphorus (P) | 0.040 max |
| Sulfur (S) | 0.030 max |
| Tantalum (Ta) | 0.45 max |
| Niobium (Nb, Cb) | 0.45 max |
| Niobium + Tantalum (Nb + Ta) | 0.15 - 0.45 |
| Iron (Fe) | 73 balance |
Mechanical Properties of Stainless Steel 17-4 PH Nuts
| Property / Parameter | Value / Technical Range |
|---|---|
| Density | 7.75 g/cm³ |
| Melting Point | 1404°C - 1440°C (2560°F - 2625°F) |
| Tensile Strength (H900) | 1310 MPa (190,000 psi) min |
| Yield Strength 0.2% Proof (H900) | 1170 MPa (170,000 psi) min |
| Elongation (% in 50mm) | 10% min |
| Hardness (H900) | 40 HRC / 388 HB min |
Equivalent Grades of Stainless Steel 17-4 PH Hex Nuts
| Standard | Werkstoff Nr. | UNS | JIS | EN |
|---|---|---|---|---|
| SS 17-4PH | 1.4542 | S17400 | SUS 630 | X5CrNiCuNb16.4 |
Why Industries Prefer Stainless Steel 17-4 PH Series Nuts
Aerospace, defense, and heavy machinery engineers specify UNS S17400 nuts when applications demand extreme tensile and shear strength without using lower-corrosion carbon steels.
Through low-temperature thermal aging (480°C to 620°C), 17-4 PH stainless steel achieves high hardness and yield strength up to 1170 MPa without scaling distortion or micro-cracking. As a dedicated Stainless Steel 17-4 PH Nuts Supplier, Aurum Overseas supplies these high-integrity, heat-treated fasteners to pump valve, drive shaft, and aerospace actuator manufacturers worldwide.
Types of Stainless Steel 17-4 PH Series Nuts
Aurum Overseas supplies a comprehensive range of stainless steel nut configurations manufactured according to standard DIN, ASME, and ISO dimensional tolerances for multiple engineering assemblies.
SS 17-4 Ph Hex Head Nuts
SS 17-4 Ph Square Nuts
SS 17-4 Ph Lock Nuts
SS 17-4 Ph Eye Nuts
SS 17-4 Ph Wing Nuts
SS 17-4 Ph T Nuts
SS 17-4 Ph Panel Nuts
SS 17-4 Ph Coupling Nuts
SS 17-4 Ph Dome Nuts
Key Advantages of UNS S17400 Series Nuts
Ultra-High Tensile Performance
Thermal aging delivers yield strengths exceeding 1170 MPa, ideal for high-stress applications.
Low-Temperature Heat Treatment
Simple single-step thermal treatment at moderate temperatures minimizes scaling and dimensional distortion during heat treating.
Superior Shear Strength
High shear capability makes these fasteners suitable for high-vibration aerospace and offshore connections.
Good Atmospheric Resistance
Chromium-copper matrix offers atmospheric corrosion resistance equivalent to Type 304 in non-marine environments.
Controlled Hardness Levels
Available in H1150 and double H1150 conditions to comply with NACE MR0175 sulfide stress cracking restrictions.
Key Applications of UNS S17400 Series Nuts
Our stainless steel 17-4 PH nuts are deployed globally in aerospace assemblies, oil and gas subsea equipment, chemical processing machinery, and high-performance marine engineering applications.
| Industry Sector | Primary Fastener Application |
|---|---|
| Aerospace & Defense | Jet engine mount brackets, flight control linkages, and landing gear assemblies |
| Oil & Gas Subsea | High-pressure valve stems, blowout preventer (BOP) flanges, and pump shafts |
| Chemical Processing | Mixers, agitator impeller mountings, and centrifuge drive couplings |
| Power Generation | Steam turbine blade securing hardware and nuclear reactor control rod drives |
| Marine Engineering | Propeller shaft couplings, high-load deck hardware, and hydrofoil bolts |
Stainless Steel 17-4 PH Nuts vs 316 Stainless Steel Nuts
When selecting the ideal stainless fastener grade for your assembly, understanding the structural and performance differentials between 17-4 PH and 316 stainless steel is crucial.
| Comparison Factor | Stainless Steel 17-4 PH Nuts | 316 Stainless Steel Nuts |
|---|---|---|
| Alloy Matrix | Martensitic / Precipitation Hardening | Austenitic |
| Yield Strength (0.2% Proof) | Extreme (725 to 1170 MPa depending on heat condition) | Moderate (~ 220 MPa) |
| Hardness Control | High hardness achievable via thermal aging (28 to 44 HRC) | Non-hardenable by heat treatment (~ 80 to 95 HRB) |
| Corrosion Performance | Comparable to Type 304; moderate pitting resistance | Superior chloride pitting resistance due to Molybdenum |
| Magnetic Property | Strongly magnetic in all heat-treated conditions | Non-magnetic in annealed condition |
| Detailed Specifications | Current Page | View SS 316 Nuts Specs → |
Quality Testing & Inspection
Aurum Overseas enforces rigid quality control measures to ensure all shipments from our facility as a Stainless Steel 17-4 PH Nuts Supplier and Stainless Steel 17-4 PH Nuts Exporter strictly match project specifications.
| Test / Inspection Standard | Technical Verification Scope |
|---|---|
| Positive Material Identification (PMI) | XRF testing verifying 15-17.5% Cr, 3-5% Ni, and 3-5% Cu content |
| Hardness Inspection | Rockwell C testing per ASTM E18 to confirm H900, H1025, or H1150 condition |
| Dimensional Inspection | Thread profile, pitch diameter, and concentricity verification per ASME B18.2.2 |
| Tensile & Shear Testing | Proof load and ultimate tensile strength testing on representative lot samples |
| Certifications | Full heat traceability with EN 10204 3.1 Material Test Reports |
Global Export Markets
As an international Stainless Steel 17-4 PH Nuts Exporter, Aurum Overseas supplies export-compliant, protective-wrapped fasteners to energy, aerospace, and industrial hubs worldwide.
USA
Canada
Mexico
Germany
United Kingdom
France
Italy
Netherlands
Belgium
Spain
Poland
UAE
Saudi Arabia
Qatar
Kuwait
Oman
Bahrain
Frequently Asked Questions
"PH" stands for Precipitation Hardening. It describes a heat-treating process where low-temperature aging precipitates copper-rich particles within the martensitic matrix to increase tensile strength and hardness.
Condition A is the solution-annealed condition supplied for machining. H900 represents aging at 900°F (480°C) for maximum yield strength and hardness. H1150 represents aging at 1150°F (620°C) for improved ductility, toughness, and stress corrosion resistance.
Yes, UNS S17400 nuts have a martensitic crystal structure, making them strongly magnetic in both the solution-annealed and aged conditions.
Aurum Overseas produces 17-4 Ph SS Hex Head Nuts, 17-4 Ph SS Square Nuts, 17-4 Ph SS T Nuts, and heavy forged 17-4 Ph SS Eye Nuts customized to engineering blueprints.
Yes, when heat-treated to double H1150 (H1150-D) or H1150-M conditions, 17-4 PH nuts meet NACE MR0175/ISO 15156 hardness limits for sour gas exposure in petroleum production.
Yes, every order shipped by Aurum Overseas includes comprehensive EN 10204 3.1 Mill Test Certificates detailing chemical analysis, aging heat treatment records, and mechanical proof load testing.
Contact Aurum Overseas
Aurum Overseas provides rapid pricing, complete mill test certificates, and global logistics for precipitation-hardening fastener requirements.
Contact our sales engineering desk today for quotes and technical assistance.