Table of Contents
- 17-4 PH Stainless Steel Washers Overview
- 17-4 PH Stainless Steel Washers Specifications
- 17-4 PH Technical Properties & Composition
- 17-4 PH vs. 316 Stainless Steel
- Why Industries Prefer 17-4 PH Stainless Steel Washers
- Types of 17-4 PH Stainless Steel Washers
- Key Technical Advantages
- Key Applications of 17-4 PH Stainless Steel Washers
- Quality Testing & Inspection
- Global Export Markets
- Frequently Asked Questions
- Contact Aurum Overseas
17-4 PH Stainless Steel Washers Suppliers & Exporters
Aurum Overseas is a premier 17-4 Ph Stainless Steel Washers Supplier and 17-4 Ph Stainless Steel Washers Exporter, providing high-strength precipitation-hardening fasteners in Plain, Spring, Lock, Square, and Conical styles built to ASME B18.21.1, DIN 125, and ISO 7089 standards.
Composed of 15.00–17.50% chromium, 3.00–5.00% nickel, and 3.00–5.00% copper, these UNS S17400 Washers undergo age-hardening heat treatments to deliver maximum hardness and fatigue resistance under extreme torque loads. As an established 17-4 Ph Stainless Steel Washers Exporter, we offer fully certified, precision-machined hardware with worldwide delivery across major global markets.
17-4 PH Stainless Steel Washers Specifications
| Parameter | Technical Specification / Standard Range |
|---|---|
| Material Grade | 17-4 PH Stainless Steel (AISI 630 / UNS S17400) |
| UNS Designation | UNS S17400 Washers |
| Werkstoff Number | 1.4542 (X5CrNiCuNb16-4) |
| Manufacturing Standards | ASTM A564 / ASME SA564, ASTM A693 |
| Dimensional Specifications | ASME B18.21.1, DIN 125 A/B, DIN 127 B, DIN 9021, ISO 7089, ISO 7090 |
| Washer Types | Plain Washer, Spring Washer, Lock Washer, Square Washer, Conical Washer |
| Size Range | Imperial: #4 to 4" NB | Metric: M3 to M100 |
| Thickness Range | 0.5 mm to 12 mm (Custom gauges available on order) |
| Heat Treatment States | Solution Annealed (Condition A), H900, H1025, H1075, H1150 |
| Hardness Range | 40–47 HRC (Condition H900 typical) |
| Surface Finishes | Passivated, Bright Machined, Pickled, Shot Blasted |
| Certification | EN 10204 3.1 MTR, Hardness Testing, PMI Verification |
17-4 PH Technical Properties & Composition
Chemical Composition of UNS S17400 Washers (%)
| Element | 17-4 PH (UNS S17400) |
|---|---|
| Carbon (C) | ≤ 0.07 |
| Manganese (Mn) | ≤ 1.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 15.00 – 17.50 |
| Nickel (Ni) | 3.00 – 5.00 |
| Copper (Cu) | 3.00 – 5.00 |
| Niobium (Nb) + Tantalum (Ta) | 0.15 – 0.45 |
| Iron (Fe) | Balance |
Mechanical Properties of UNS S17400 Washers
| Property / Parameter | 17-4 PH (Condition H900) |
|---|---|
| Tensile Strength (MPa) min | ≥ 1310 |
| Yield Strength 0.2% Proof (MPa) min | ≥ 1170 |
| Elongation (% in 2") min | ≥ 10 |
| Rockwell Hardness (HRC) | 40–47 HRC |
Equivalent Grades of 17-4 PH Stainless Steel Washers
| Standard / System | Equivalent Designation |
|---|---|
| UNS Designation | S17400 |
| AISI / SAE Grade | Grade 630 / 17-4 PH |
| Werkstoff Nr. | 1.4542 |
| Euronorm Name | X5CrNiCuNb16-4 |
17-4 PH vs. 316 Stainless Steel
| Feature | 17-4 PH (UNS S17400) | SS 316 (UNS S31600) |
|---|---|---|
| Alloy Category | Precipitation-Hardening Martensitic | Standard Austenitic Stainless |
| Tensile Strength | High Tensile (≥ 1310 MPa in H900) | Moderate Tensile (~515 MPa) |
| Hardness Level | Up to 47 HRC via age hardening | ~80–90 HRB (Non-hardenable by heat) |
| Copper Addition | 3.00–5.00% Cu for precipitation hardening | No intentionally added copper |
| High Load Torque Capability | Exceptional yield limit (≥ 1170 MPa) | Lower yield limit (~205 MPa) |
| Primary Advantage | High mechanical strength with good corrosion resistance | General corrosion and pitting resistance |
Why Industries Prefer 17-4 PH Stainless Steel Washers
High Mechanical Load Capacity: Delivers yield strength limits exceeding 1170 MPa, preventing washer flattening under intense bolt preloads.
Precipitation Hardening Versatility: Tailored mechanical properties via aging heat treatments from H900 to H1150 to balance hardness and fracture toughness.
Galling & Wear Resistance: High surface hardness up to 47 HRC prevents surface biting, galling, and thread wear during repeated assembly.
Atmospheric Corrosion Resistance: Offers corrosion protection comparable to 304 stainless steel in mild chemical and atmospheric conditions.
Dimensional Stability: Minimal distortion during low-temperature thermal aging ensures flat washer profiles remain within tight tolerances.
Types of 17-4 PH Stainless Steel Washers
Aurum Overseas supplies a comprehensive range of stainless steel washer configurations manufactured according to standard DIN, ASME, and ISO dimensional tolerances for multiple engineering assemblies.
17-4 PH Plain Washers
17-4 PH Spring Washers
17-4 PH Lock Washers
17-4 PH Square Washers
17-4 PH Conical Washers
Key Technical Advantages
Copper Precipitation Matrix
Contains 3.00–5.00% copper that forms microscopic sub-grain precipitates during heat treatment to boost strength.
High Proof Load Performance
Holds a minimum 0.2% yield strength of 1170 MPa to prevent plastic deformation during high-torque bolting.
Superior Resistance to Fatigue
High yield-to-tensile ratio prevents joint relaxation under cyclic mechanical vibration and pressure fluctuations.
Custom Heat-Treated States
Available in Condition A, H900, H1025, or H1150 depending on whether maximum hardness or stress-corrosion ductility is needed.
Low Elastic Relaxation
Maintains firm compression over prolonged service intervals without settling or losing bolt tension.
Key Applications of 17-4 PH Stainless Steel Washers
| Industry Sector | Application | Operating Environment |
|---|---|---|
| Aerospace & Defense | Actuator mountings, landing gear assemblies, and turbine housing bolts | High structural stresses, intense vibration, and cyclic thermal shock |
| Oil & Gas Extraction | High-pressure valve bodies, wellhead trees, and downhole tooling joints | Extreme mechanical torque, high pressures, and mild sour gas exposure |
| Power Generation | Steam turbine casing bolts, pump impellers, and nuclear valve actuators | High mechanical fatigue, elevated operating pressures, and steam flow |
| Chemical Processing | High-torque mixer flanges, pressure vessel covers, and drive shafts | Dynamic stress levels combined with mild corrosive process fluids |
| Marine Engineering | Propeller shaft mountings, rudder control linkages, and winch hardware | High mechanical shear loads in atmospheric marine exposure |
Quality Testing & Inspection
As a leading 17-4 Ph Stainless Steel Washers Supplier, Aurum Overseas enforces strict quality protocols across production batches:
- Chemical Analysis: XRF Positive Material Identification (PMI) confirming 15.00–17.50% Cr, 3.00–5.00% Ni, and 3.00–5.00% Cu.
- Hardness Verification: Rockwell C scale testing to confirm 40–47 HRC hardness target for Condition H900.
- Tensile & Yield Testing: Mechanical load testing confirming tensile strength ≥ 1310 MPa and yield strength ≥ 1170 MPa.
- Dimensional Tolerances: Optical comparator and laser micrometer checks verifying washer flatness, thickness, ID, and OD to ASME B18.21.1 and DIN 125 standards.
- Traceable MTR Certification: Full EN 10204 3.1 certification providing heat traceability from raw mill material to final inspection.
Global Export Markets
Aurum Overseas, a global 17-4 Ph Stainless Steel Washers Exporter, delivers certified UNS S17400 Washers to industrial clients globally:
USA
Canada
Mexico
Germany
United
Kingdom
France
Italy
Netherlands
Norway
UAE
Saudi
Arabia
Qatar
Kuwait
Oman
Singapore
Malaysia
Australia
Frequently Asked Questions
Heat treating to Condition H900 provides maximum mechanical strength, achieving tensile strength ≥ 1310 MPa and hardness levels up to 47 HRC.
Yes, UNS S17400 Washers have a martensitic structure and are magnetic in all heat-treated conditions.
While 304 and 316 offer good general corrosion resistance, 17-4 PH provides significantly higher tensile strength (≥ 1310 MPa) and yield strength (≥ 1170 MPa) for heavy load applications.
As a trusted 17-4 Ph Stainless Steel Washers Supplier, we manufacture Plain Washers, Spring Washers, Lock Washers, Square Washers, and Conical Washers.
17-4 PH performs well in atmospheric marine environments, but for continuous submerged seawater service, super austenitic grades like 904L or nickel alloys may be preferred to prevent crevice corrosion.
Yes, as a dedicated 17-4 Ph Stainless Steel Washers Exporter, all shipments include certified EN 10204 3.1 Material Test Reports covering heat number, chemistry, and mechanical properties.
Contact Aurum Overseas
Aurum Overseas stocks and manufactures high-performance 17-4 PH Stainless Steel Washers for immediate global shipment.
Contact our technical sales team for instant quotes, MTR documentation, and custom sizing.