Table of Contents
- SS 316/316L/316Ti Washers Overview
- SS 316/316L/316Ti Washers Specifications
- SS 316 Series Technical Properties & Composition
- Comparison: SS 316 vs. SS 316L vs. SS 316Ti
- Why Industries Prefer SS 316/316L/316Ti Washers
- Types of SS 316 Washers
- Key Technical Advantages
- Key Applications of SS 316/316L/316Ti Washers
- Quality Testing & Inspection
- Global Export Markets
- Frequently Asked Questions
- Contact Aurum Overseas
SS 316/316L/316Ti Washers Suppliers & Exporters
Aurum Overseas is a premier SS 316/316L/316Ti Washers Supplier and SS 316/316L/316Ti Washers Exporter, providing high-performance molybdenum-bearing austenitic stainless steel washers engineered for superior load distribution and leak-free joint integrity.
Manufactured in full compliance with ASME B18.21.1, ISO 7089, and DIN 125 standards, these specialized UNS S31600 / S31603 / S31635 Washers deliver exceptional resistance to chloride pitting, crevice corrosion, and chemical attack across marine, pharmaceutical, and chemical processing lines.
As a worldwide SS 316/316L/316Ti Washers Exporter, Aurum Overseas distributes fully certified (A4-70 / A4-80) bolting hardware across North America (USA, Canada, Mexico), Europe (Germany, UK, France, Italy, Netherlands, Norway), the Middle East (UAE, Saudi Arabia, Qatar, Kuwait, Oman), and Asia-Pacific (Singapore, Malaysia, Australia).
SS 316/316L/316Ti Washers Specifications
| Parameter | Technical Specification / Standard Range |
|---|---|
| Material Grades | Stainless Steel 316, 316L, 316Ti (Property Class A4-70 / A4-80) |
| UNS Designations | UNS S31600 / S31603 / S31635 Washers |
| Werkstoff Numbers | 1.4401 / 1.4404 / 1.4571 |
| Manufacturing Standards | ASTM A240 / ASME SA240, ASTM A193/A194 Hardware Specs, ISO 3506-1 |
| Dimensional Specifications | ASME B18.21.1, DIN 125 A/B, DIN 127 B, DIN 9021, ISO 7089, ISO 7090 |
| Washer Types | Plain Flat, Heavy Duty Structural, Spring Lock, Belleville Washers, Tab Washers |
| Size Range | Imperial: #4 to 4" NB | Metric: M3 to M100 |
| Thickness Range | 0.5 mm to 12 mm (Custom gauges available on order) |
| Hardness Range | Annealed: HRB 95 max (217 HBW max) |
| Surface Finishes | Bright Annealed, Passivated, Pickled, Electro-polished, PTFE/Xylan Coated |
| Certification | EN 10204 3.1 MTR, PMI Testing Report, Hardness Verification |
SS 316 Series Technical Properties & Composition
Chemical Composition of UNS S31600 Washers (%)
| Element | SS 316 (S31600) | SS 316L (S31603) | SS 316Ti (S31635) |
|---|---|---|---|
| Carbon (C) | 0.08 max | 0.030 max | 0.08 max |
| Manganese (Mn) | 2.00 max | 2.00 max | 2.00 max |
| Silicon (Si) | 0.75 max | 0.75 max | 0.75 max |
| Phosphorus (P) | 0.045 max | 0.045 max | 0.045 max |
| Sulfur (S) | 0.030 max | 0.030 max | 0.030 max |
| Chromium (Cr) | 16.0 – 18.0 | 16.0 – 18.0 | 16.0 – 18.0 |
| Molybdenum (Mo) | 2.00 – 3.00 | 2.00 – 3.00 | 2.00 – 3.00 |
| Nickel (Ni) | 10.0 – 14.0 | 10.0 – 14.0 | 10.0 – 14.0 |
| Titanium (Ti) | — | — | 5 x (C + N) min to 0.70 max |
Mechanical Properties of UNS S31600 Washers
| Property / Parameter | SS 316 | SS 316L | SS 316Ti |
|---|---|---|---|
| Tensile Strength (MPa) min | 515 | 485 | 515 |
| Yield Strength 0.2% Proof (MPa) min | 205 | 170 | 205 |
| Elongation (% in 50mm) min | 40 | 40 | 40 |
| Rockwell Hardness B (HR B) max | 95 | 95 | 95 |
| Brinell Hardness (HB) max | 217 | 217 | 217 |
| Microstructural Requirements | Standard Mo-austenitic | Extra-low carbon, intergranular resistant | Titanium-stabilized against carbide decay |
Equivalent Grades of SS 316 / 316L / 316Ti Washers
| Standard / System | SS 316 | SS 316L | SS 316Ti |
|---|---|---|---|
| UNS Designation | S31600 | S31603 | S31635 |
| Werkstoff Nr. | 1.4401 | 1.4404 | 1.4571 |
| Euronorm Name | X5CrNiMo17-12-2 | X2CrNiMo17-12-2 | X6CrNiMoTi17-12-2 |
| JIS Standard | SUS 316 | SUS 316L | SUS 316Ti |
Comparison: SS 316 vs. SS 316L vs. SS 316Ti
| Feature | SS 316 | SS 316L | SS 316Ti |
|---|---|---|---|
| Carbon & Alloy Modifiers | Standard (0.08% max C) | Low Carbon (0.030% max C) | Titanium Stabilized (5x C min) |
| Max Operating Temp. | Up to 800°C intermittent | Up to 425°C for welded parts | Continuous service up to 800°C |
| Weld Heat Zone | Susceptible to sensitization | Prevents carbide precipitation | Titanium ties up carbon, preventing decay |
| Chloride Pitting Resistance | High (2.0-3.0% Mo) | High (2.0-3.0% Mo) | Superior elevated-temp pitting defense |
| Best Used For | General marine & process bolting | Heavy welded chemical vessels | High-temp chemical & exhaust lines |
Why Industries Prefer SS 316/316L/316Ti Washers
Prevents Chloride Pitting: 2.0-3.0% molybdenum content resists localized pitting in salt spray and brackish water environments.
Maintains Flange Torque Preload: Spreads bolt clamp force evenly to prevent gasket cold flow and flange leakage under vibration.
Eliminates Weld-Zone Decay: Low-carbon 316L variants prevent chromium carbide precipitation during direct welding.
Resists Elevated-Temperature Sensitization: Titanium-stabilized 316Ti variants maintain structural integrity during prolonged heating up to 800°C.
Resists Acid Attack: Performs reliably in acetic, tartaric, and dilute sulfuric acid processing streams.
Types of SS 316 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.
SS 316 Plain Washers
SS 316 Spring Washers
SS 316 Lock Washers
SS 316 Square Washers
SS 316 Conical Washers
Key Technical Advantages
High Corrosion Resistance
Molybdenum addition provides superior corrosion defense compared to standard 18-8 series stainless steels.
Non-Magnetic Properties
Fully austenitic matrix maintains low magnetic permeability in sensitive medical and electronic instruments.
Cryogenic Toughness
Retains high impact resistance and ductility at sub-zero and sub-cryogenic temperatures.
Smooth Passivated Finish
Chemical passivation removes surface tramp iron to prevent localized rusting and staining.
Anti-Galling Performance
Precision cold stamping ensures flat bearing surfaces that minimize thread galling under high torque.
Key Applications of SS 316/316L/316Ti Washers
| Industry Sector | Recommended Grade | Typical Equipment Application | Service Conditions |
|---|---|---|---|
| Marine & Offshore | SS 316 / A4-70 | Shipboard fittings, deck hardware | Saltwater spray, splash zone exposure |
| Pharmaceutical Mfg. | SS 316L | Sanitary piping, reaction vessels | CIP/SIP washdowns, low-carbon purity |
| Chemical Processing | SS 316Ti | Acid piping, heat exchanger flanges | Elevated temps up to 800°C, aggressive acids |
| Desalination Plants | SS 316L | High-pressure reverse osmosis skids | Concentrated brine, high pressure |
| Pulp & Paper | SS 316 | Bleaching equipment, digester lines | Sulfite liquors, organic acid solutions |
Quality Testing & Inspection
As a dedicated SS 316/316L/316Ti Washers Supplier and SS 316/316L/316Ti Washers Exporter, Aurum Overseas subjects every manufacturing lot to comprehensive quality verification before shipment.
- Chemical Verification: Positive Material Identification (PMI) via XRF spectroscopy to verify exact chromium, nickel, and molybdenum content.
- Mechanical & Hardness Testing: Proof load, yield strength, and Rockwell B hardness verification (<= 95 HRB) per ASTM A240 standards.
- Dimensional Precision: Optical comparator and digital micrometer inspection for thickness, inner clearance, and outer diameter tolerances per ASME B18.21.1 and DIN 125.
- Material Traceability: Complete EN 10204 3.1 Material Test Reports provided with every order, detailing full heat source and batch test results.
Global Export Markets
Aurum Overseas distributes UNS S31600 / S31603 / S31635 Washers to key industrial hubs and major engineering projects worldwide:
USA
Canada
Mexico
Germany
United
Kingdom
France
Italy
Netherlands
Norway
UAE
Saudi
Arabia
Qatar
Kuwait
Oman
Singapore
Malaysia
Australia
Frequently Asked Questions
A4 indicates a molybdenum-bearing austenitic stainless steel grade (equivalent to AISI 316), while 70 and 80 represent the minimum tensile strength classes (700 MPa and 800 MPa respectively) per ISO 3506 standards.
SS 316Ti contains titanium additions that bind with carbon to form titanium carbides. This prevents chromium depletion and intergranular corrosion during continuous service at elevated temperatures between 425°C and 800°C.
SS 316L features an extra-low carbon limit (0.030% max) which prevents carbide precipitation during welding, providing an ultra-smooth, corrosion-resistant surface that meets strict hygienic standards.
In the fully annealed state, these washers are virtually non-magnetic. Slight magnetic permeability may develop after cold stamping or forming, which can be eliminated via solution annealing.
We supply imperial and metric washers manufactured to ASME B18.21.1, DIN 125, DIN 127, DIN 9021, ISO 7089, and ISO 7090 specifications, alongside custom drawings.
Yes, as a global SS 316/316L/316Ti Washers Exporter, Aurum Overseas supplies fully certified washers with EN 10204 3.1 Material Test Reports to contractors and OEMs worldwide.
Contact Aurum Overseas
Aurum Overseas manufactures and stocks certified SS 316/316L/316Ti Washers for immediate global dispatch.
Contact our technical sales team for instant pricing, material test reports, and custom size requirements.