Table of Contents
- SS 316/316L/316Ti Nuts Overview
- SS 316/316L/316Ti Nuts Specifications
- What are Stainless Steel 316/316L/316Ti Nuts?
- SS 316 / 316L / 316Ti Technical Properties & Composition
- Why Industries Prefer SS 316 Series Nuts
- Types of SS 316 Series Nuts
- Key Advantages of UNS S31600 / S31603 Series Nuts
- Key Applications of SS UNS S31600 Series Nuts
- SS 316 Nuts vs SS 304 Nuts
- Quality Testing & Inspection
- Global Export Markets
- Frequently Asked Questions
- Contact Aurum Overseas
SS 316 / 316L / 316Ti Nuts Suppliers & Exporters
Aurum Overseas is a global SS 316/316L/316Ti Nuts Supplier and stocking SS 316/316L/316Ti Nuts Exporter. Standardized with 2–3% molybdenum additions, our marine-grade austenitic stainless steel nuts are engineered specifically to resist severe chloride-induced pitting, crevice oxidation, and chemical degradation.
Manufactured to international criteria including ASTM A194 Grade 8M Nuts and strain-hardened ASTM A194 Gr 8M Class 2 Nuts standards, these fasteners deliver exceptional tensile stability for marine infrastructure, offshore oil platforms, and pharmaceutical processing units. We distribute full metric and imperial dimensions to critical processing sectors throughout the USA, Europe, the Middle East, and Asia-Pacific regions.
SS 316/316L/316Ti Nuts Specifications
| Parameter | Specification / Technical Range |
|---|---|
| Material Grades | SS 316, SS 316L, SS 316Ti |
| UNS Numbers | UNS S31600 / UNS S31603 / UNS S31635 |
| Manufacturing Standards | ASTM A194 Grade 8M Nuts, ASTM A194 Gr 8M Class 2 Nuts, ASTM F593, ASME B18.2.2, DIN 934, ISO 4032 |
| Size Range | M3 to M56 (Metric) | 3/8" to 2" (Imperial) | Custom industrial sizes |
| Thread Configuration | ASME B1.1 2A/3A - 2B/3B Unified (UNC, UNF, UNEF) & B1.13M 6h-6G Metric |
| Special Fastener Formats | SS 316 Hex Head Nuts, SS 316 Square Nuts, SS 316 T Nuts, SS 316 Eye Nuts |
| Surface Finishes | Bright Polished, Electropolished, Passivated, Anti-Galling Coated |
What are Stainless Steel 316/316L/316Ti Nuts?
Marine-grade 316-series nuts are molybdenum-bearing austenitic fasteners designed to resist localized corrosion in aggressive chemical environments.
- SS 316 (UNS S31600 / 1.4401): The baseline molybdenum-bearing grade, balancing general mechanical strength with high resistance to pitting in acidic and chloride-heavy media.
- SS 316L (UNS S31603 / 1.4404): Low-carbon variant (0.035% max C) engineered specifically to prevent intergranular sensitization during heavy welding operations.
- SS 316Ti (UNS S31635 / 1.4571): Titanium-stabilized derivative where titanium addition (at least 5x Carbon content) binds carbon at elevated temperatures, preventing chromium carbide precipitation during long-term exposure between 425°C and 860°C.
SS 316 / 316L / 316Ti Technical Properties & Composition
The chemical composition and mechanical properties of the 316 series are calibrated to deliver the optimal balance between chloride pitting resistance, weld zone stability, elevated-temperature performance, and thread integrity.
Chemical Composition of UNS S31600 / S31603 / S31635 Nuts (%)
| Element | SS 316 | SS 316L | SS 316Ti |
|---|---|---|---|
| Carbon (C) | 0.08 max | 0.035 max | 0.020 max |
| Manganese (Mn) | 2.0 max | 2.0 max | 2 max |
| Silicon (Si) | 1.0 max | 1.0 max | 1.0 max |
| Phosphorus (P) | 0.045 max | 0.045 max | 0.040 max |
| Sulfur (S) | 0.030 max | 0.030 max | 0.030 max |
| Chromium (Cr) | 16.00 – 18.00 | 16.00 – 18.00 | 19 – 23 |
| Molybdenum (Mo) | 2.00 – 3.00 | 2.00 – 3.00 | 4.00 – 5.00 |
| Nickel (Ni) | 11.00 – 14.00 | 10.00 – 14.00 | 23.00 – 28.00 |
| Nitrogen (N) | 67.845 min | 68.89 min | — |
Mechanical Properties of UNS S31600 / S31603 / S31635 Nuts
| Technical Parameter | Metric / Imperial Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1400 °C (2550 °F) |
| Tensile Strength | 515 MPa / 75,000 Psi min |
| Yield Strength (0.2% Offset) | 205 MPa / 30,000 Psi min |
| Elongation in 50mm | 35 % |
Equivalent Grades of SS 316 / 316L / 316Ti Nuts
| Grade | UNS | W.Nr. | JIS | EN |
|---|---|---|---|---|
| SS 316 | S31600 | 1.4401 / 1.4436 | SUS 316 | X5CrNiMo17-12-2 / X3CrNiMo17-13-3 |
| SS 316L | S31603 | 1.4404 / 1.4435 | SUS 316L | X2CrNiMo17-12-2 / X2CrNiMo18-14-3 |
| SS 316Ti | S31635 | 1.4571 | SUS 316Ti | X6CrNiMoTi17-12-2 |
Why Industries Prefer SS 316 Series Nuts
Industrial operations subjected to halide solutions, brackish water, or organic acids prefer 316-series fasteners over basic 18/8 steels. The presence of molybdenum significantly raises the Pitting Resistance Equivalent Number (PREN), ensuring that threads do not develop localized pitting that causes joint seizure or pressure boundary leaks.
As an established SS 316/316L/316Ti Nuts Exporter, Aurum Overseas supplies precision-machined fasteners that maintain structural integrity in sour gas services complying with NACE MR0175 requirements and high-purity biopharmaceutical pipelines.
Types of SS 316 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 316 Hex Head Nuts
SS 316 Square Nuts
SS 316 Lock Nuts
SS 316 Eye Nuts
SS 316 Wing Nuts
SS 316 T Nuts
SS 316 Panel Nuts
SS 316 Coupling Nuts
SS 316 Dome Nuts
Key Advantages of UNS S31600 / S31603 Series Nuts
Chloride Pitting Protection
Molybdenum alloy addition resists pitting and crevice corrosion in marine and chemical environment exposures.
Weld Joint Preservation (316L)
Low-carbon chemistry eliminates carbide precipitation along weld heat-affected zones, preserving full corrosion resistance.
Elevated Heat Stabilization (316Ti)
Titanium additions prevent sensitization under continuous thermal operating conditions up to 800°C.
Higher Yield Options
Class 2 strain-hardened variants provide enhanced yield strength for high-pressure flanged connections.
Non-Contaminating Finish
Smooth passivated and electropolished surfaces prevent product adhesion in sanitary biopharma processes.
Key Applications of SS UNS S31600 Series Nuts
Our stainless steel 316 nuts are deployed globally in marine infrastructure, chemical processing facilities, and high-purity pharmaceutical manufacturing environments.
| Industry Sector | Primary Fastener Application |
|---|---|
| Offshore Marine & Subsea | Desalination plants, platform risers, underwater housings, and deck winches |
| Chemical & Petrochemical Processing | Acetic acid vessels, heat exchanger tube-sheets, and chloride transfer lines |
| Biopharmaceuticals & Food | High-purity process skids, fermentation tanks, and sanitary piping manifolds |
| Pulp & Paper Manufacturing | Bleaching equipment tanks, digester vessels, and washer drum assemblies |
| Pollution Control Systems | Flue gas desulfurization (FGD) scrubbers and industrial stack dampers |
SS 316 Nuts vs SS 304 Nuts
When selecting the ideal stainless fastener grade for your assembly, understanding the material and performance differentials between SS 316 and SS 304 is crucial.
| Comparison Factor | SS 316 / 316L / 316Ti Nuts | SS 304 / 304L / 304H Nuts |
|---|---|---|
| Molybdenum Content | 2.0% – 3.0% Mo present | 0% Mo (No intentional addition) |
| Pitting Resistance (PREN) | Higher (~23–25 PREN) | Standard (~18–19 PREN) |
| Chloride Tolerance | High (Suitable for marine/coastal) | Low to moderate (Prone to pitting) |
| Cost Profile | Premium due to Molybdenum content | Standard economical industrial grade |
| Primary Industry | Marine, Offshore, Pharma, Chemical | Architectural, Food Processing, General OEM |
| Detailed Specifications | Current Page | View SS 304 Nuts Specs → |
Quality Testing & Inspection
Aurum Overseas implements rigorous quality assurance practices to guarantee every shipment supplied by our team as an SS 316/316L/316Ti Nuts Supplier meets project technical requirements.
| Test / Inspection Standard | Technical Verification Scope |
|---|---|
| Positive Material Identification (PMI) | Spectroscopic alloy verification confirming Mo, Ni, Cr, and Ti levels |
| Dimensional & Thread Gaging | Thread pitch, concentricity, and lead verification per ASME B18.2.2 and DIN standards |
| Proof Load & Tensile Testing | Mechanical verification of strain-hardened and standard strength properties |
| Intergranular Corrosion (IGC) | Testing per ASTM A262 Practice E to verify resistance to intercrystalline attack |
| Certified Mill Traceability | EN 10204 3.1 Certification accompanying all heat-treated manufacturing lots |
Global Export Markets
Aurum Overseas provides export-compliant crating, protective thread caps, and full documentation packages for high-grade stainless bolting globally.
USA
Canada
Mexico
Germany
United
Kingdom
France
Italy
Netherlands
Belgium
Spain
Poland
UAE
Saudi
Arabia
Qatar
Kuwait
Oman
Bahrain
Frequently Asked Questions
SS 316L uses reduced carbon to prevent intergranular sensitization during welding, but SS 316Ti uses titanium additions to stabilize carbon for continuous service at elevated temperatures (425°C to 860°C) without losing corrosion resistance.
Class 1 nuts are solution-annealed, offering standard strength. Class 2 nuts undergo strain hardening after solution treating, delivering higher yield and tensile strength for high-pressure service.
While mechanically compatible, mixing grades in corrosive or marine environments can lead to localized galvanic activity or premature pitting of the 304 component. It is best practice to match 316 nuts with 316 studs.
Yes, we supply a wide range of configurations including SS 316 Hex Head Nuts, SS 316 Square Nuts, SS 316 T Nuts, and SS 316 Eye Nuts to precise dimensional tolerances.
Yes, Aurum Overseas regularly exports certified SS 316 fasteners to major energy hubs across the USA, European markets (Germany, UK, France, Netherlands), and Gulf GCC nations (UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain).
We offer expedited air freight and scheduled sea freight shipping options to North America and European ports, ensuring secure export-grade palletized packaging for safe transit.
Contact Aurum Overseas
Aurum Overseas provides certified marine and chemical grade bolting for international projects. Contact our sales engineers today for technical documentation, stock availability, or price quotes.
Contact our sales team today to get a quote, get technical datasheets, or discuss your delivery schedule.