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Stainless Steel 316/316L Fasteners are designed to provide exceptional performance in high-temperature and corrosive environments. These fasteners are widely used in industrial, chemical, and power generation applications due to their superior durability and resistance to oxidation.
Manufactured from premium-grade SS 316/316L material, these fasteners offer excellent thermal stability. They can withstand extreme temperatures up to 1150°C, making them ideal for furnace, heat exchanger, and boiler applications.
Our Stainless Steel 316/316L Fasteners include a wide range of products such as bolts, nuts, screws, studs, and washers. Each item is precision-engineered to ensure a secure fit and long-lasting performance in demanding industrial settings.
Corrosion resistance is a key feature of SS 316/316L Fasteners. The high chromium and nickel content in the alloy protects the fasteners from rust and chemical attack, even in harsh environments involving acids, alkalis, or salts.
These fasteners exhibit excellent mechanical properties including high tensile strength, hardness, and resistance to thermal expansion. This ensures that assemblies remain stable and safe under mechanical stress and extreme temperatures.
Stainless Steel 316/316L Fasteners are available in various sizes and thread types, catering to both standard and customized industrial requirements. They are suitable for applications ranging from petrochemical plants to aerospace equipment.
The manufacturing process of SS 316/316L Fasteners adheres to international quality standards, including ASTM, ASME, and ISO certifications. This guarantees consistent quality, reliability, and safety for all industrial applications.
Ease of installation and maintenance makes Stainless Steel 316/316L Fasteners a preferred choice for engineers and technicians. Their robust construction reduces the need for frequent replacement, minimizing downtime and operational costs.
Specification Table
| Specification | Details |
|---|---|
| Material | Stainless Steel 316 / 316L (AISI, UNS S31600 / S31603) |
| Standards | ASTM A193 / A194, ASTM F593 / F594, ASME SA193 / SA194 |
| Grades | 316, 316L |
| Types | Bolts, Nuts, Screws, Washers, Stud Bolts, Threaded Rods |
| Sizes | M3 to M72 | 1/8” to 3” (custom sizes available) |
| Threads | Metric, UNC, UNF, BSW, BSF |
| Coating / Finish | Plain, Passivated, PTFE Coated, Hot Dip Galvanized |
| Head Types | Hex Head, Socket Head, Round Head, Flat Head, Square Head |
| Standards Available | DIN, ISO, ASTM, BS, JIS |
| Applications | Marine, Chemical Processing, Petrochemical, Food Industry, Construction |
| Temperature Range | Up to 870°C (continuous service) |
Chemical Composition (Typical ranges for SS316/316L)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Element | 316 (%) | 316L (%) |
|---|---|---|
| Carbon (C) | ≤ 0.08 | ≤ 0.03 |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 |
| Silicon (Si) | ≤ 0.75 | ≤ 0.75 |
| Phosphorus (P) | ≤ 0.045 | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.030 |
| Chromium (Cr) | 16.00 – 18.00 | 16.00 – 18.00 |
| Nickel (Ni) | 10.00 – 14.00 | 10.00 – 14.00 |
| Molybdenum (Mo) | 2.00 – 3.00 | 2.00 – 3.00 |
| Iron (Fe) | Balance | Balance |
Mechanical Properties (Typical)
| Property | 316 | 316L | Test Method / Standard |
|---|---|---|---|
| Tensile Strength (MPa) | 515 – 690 | 485 – 620 | ASTM A193 / ASTM A320 |
| Yield Strength 0.2% Proof (MPa) | 205 | 170 | ASTM A193 / ASTM A320 |
| Elongation (% in 50 mm) | 40 min | 40 min | ASTM A193 / ASTM A320 |
| Brinell Hardness (HB) | ≤ 217 | ≤ 217 | ASTM E10 |
| Modulus of Elasticity (GPa) | 193 | 193 | ASTM E111 |
| Density (g/cm³) | 8.00 | 8.00 | ASTM B311 |
| Melting Point (°C) | 1370 – 1400 | 1370 – 1400 | — |
| Impact Strength (Charpy V-Notch J) | ≥ 100 | ≥ 100 | ASTM E23 |
Equivalent Grades
| Standard | Grade 316 | Grade 316L |
|---|---|---|
| UNS | S31600 | S31603 |
| WNR | 1.4401 | 1.4404 / 1.4435 |
| ASTM / ASME | ASTM A193 / A194 Gr 316 | ASTM A193 / A194 Gr 316L |
| EN | X5CrNiMo17-12-2 | X2CrNiMo17-12-2 |
| JIS | SUS316 | SUS316L |
| BS | 316S31 | 316S11 |
| GOST | 03Ch17N14M3 | 03Ch17N14M3 |
| AFNOR | Z6CND17-11-02 | Z2CND17-12 |
| ISO | 316 | 316L |
Dimension & Weight Chart (Selected common sizes)
Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.
| Nominal Diameter (mm) | Thread Pitch (mm) | Length (mm) | Across Flats (mm) | Head Height (mm) | Approx. Weight (kg / 100 pcs) |
|---|---|---|---|---|---|
| M6 | 1.0 | 12 – 100 | 10 | 4 | 1.2 |
| M8 | 1.25 | 16 – 120 | 13 | 5.3 | 2.5 |
| M10 | 1.5 | 20 – 130 | 17 | 6.4 | 4.5 |
| M12 | 1.75 | 25 – 150 | 19 | 7.5 | 6.8 |
| M16 | 2.0 | 30 – 200 | 24 | 10 | 13.5 |
| M20 | 2.5 | 35 – 220 | 30 | 12.5 | 22.0 |
| M24 | 3.0 | 40 – 250 | 36 | 15 | 33.0 |
| M30 | 3.5 | 50 – 300 | 46 | 18.7 | 60.0 |
| M36 | 4.0 | 60 – 320 | 55 | 22.5 | 95.0 |
Common Types Of Fasteners
Bolts
Nuts
Steel Screw
Washer
Stud Bolts
Frequently Asked Questions (FAQ)
Which applications are 316 / 316L fasteners best used for?
316/316L fasteners are used in marine environments, chemical processing equipment, food and beverage, pharmaceuticals, medical devices, architectural projects near coastlines, and wherever high resistance to chloride pitting is required.
Is 316 better than 304 for fasteners?
Yes for chloride-rich or more aggressive corrosive environments. 316 contains molybdenum which gives superior resistance to pitting and crevice corrosion compared with 304. For mild indoor applications, 304 is usually sufficient and cheaper.
Can I use 316/316L fasteners in seawater?
316/316L performs well in many marine exposures (splash zones, humid coastal air). However, in continuous immersion in seawater or highly aggressive chloride environments, higher-alloy grades (e.g. duplex, 6% Mo super austenitics or nickel alloys) may be required. Consider design, oxygenation, crevices and galvanic couples.
Are 316/316L fasteners magnetic?
Annealed austenitic 316/316L is essentially non-magnetic. Cold working (e.g., heavy forming or threading) can introduce some martensite and produce slight magnetic response, especially in bolts and screws that have been cold-finished.
What sizes are available for SS 316/316L Fasteners?
Sizes range from M6 to M36 (metric) or 1/4" to 1 1/2" (imperial), with custom sizes available upon request.
Pipes & Tubes Supplier
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