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Stainless Steel 317L 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 317L 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 317L 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 317L 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 317L 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 317L 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 317L Fasteners a preferred choice for engineers and technicians. Their robust construction reduces the need for frequent replacement, minimizing downtime and operational costs.
Specification Table
| Property | Specification / Value | Standard / Notes |
|---|---|---|
| Material Grade | SS 317L | AISI / ASTM |
| Type | Bolts, Screws, Nuts, Studs, Washers | Industrial Fasteners |
| Standard | ASTM A193 / A194 / ISO 3506 | Depends on fastener type |
| Thread Type | UNC, UNF, Metric (M) | Custom threads available |
| Size Range | M3 – M36 / 1/8" – 1-1/2" | Depending on availability |
| Length | 6 mm – 300 mm / 1/4" – 12" | Custom lengths available |
| Finish | Polished, Passivated, Plain | Optional coating on request |
| Mechanical Properties |
Tensile Strength: 515–750 MPa Yield Strength: 205–250 MPa Elongation: 40% min |
ASTM A193 / A194 |
| Corrosion Resistance | Excellent in chloride and acidic environments | Marine & chemical applications |
| Applications | Chemical processing, Marine, Pharmaceutical, Petrochemical, Food processing | High-chloride and corrosive environments |
Chemical Composition (Typical ranges for SS317L)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Element | Composition (% by Weight) | Notes |
|---|---|---|
| Carbon (C) | ≤ 0.030% | Low carbon (L) reduces carbide precipitation during welding |
| Chromium (Cr) | 18 – 20% | Main alloying element for corrosion resistance |
| Nickel (Ni) | 11 – 14% | Enhances austenitic structure and toughness |
| Molybdenum (Mo) | 3 – 4% | Improves resistance to pitting and crevice corrosion |
| Manganese (Mn) | 2% max | Helps deoxidation and improves strength |
| Silicon (Si) | 1% max | Improves oxidation resistance |
| Phosphorus (P) | 0.045% max | Impurity control |
| Sulfur (S) | 0.030% max | Impurity control |
| Iron (Fe) | Balance | Main matrix of the alloy |
Mechanical Properties (Typical)
| Property | Value | Standard / Notes |
|---|---|---|
| Tensile Strength (UTS) | 515 – 750 MPa | ASTM A193 / A194 |
| Yield Strength (0.2% offset) | 205 – 250 MPa | Depends on fastener type and heat treatment |
| Elongation (min) | 40% | Measured over gauge length |
| Hardness | ≤ 95 HRB (Brinell/Rockwell B) | Typical for annealed condition |
| Density | 7.99 g/cm³ | Typical for SS 317L |
| Melting Point | 1371 – 1399 °C | Austenitic stainless steel range |
| Modulus of Elasticity | 193 GPa | At room temperature |
| Poisson's Ratio | 0.27 – 0.30 | Typical austenitic stainless steel value |
| Operating Temperature | Up to 870 °C (intermittent) | Continuous: 600 – 800 °C depending on environment |
Equivalent Grades
| Standard / Country | Equivalent Grade | Notes |
|---|---|---|
| AISI / SAE (USA) | 317L | Low-carbon austenitic stainless steel |
| ASTM (USA) | A193 / A194 (for bolts, nuts) | Pressure vessel and high-temperature fasteners |
| EN / DIN (Europe / Germany) | X2CrNiMo18-14-3 | Equivalent low-carbon molybdenum stainless steel |
| ISO (International) | ISO 3506-2 / 317L | Standard for corrosion-resistant stainless steel fasteners |
| JIS (Japan) | SUS317L | Japanese Industrial Standard for 317L stainless steel |
| GB / China | 0Cr18Ni12Mo2Ti / 317L | Chinese standard for low-carbon austenitic stainless steel |
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.
| Thread Size | Length (mm) | Thread Pitch (mm) | Hex Head Width (mm) | Approx. Weight (kg/100 pcs) |
|---|---|---|---|---|
| M6 | 12 – 50 | 1.0 | 10 | 2.0 |
| M8 | 16 – 80 | 1.25 | 13 | 4.5 |
| M10 | 20 – 100 | 1.5 | 17 | 9.0 |
| M12 | 25 – 120 | 1.75 | 19 | 14.0 |
| M16 | 30 – 150 | 2.0 | 24 | 30.0 |
| M20 | 40 – 200 | 2.5 | 30 | 55.0 |
| M24 | 50 – 250 | 3.0 | 36 | 90.0 |
| M30 | 60 – 300 | 3.5 | 46 | 170.0 |
| M36 | 80 – 300 | 4.0 | 55 | 280.0 |
Common Types Of Fasteners
Bolts
Nuts
Steel Screw
Washer
Stud Bolts
Frequently Asked Questions (FAQ)
What is Stainless Steel 317L?
Stainless Steel 317L is a low-carbon austenitic stainless steel with enhanced corrosion resistance, especially against chlorides and acidic environments. The "L" denotes low carbon to minimize carbide precipitation during welding.
What types of fasteners are available in 317L?
Common fasteners include bolts, screws, nuts, studs, and washers. They are available in standard and custom sizes with various finishes such as polished, passivated, or plain mill finish.
What are the key applications of 317L fasteners?
They are widely used in chemical processing, marine, pharmaceutical, petrochemical, and food processing industries, especially in high-chloride and corrosive environments.
What standards do 317L fasteners conform to?
They typically conform to ASTM A193/A194 for bolts and nuts and ISO 3506 for general corrosion-resistant stainless steel fasteners. Equivalent grades exist in DIN, JIS, and GB standards.
Pipes & Tubes Supplier
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