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Stainless Steel 347 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 347 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 347 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 347 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 347 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 347 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 347 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 |
|---|---|
| Material Grade | Stainless Steel 347 (SS347) |
| Standards | ASTM A193, ASTM A194, ASTM F593, ISO 3506 |
| Type | Bolts, Nuts, Screws, Studs, Washers |
| Thread Type | Full Thread / Partial Thread |
| Sizes | M4 to M48 / 1/4" to 2" |
| Length | 6 mm to 500 mm / 1/4" to 20" |
| Surface Finish | Polished, Passivated, Plain, Hot Dip Galvanized |
| Application | High temperature & corrosion-resistant industrial environments |
| Temperature Range | -196°C to 870°C (-321°F to 1598°F) |
| Corrosion Resistance | Excellent in oxidizing and mildly reducing environments |
Chemical Composition (Typical ranges for SS347)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Element | Percentage (%) |
|---|---|
| Carbon (C) | 0.08 max |
| Manganese (Mn) | 2.0 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.03 max |
| Silicon (Si) | 1.0 max |
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 9.0 – 13.0 |
| Niobium (Nb) | 10 x C min (0.10% max) |
| Iron (Fe) | Balance |
Mechanical Properties (Typical)
| Property | Value / Range |
|---|---|
| Hardness (HRB) | 79 max |
| Proof Stress / Yield Strength (MPa) | ≥ 205 |
| Tensile Strength (MPa) | 515 – 827 |
| Elongation (%) | 40 min |
| Impact Strength (Charpy V-Notch) | ≥ 27 J at room temperature |
| Modulus of Elasticity (GPa) | 193 |
| Shear Strength (MPa) | ≈ 320 |
| Fatigue Strength (MPa) | ≈ 240 |
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM / ASME | SAF 347, A193 / A194 B8, F593 |
| EN / DIN | 1.4550 / X6CrNiNb17-12 |
| JIS | SUS 347 |
| GB / China | 0Cr18Ni12Nb |
| UNS | S34700 |
| ISO | ISO 3506 / 347 |
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 Size | Thread Pitch | Length | Head / Nut Size | Weight (kg per 100 pcs) |
|---|---|---|---|---|
| M4 | 0.7 | 16 – 50 mm | 7 mm | 0.4 |
| M6 | 1.0 | 20 – 60 mm | 10 mm | 0.9 |
| M8 | 1.25 | 25 – 80 mm | 13 mm | 1.9 |
| M10 | 1.5 | 30 – 100 mm | 17 mm | 3.5 |
| M12 | 1.75 | 35 – 120 mm | 19 mm | 5.8 |
| M16 | 2.0 | 40 – 150 mm | 24 mm | 11.2 |
| M20 | 2.5 | 50 – 200 mm | 30 mm | 19.5 |
| M24 | 3.0 | 60 – 250 mm | 36 mm | 30.0 |
| M30 | 3.5 | 80 – 300 mm | 46 mm | 55.0 |
| M36 | 4.0 | 100 – 350 mm | 55 mm | 85.0 |
Common Types Of Fasteners
Bolts
Nuts
Steel Screw
Washer
Stud Bolts
Frequently Asked Questions (FAQ)
What is Stainless Steel 347 Fastener?
Stainless Steel 347 Fasteners are high-performance fasteners made from SS 347 alloy, known for excellent corrosion resistance and stability at high temperatures. They are widely used in industrial and chemical applications.
What are the common types of SS 347 Fasteners?
Common types include bolts, nuts, screws, studs, and washers, available in various sizes and thread types.
What are the chemical components of SS 347 Fasteners?
SS 347 contains Chromium (17–19%), Nickel (9–13%), Niobium (stabilizer), and small amounts of Carbon, Manganese, Silicon, Phosphorus, and Sulfur, with Iron as the balance.
What are the mechanical properties of SS 347 Fasteners?
Typical properties include tensile strength of 515–827 MPa, yield strength ≥ 205 MPa, elongation ≥ 40%, hardness up to HRB 79, and excellent high-temperature performance.
Where are SS 347 Fasteners used?
They are ideal for high-temperature and corrosive environments such as chemical processing, petrochemical plants, power plants, and aerospace applications.
Pipes & Tubes Supplier
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