Andre Stainless is a reliable manufacturer and supplier of **Stainless Steel 321 / 321H Fasteners** based in Pulau Ujong, Singapore. They specialize in providing heat-resistant and corrosion-resistant fastening solutions tailored for high-temperature applications. Stainless Steel 321 is a titanium-stabilized austenitic stainless steel that effectively combats intergranular corrosion, while 321H is its high-carbon counterpart, designed for improved creep strength and durability when exposed to prolonged heat. Andre Stainless offers a comprehensive range of fasteners—including bolts, nuts, washers, studs, and screws—meticulously engineered to comply with international standards. Known for their unwavering quality and dependable service, Andre Stainless caters to various industries, including aerospace, petrochemicals, refineries, and thermal processing.
The Stainless Steel 321 / 321H Fasteners produced by Andre Stainless typically feature 17–19% Chromium and 9–12% Nickel, with Titanium added to enhance the alloy’s stability against carbide precipitation. The Grade 321H variant has a higher carbon content (0.04–0.10%) to boost its strength at elevated temperatures. These fasteners boast impressive mechanical properties, including a tensile strength of 515 MPa, yield strength of 205 MPa, and remarkable resistance to scaling and oxidation at temperatures up to 900°C. Their austenitic structure ensures excellent weldability, toughness, and resistance to thermal fatigue.
Specification : ASTM F593, F594, F1554 / ASME SF593, F594, F1554
Standard : DIN, ASTM, BS and all International Standards
Bolt / Screw Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Nuts Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Washers Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Machine Screws Size : M1.6 – M12
Self Tapping Screw Size : No.2 – No. 14
Length : 3 mm to 200 mm
Types : Nuts, Bolts, Screws, Stud Bolts, Hex Set Screw, Socket Screw, Cap Screw, Pan Head Screw, Machine Screw, Socket Head Cap Screw, Allen Cap screw, Wing Screw, Washers, Spring Washers, Studs, Anchors, Marine Anchors, Nut, Hexagon Nut, Hex Nut, Hex Coupling Nut, Hex Domed Cap Nuts, Square Nut, Stud Bolts, Hex Head Bolts, Socket Hexagon Head Screw Anchor Bolt, U- Bolts, J Bolts, Mushroom Head Square Neck Bolts, T-Head Bolts, Wing Screw, Eye Bolt, Foundation Bolts, Structural Bolts.
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti |
| SS 321 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 5(C+N) – 0.70 max |
| SS 321H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 4(C+N) – 0.70 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
Contact us to get a quick quote for your requirement.
Stainless Steel 321 Nuts offer excellent resistance to oxidation and corrosion, particularly in high-temperature environments. They are typically available sizes from M6 to M36, with various thread standards. They are commonly used in aerospace and industrial applications where high temperatures are prevalent.
Stainless Steel 321H Stud Bolts provide outstanding oxidation and chemical corrosion resistance, especially in high-temperature conditions. They usually come in lengths from 50 mm to 300 mm and diameters from M8 to M30. Ideal for high-stress environments in chemical processing and aerospace industries.
Stainless Steel 321H Bolts offer high resistance to corrosion and oxidation in elevated temperatures. They are available in sizes ranging from M6 to M36, tailored to specific length requirements, and are widely used in structural and high-temperature applications.
Stainless Steel 321 and 321H threaded rods are designed to resist corrosion and oxidation in harsh environments. They typically come in lengths from 100 mm to 1000 mm and diameters from M6 to M30. Suitable for structural and high-temperature applications.
Stainless Steel 321 screws provide excellent resistance to rust and oxidation, especially at elevated temperatures. They are available in various sizes from M2 to M20 and are often used in applications where resistance to heat and corrosion is critical.
Stainless Steel 321H washers offer strong resistance to corrosion and high temperatures. They come in sizes that match common bolt and nut dimensions, typically from M6 to M36. It is ideal for use in high-temperature applications and aggressive environments.
We pay immense attention at the time of packing of these Stainless Steel 321/321H Fasteners to ensure these are delivered in good condition at the doorstep of our customers. We use high-quality packing materials that meet the industry standards, such as strong wooden boxes, durable pallets, and eco-friendly packaging options. This careful packing prevents dirt, dust, or contaminants from affecting the fasteners, thus preserving their superior quality. Moreover, our robust packaging safeguards the products during transit, minimizing the risk of damage or contamination. Detail attentiveness and the commitment to quality assurance reflect a commitment to offering the best quality products to the valued customers.
You’ll find that Stainless Steel 321 / 321H Fasteners from Andre Stainless are commonly utilized in high-temperature environments like heat exchangers, exhaust manifolds, furnace components, boilers, and pressure vessels. Their outstanding resistance to thermal stress and intergranular corrosion makes them perfect for continuous operation in high-temperature settings. These fasteners are especially beneficial in welded assemblies and applications where long-term structural integrity is crucial. Andre Stainless offers fasteners in a variety of dimensions, threads, and finishes to meet specific industrial needs.
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