Kyaw Stainless, located in Naypyidaw, Myanmar, has made a name for itself as a top-notch manufacturer and supplier of high-quality Stainless Steel 321/321H Fasteners. With a strong dedication to excellence, this company crafts durable and precision-engineered fasteners that are perfect for a wide range of industrial applications. These fasteners are specifically designed to provide exceptional resistance to corrosion, oxidation, and high-temperature environments. Kyaw Stainless takes pride in ensuring that every product meets international standards, guaranteeing reliable performance and longevity. With a solid reputation among clients across various industries, Kyaw Stainless consistently delivers innovative fastening solutions that blend strength, durability, and precision, even in the most demanding operating conditions.
Stainless Steel 321/321H Fasteners are titanium-stabilized austenitic stainless steels, primarily made up of chromium (17–19%), nickel (9–12%), and titanium (up to 0.7%). The 321H grade features a higher carbon content, enhancing its strength at elevated temperatures. These fasteners boast impressive mechanical properties, including a tensile strength of around 515 MPa and a yield strength of approximately 205 MPa, along with good elongation and hardness. They excel in resisting intergranular corrosion, oxidation, and creep, making them ideal for high-stress, high-temperature service environments.
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 % |
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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.
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.
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.
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.
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.
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.
You’ll find Stainless Steel 321/321H Fasteners widely used in industries that require exceptional corrosion and heat resistance. Common applications include heat exchangers, exhaust manifolds, furnace components, and expansion joints in chemical processing, oil refining, and power generation plants. Their ability to maintain mechanical integrity under high-temperature conditions makes them a great fit for the aerospace, marine, and automotive sectors as well. Additionally, these fasteners are essential in pipelines, pressure vessels, and boiler equipment, where resistance to oxidation and scaling is vital for long-term performance and reliability.
Kyaw Stainless provides Stainless Steel 321/321H Fasteners with test reports that guarantee their chemical composition, mechanical properties, and quality as per international standards. The fasteners are properly packed in wooden crates, plastic boxes, or special packaging to prevent corrosion and damage during shipping. They come in different sizes and specifications and are stored and shipped with complete traceability. Kyaw Stainless ensures prompt domestic and overseas delivery with strict quality control measures to offer high-performance fastening solutions for demanding industrial applications.
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