Mbemba Stainless is a reputable manufacturer and supplier located in Kinshasa, Congo, specializing in high-quality Stainless Steel 321 / 321H Fasteners. With a strong emphasis on innovation and precision engineering, this company provides fasteners that are built for outstanding performance in tough environments. Renowned for their durability, resistance to corrosion, and stability under heat, these fasteners comply with international standards and serve a variety of industrial needs. Mbemba Stainless is committed to delivering dependable fastening solutions for industries like chemical processing, petrochemical, power generation, and construction, ensuring strength and efficiency in every application.
Stainless Steel 321 / 321H Fasteners are titanium-stabilized austenitic stainless steels that contain 17–19% chromium, 9–12% nickel, along with trace amounts of titanium and carbon. This unique composition boosts their resistance to intergranular corrosion and oxidation at high temperatures. They showcase impressive tensile strength (minimum 515 MPa), yield strength (minimum 205 MPa), and elongation of up to 40%. The “H” variant, which has a higher carbon content, enhances high-temperature strength and creep resistance, making these fasteners perfect for thermal and high-stress applications.
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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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.
These Stainless Steel 321 / 321H Fasteners are extensively used in environments that are both high-temperature and corrosive. Their exceptional resistance to oxidation and creep makes them ideal for industries such as aerospace, chemical processing, refining, and marine. You’ll often find them in exhaust manifolds, furnace components, expansion joints, heat exchangers, and thermal oxidizers. These fasteners maintain their strength and shape even after prolonged exposure to heat. Their excellent weldability, formability, and resistance to scaling make them the go-to choice for demanding engineering and industrial applications that require both durability and reliability.
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