Mbemba Stainless is a reputable manufacturer and supplier located in Kinshasa, Congo, known for its top-notch Stainless Steel 321H Bolts. With a strong focus on precision engineering and durability, this company produces bolts that are built to endure extreme conditions and high temperatures. Crafted from high-quality stainless steel, these bolts offer outstanding resistance to oxidation, corrosion, and creep. Mbemba Stainless caters to a variety of industries by delivering dependable fastening solutions that adhere to international standards, making it a go-to partner for clients who value long-lasting performance and consistent quality in Stainless Steel 321H Bolts.
Stainless Steel 321H Bolts are primarily made of iron, with 17–19% chromium, 9–12% nickel, and titanium for stabilization, featuring a higher carbon content than 321 to boost high-temperature strength. They showcase impressive mechanical properties, including a tensile strength of about 515 MPa, yield strength of 205 MPa, and an elongation of 35%. These bolts retain their strength and toughness even at temperatures reaching 870°C, providing exceptional resistance to intergranular corrosion, scaling, and thermal fatigue, making them perfect for heat-intensive industrial applications.
Material | Specification | Standards | Size | Length |
Stainless Steel 321H Bolts | ASTM, ASME and API | ASTM B 193 / ASME SB 193 | M02 to M30 | 3 mm To 200 mm |
| Element | SS 321H |
| Tensile Strength (MPa) min | 480 |
| Yield Strength 0.2% Proof (MPa) min | 275 |
| Elongation (% in 50mm) min | 16 |
| Rockwell B (HR B) max Hardness | 95 |
| Brinell (HB) max Hardness | 201 |
| Element | SS 321H |
| Ni | 0.75 |
| C | 0.15 |
| Mn | 1.00 max |
| P | 0.04 max |
| S | 0.03 max |
| Si | 1.00 max |
| Cr | 11.5 – 13.5 |
| Mo | – |
| N | – |
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Stainless Steel 321H bolts are high-performance fasteners designed for high-temperature environments, offering exceptional resistance to oxidation and corrosion. Ideal for aerospace, chemical processing, and industrial applications requiring durability and reliability.
Custom Stainless Steel 321H Hex Bolt is a custom designed fastener with a hexagonal head, designed for high temperature applications. It provides excellent corrosion resistance and strength, ideal for industrial, aerodynamic and aerospace applications.
Stainless Steel 321H leg bolt features a unique leg design for enhanced stability and support. It offers superior high-temperature and corrosion resistance, making it ideal for demanding industrial and aerospace applications.
Stainless Steel 321H expansion anchor bolt is designed for anchoring in concrete or masonry, providing exceptional high-temperature and corrosion resistance. It expands upon installation for secure, reliable holding in harsh environments.
Stainless Steel 321H Hex Flange Head Bolt connects the hexagonal head with an integrated flange, providing superior thermal corrosion resistance. Ideal for safe clamping in industrial and aerospace applications.
Stainless Steel 321H full threaded bolts feature continuous threading and excellent resistance to high temperatures and corrosion. They are ideal for securing components in demanding industrial, aerospace, and chemical processing environments.
We perform several tough tests to guarantee the reliability and performance of our products. Our Stainless Steel 321H Bolts are checked stringently for quality, and we also offer third-party inspection for added assurance. Our logistics are efficient enough to ensure that our delivery is prompt and on time to meet the demands of our clients without delay.
Stainless Steel 321H Bolts find their place in industries that require high strength along with heat and corrosion resistance. They are particularly suited for petrochemical plants, refineries, heat exchangers, exhaust systems, and power generation units. Additionally, these bolts are used in furnace parts, expansion joints, jet engine components, and chemical processing equipment where stability at elevated temperatures is crucial. Their enhanced performance in environments prone to oxidation and high stress makes them ideal for both industrial and structural applications, ensuring reliability and longevity even in the most demanding operational conditions.
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