Njabulo Stainless, located in Cape Town, South Africa, is a reputable manufacturer and supplier of top-notch Stainless Steel 321H Bolts. Known for their precision engineering and outstanding performance, this company delivers fastening solutions that adhere to international standards across a variety of industries. With a keen emphasis on durability, corrosion resistance, and reliability, Njabulo Stainless guarantees that each bolt is designed to endure tough environments. Their cutting-edge manufacturing processes and rigorous quality control make them the go-to choice for clients in need of trustworthy stainless steel fasteners for industrial, marine, and construction projects throughout South Africa and beyond.
Stainless Steel 321H Bolts are titanium-stabilized austenitic stainless steel fasteners that boast a high carbon content, enhancing their strength at elevated temperatures. Typically, their composition includes chromium (17–19%), nickel (9–12%), carbon (0.04–0.10%), and titanium (at least five times the carbon content). These bolts showcase impressive mechanical properties, with a tensile strength of around 515 MPa and a yield strength of about 205 MPa. They also provide excellent creep and stress rupture resistance, good oxidation stability up to 870°C, and remarkable toughness even in cryogenic conditions.
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.
These Stainless Steel 321H Bolts are widely utilized in industries where high temperature and corrosion resistance are essential. They are perfect for applications in petrochemical processing, refineries, heat exchangers, exhaust systems, and furnace components. Their stability against carbide precipitation makes them ideal for continuous service within the temperature range of 427–816°C. Additionally, these bolts find extensive use in power generation plants, food processing equipment, and aerospace applications. Njabulo Stainless’s 321H Bolts ensure secure, long-lasting fastening in demanding operational settings, making them indispensable for projects that require strength, reliability, and resistance to oxidation and thermal stress.
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