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Mira Fasteners stands out as a top-notch manufacturer and supplier of Stainless Steel 321 / 321H Stud Bolts, proudly based in Kuala Lumpur, Malaysia. These stud bolts are designed to thrive in tough environments where intergranular corrosion resistance and high-temperature strength are crucial. The SS 321 variant is stabilized with titanium, while the SS 321H version has a higher carbon content for enhanced creep resistance. Mira Fasteners caters to various industries, including aerospace, petrochemical, thermal processing, and power generation throughout Malaysia and Southeast Asia, guaranteeing high performance, durability, and adherence to international standards.
When it comes to composition, Stainless Steel 321 / 321H Stud Bolts mainly consist of 17–20% chromium and 9–13% nickel, with titanium added (at least five times the carbon content) for stabilization. The 321H grade features a higher carbon content (0.04–0.10%) to boost high-temperature strength. These stud bolts deliver a tensile strength ranging from 515 to 700 MPa and are perfect for applications in temperatures reaching up to 870°C, providing remarkable thermal stability and weldability.
| Grade | Stainless Steel 321 |
| Specifications | ASTM A193 / ASME SA193, DIN, ASTM, BS and all International Standards |
| Length | 3mm to 200mm |
| Size | M 02 to M 160, Custom Sizes |
| Types | Threaded Rod, Class A double ended stud, Tie Rod, Double Ended Stud, Stud Bolts, Bronze Hex Studs, Threaded Studs etc |
| Element | Ni | C | Mn | P | S | Si | Cr |
| SS 321 | 9.00 – 12.00 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0-19.0 |
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| SS 321 | 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 40 % |
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Stainless steel 321/321H stud bolts are used at high temperatures where strength and corrosion resistance are critical. They are ideal for aerospace, automotive exhaust systems and high-temperature gasoline engines. These stud bolts are also used in chemical plants because of their resistance to sulfuric and phosphoric acid. Their durable materials ensure reliability in harsh environments, making them essential for industrial applications that require durability and operation at high temperatures
You’ll find Stainless Steel 321 / 321H Stud Bolts in a variety of applications, such as heat exchangers, exhaust systems, furnace components, pressure vessels, and chemical processing equipment. They excel in situations that involve frequent thermal cycling and exposure to high-temperature gases. The titanium stabilization in SS 321 effectively prevents carbide precipitation during welding, while the increased carbon in SS 321H improves creep resistance. These characteristics make them an excellent choice for fastening in critical systems that endure prolonged heat and stress.
Mira Fasteners is a leading manufacturer and supplier of high-quality fasteners in Kuala lumpur, Malaysia, with over 8 years of experience serving global industries.
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