Chanchai Stainless supplies Stainless Steel 321H Bolts in Bangkok, Thailand. These bolts are designed for excellent high-temperature performance and stability. With higher carbon content than standard 321, grade 321H offers better creep strength and durability under prolonged heat. Stabilized with titanium, these bolts resist carbide precipitation during welding and heat exposure, ensuring secure fastening in tough service conditions. Stainless Steel 321H Bolts are widely used in chemical, refinery, and aerospace industries where thermal stability and corrosion resistance are key. Chanchai Stainless manufactures 321H bolts to global standards, delivering long-lasting fastening solutions with reliability and strength.
Stainless Steel 321H bolts include chromium (17–19%), nickel (9–12%), titanium stabilizers, and higher carbon (0.04–0.10%). The increased carbon boosts creep resistance and strength in high temperatures. Their mechanical properties include a tensile strength of 515 MPa, a yield strength of around 205 MPa, and elongation of about 40%. Titanium stabilizes the alloy against sensitization, improving weldability. These bolts resist oxidation up to 870°C and deliver reliable performance in high-temperature 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.
Stainless Steel 321H bolts are widely used in boilers, heat exchangers, and superheaters because of their excellent high-temperature resistance. They are found in chemical plants, refineries, and power generation facilities that need secure fastening in thermal environments. Aerospace and automotive industries use them in exhaust systems and high-temperature structural applications. The food and pharmaceutical sectors rely on them in sterilizers and clean processing environments. Stainless Steel 321H bolts ensure durable fastening solutions where oxidation resistance, strength, and creep stability are important.
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