Harshita Stainless, a well-respected name in the stainless steel sector located in Delhi, India, stands out as a top manufacturer and supplier of Stainless Steel 347H Bolts. With a strong dedication to quality, innovation, and precision engineering, Harshita Stainless delivers high-performance bolts that are specifically designed for high-temperature and pressure applications. Their SS 347H bolts are crafted using cutting-edge technology and meet international quality standards, ensuring they are both reliable and durable. The company prioritizes customer satisfaction, timely deliveries, and custom specifications, serving essential industries like petrochemical, power generation, aerospace, and marine with top-notch fastening solutions.
Stainless Steel 347H is a high-carbon, niobium-stabilized austenitic stainless steel alloy that contains 17–19% chromium, 9–13% nickel, and 0.04–0.10% carbon, with niobium/tantalum added for stabilization. The increased carbon content boosts high-temperature strength. SS 347H bolts boast a tensile strength of 515–620 MPa, a yield strength of around 205–275 MPa, and an elongation of about 40%, with hardness levels between 80–85 HRB. This grade is known for its excellent resistance to intergranular corrosion, creep, and stress rupture at high temperatures, making it perfect for applications that face continuous high heat and mechanical stress.
Material | Specification | Standards | Size | Length |
Stainless Steel 347H Bolts | ASTM, ASME and API | ASTM B 193 / ASME SB 193 | M02 to M30 | 3 mm To 200 mm |
| Element | SS 347H |
| 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 347H |
| 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 347H Bolts are high strength, heat resistant fasteners designed for extreme temperatures and hot environments. They provide excellent oxidation properties and durability, ideal for aerospace and industrial applications.
Custom Stainless Steel 347H Hex Bolt is a high heat resistance fastener with a hexagonal head, tailored to specific dimensions. Provides exceptional durability and resistance to extreme heat applications.
Stainless Steel 347H Leg Bolt is a durable high heat resistant fastener with a long threaded shaft and flat head, engineered for durability and stability in extremely hot conditions in
Stainless Steel 347H Expansion Anchor Bolt is a heat-resistant fastener for concrete or masonry. It expands in the hole as it tightens, providing a firm grip.
Stainless Steel 347H Hex Flange Head Bolt features a hexagonal head with an integrated flange for improved weight distribution. Provides superior thermal resistance and durability to extreme temperatures and environmental corrosion.
Stainless steel 347H fully threaded bolts have threads running the full length, for permanent clamping ability and superior heat resistance. They are ideal for demanding applications that require durability and heat resistance.
we prioritize quality and reliability by conducting rigorous in-house testing on all our products to ensure they meet the highest standards. Our comprehensive testing procedures include material and performance evaluations, ensuring optimal durability and performance. Additionally we offer third-party inspection services to provide further assurance to our customers. With a commitment to prompt delivery. We ensure that all orders are processed efficiently and shipped on time, meeting the needs of our clients without compromise.
Stainless Steel 347H Bolts are perfect for high-temperature and high-pressure settings, particularly where thermal cycling is frequent. They are commonly found in boilers, heat exchangers, superheaters, pressure vessels, and piping systems within petrochemical and power generation facilities. Thanks to their high-carbon content and niobium stabilization, these bolts offer exceptional resistance to intergranular corrosion and creep, ensuring reliability in long-term elevated temperature service. Additionally, they are utilized in aerospace components, chemical processing equipment, and furnaces, showcasing their versatility and dependability in demanding environments.
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