Based in Delhi, India, Harshita Stainless is a well-known producer and supplier of 347H stainless steel flanges, providing dependable, high-temperature solutions for vital piping systems. Stabilised austenitic stainless steel, which is used in the production of these flanges, offers exceptional resistance to oxidation and intergranular corrosion in high temperature settings. Harshita Stainless offers products with accurate dimensions, strong construction, and excellent weldability while guaranteeing rigorous adherence to international standards. The company, which serves the petrochemical, oil and gas, power generation, and heat exchanger industries, is renowned for its quality-driven approach, prompt delivery, and capacity to meet the needs of both domestic and international clients.
For enhanced high-temperature strength, stainless steel 347H flanges have a higher carbon content (0.04–0.10%) than regular 347 and are made of chromium (17–20%), nickel (9–13%), and columbium (niobium). As the base, manganese, silicon, and iron are minor elements. With a tensile strength of roughly 515 MPa, a yield strength of roughly 205 MPa, and an elongation of 35–40%, these flanges have exceptional mechanical qualities. The alloy is appropriate for flanges subjected to high-pressure and high-temperature environments because of its strong creep resistance, oxidation resistance, and stability under thermal cycling.
| Standard | ASTM A182 / ASME SA182 |
| Dimensions | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN |
| Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges |
| Size | 1/2″ (15 NB) to 48″ (1200NB) |
| Class/Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 |
| Flange Face Type | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| Grade | C | Mn | Si | P | S | Cr | Cb | Ni | Fe |
| 347H | 0.08 | 2.0 | 1.0 | 0.045 | 0.030 | 17.00 – 20.00 | 10xC – 1.10 | 9.00 – 13.00 | 62.74 min |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 347H | 515 | 205 | 35 | 92 | 201 |
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SS 347Hsocket weld flanges, manufactured from stainless steel alloy 347H, ensure secure pipe connections with enhanced corrosion resistance and high-temperature strength, suitable for high-pressure systems in various industries.
SS 347H ring type joint flanges, constructed from stainless steel alloy 347H, provide leak-proof connections with excellent corrosion resistance and high-temperature performance, ideal for high-pressure and critical service applications.
SS 347H forged flanges, made from stainless steel alloy 347H, offer superior strength, excellent corrosion resistance, and high-temperature endurance, making them ideal for demanding industrial applications and high-pressure environments.
We conduct various rigorous tests, including dimensional, mechanical, and chemical analysis, to ensure the highest quality of our Stainless Steel 347H Flanges. Our in-house quality control team oversees all processes, complemented by third-party inspections to guarantee compliance with industry standards. With a commitment to prompt delivery we ensure that our clients receive their products on time, every time.
In many different industries, stainless steel 347H flanges are frequently utilised in corrosive and high-temperature settings. They are used in heat exchanger systems, refineries, and processing facilities in the petrochemical and oil and gas industries. They are used in turbine systems, steam pipelines, and boiler headers in power plants. Because they can withstand oxidation and intergranular corrosion at high temperatures, they are also perfect for furnace parts, superheaters, exhaust manifolds, and chemical processing equipment. They are a crucial part of high-stress and thermal applications because of their high creep strength and durability, which guarantee dependable performance under trying circumstances.
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