Lecong Stainless stands out as a top manufacturer and supplier based in Da Nang, Vietnam, specializing in high-quality Stainless Steel 347H Flanges. These flanges are crafted for exceptional corrosion resistance, impressive high-temperature strength, and long-lasting durability. Made from titanium-stabilized austenitic stainless steel, Stainless Steel 347H is specifically designed to combat intergranular corrosion and maintain its mechanical integrity even when exposed to high temperatures for extended periods. Each flange is precision-engineered to meet international standards, making them perfect for critical piping connections in sectors like power generation, chemical processing, and various industrial applications. Lecong Stainless is committed to delivering consistent quality through cutting-edge production methods and rigorous quality control.
The composition of Stainless Steel 347H Flanges includes iron, chromium (17–19%), nickel (8–12%), and titanium for stabilization, along with manganese, silicon, and a controlled amount of carbon. The titanium stabilization helps prevent carbide precipitation during welding, boosting corrosion resistance and preserving mechanical strength at elevated temperatures. These flanges boast impressive mechanical properties, including a tensile strength ranging from 515 to 750 MPa, yield strength between 205 and 275 MPa, and outstanding creep and oxidation resistance up to 700°C. Thanks to their austenitic structure, they offer toughness, dimensional stability, and reliable performance even under high-temperature and high-pressure conditions.
| 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.
Stainless Steel 347H Flanges find their place in various industries that demand durable, high-temperature, and corrosion-resistant piping connections. They’re commonly used in boilers, heat exchangers, high-pressure pipelines, and chemical processing facilities. In the petrochemical and power generation sectors, you’ll find them in reactor lines, process piping, and pressure vessel connections. Their strength and thermal stability also make them ideal for marine, aerospace, and industrial equipment applications. Plus, Stainless Steel 347H Flanges are utilized in food processing and pharmaceutical systems where high-temperature performance and corrosion resistance are crucial.
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