Khaled Stainless, a well-regarded manufacturer and supplier located in Cairo, Egypt, specializes in top-notch Stainless Steel 347H Flanges designed for high-temperature and high-pressure applications. This type of stainless steel, known as SS 347H, is a high-carbon, stabilized austenitic alloy that offers enhanced creep strength and resists carbide precipitation when exposed to prolonged heat. Khaled Stainless guarantees precise machining, dimensional accuracy, and compliance with international flange standards, ensuring reliable performance in tough industrial settings. These 347H Flanges are commonly found in petrochemical, power generation, chemical processing, and refinery operations, where exceptional strength, corrosion resistance, and long-lasting durability are vital for secure pipeline connections.
Stainless Steel 347H Flanges are made up of 17–19% Chromium, 9–13% Nickel, and a higher Carbon content, along with Niobium/Tantalum stabilizers that help prevent intergranular corrosion at high temperatures. The increased carbon content enhances creep resistance and boosts high-temperature strength. SS 347H exhibits excellent tensile and yield properties, good ductility, and strong oxidation resistance even under continuous heat exposure. It provides stable mechanical performance, outstanding weldability, and structural reliability during thermal cycling, making it ideal for flange assemblies that require strength, heat resistance, and long-term integrity.
| 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 are extensively used in industries that operate under high temperatures and pressures, where resistance to oxidation, creep, and carbide precipitation is crucial. You’ll find them in applications like petrochemical piping, refinery heater tubes, high-temperature steam systems, boiler equipment, heat exchangers, and superheater/reheater sections. These flanges are also essential in chemical processing plants, power generation facilities, and aerospace applications, where their durability and reliability are key to maintaining safe and efficient operations.
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