Nakamura Stainless, located in Pulau Ujong, Singapore, manufactures and supplies high-quality stainless steel products, including stainless steel 347 flanges. These flanges are well-known for their strong resistance to intergranular corrosion, high-temperature strength, and dependable performance in welded conditions. Stabilized with niobium, stainless steel 347 flanges work well in situations that involve frequent heating and cooling cycles. Nakamura Stainless ensures precise engineering and strict quality control, making their 347 flanges suitable for important applications in chemical processing, power generation, aerospace, and high-temperature piping systems.
Stainless steel 347 flanges consist of an austenitic stainless steel alloy that includes about 17 to 19% chromium, 9 to 13% nickel, and niobium (columbium) as a stabilizing element. This mixture helps prevent chromium carbide formation during welding, improving resistance to intergranular corrosion. The flanges provide a tensile strength of approximately 520 to 750 megapascals and keep their mechanical properties at high temperatures up to 870°C. With good weldability, thermal stability, and resistance to corrosion, stainless steel 347 flanges are ideal for high-stress, high-temperature situations that need long-term structural strength.
| 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 |
| 347 | 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 | ||||
| 347 | 515 | 205 | 35 | 92 | 201 |
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SS 347 socket weld flanges, manufactured from stainless steel alloy 347, ensure secure pipe connections with enhanced corrosion resistance and high-temperature strength, suitable for high-pressure systems in various industries.
SS 347 ring type joint flanges, constructed from stainless steel alloy 347, provide leak-proof connections with excellent corrosion resistance and high-temperature performance, ideal for high-pressure and critical service applications.
SS 347 forged flanges, made from stainless steel alloy 347, offer superior strength, excellent corrosion resistance, and high-temperature endurance, making them ideal for demanding industrial applications and high-pressure environments.
We offers the best quality Stainless Steel 347 Flanges which has undergone intense testing to produce top quality and performance. The flange is thoroughly tested for meeting international standards and specifications. Products supplied by us are certified by recognized authorities for traceability and reliability in each batch. With modern technology and strict quality control, we ensure durability, corrosion resistance, and good mechanical properties. Nakamura Stainless stands by the delivery of flanges with the highest level of industry standards in functionality and safety.
Stainless steel 347 flanges are commonly used in settings that need heat and corrosion resistance, especially in systems that experience repeated thermal cycling. Typical applications include pressure vessels, heat exchangers, furnace components, superheaters, and high-temperature pipelines in the petrochemical and power generation industries. These flanges are also appropriate for aircraft exhaust systems and chemical processing equipment. Their ability to maintain structural strength and resist intergranular corrosion after welding makes them a trustworthy choice for joining piping and equipment in critical, heat-intensive work.
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