Stainless Steel 347/347H Pipe Fittings are engineered to perform in demanding industrial environments where high temperature strength and corrosion resistance are critical. American Metallix Steel Co. manufactures these fittings to meet the evolving needs of industries such as chemical processing, power generation, petrochemicals, and structural engineering. Designed for reliability in high-pressure systems and elevated temperature conditions, these pipe fittings ensure seamless fluid flow, structural integrity, and long service life across complex piping networks.
Stainless Steel 347/347H Pipe Fittings are austenitic stainless steel components stabilized with niobium, which enhances resistance to intergranular corrosion. The 347 grade contains columbium and tantalum that prevent carbide precipitation, while 347H is a higher carbon version designed for improved creep resistance at elevated temperatures. These fittings include elbows, tees, reducers, and caps used in piping systems requiring strength under thermal stress. The material composition typically includes chromium and nickel for corrosion resistance, along with niobium for stabilization. This metallurgical balance allows the fittings to maintain mechanical strength and oxidation resistance even after prolonged exposure to high temperatures. Their microstructure provides excellent weldability and resistance to stress corrosion cracking, making them suitable for fabrication-intensive applications.
Stainless Steel 347/347H Pipe Fittings offer a strong combination of mechanical and chemical properties that make them a preferred choice in critical applications. Their high tensile strength ensures durability under pressure, while excellent corrosion resistance protects against oxidizing environments and chemical exposure. These fittings maintain structural integrity even in cyclic heating conditions, which is essential in thermal processing units and power plants. Their machinability allows for precise fabrication, reducing installation time and improving system efficiency. Cost efficiency is achieved through reduced maintenance and long service life, which minimizes downtime. Over time, their resistance to scaling and oxidation ensures consistent performance, making them a dependable solution for industries requiring long-term reliability.
In the chemical processing industry, Stainless Steel 347/347H Pipe Fittings Manufacturers play a vital role in supplying components that can withstand corrosive chemicals and high-temperature reactions. These fittings are widely used in reactors, heat exchangers, and storage systems where material stability is essential for safe operations. In the oil and gas sector, Stainless Steel 347/347H Pipe Fittings Suppliers provide fittings used in pipelines and refining systems exposed to high pressure and aggressive environments. Their resistance to oxidation and thermal fatigue ensures uninterrupted flow and operational safety.
Within power plants, Stainless Steel 347/347H Pipe Fittings Stockists support infrastructure involving boilers, superheaters, and steam lines. These fittings perform reliably under extreme heat and pressure, making them suitable for both fossil fuel and nuclear energy facilities. For global infrastructure and engineering projects, Stainless Steel 347/347H Pipe Fittings Exporters deliver high-quality fittings used in structural piping, marine systems, and industrial fabrication. Their adaptability and compliance with international standards make them ideal for export-oriented applications.
Stainless Steel 347/347H Pipe Fittings are manufactured in compliance with globally recognized standards such as ASTM A403 for wrought stainless steel pipe fittings and ASME SA403 for pressure applications. These standards define chemical composition, mechanical properties, and testing requirements to ensure consistent quality. The 347 and 347H grades are also aligned with ASME Boiler and Pressure Vessel Code requirements, making them suitable for high-pressure and high-temperature service conditions.
Steel products including bars, pipes, tubes, plates, sheets, and coils are classified under various international standards to maintain consistency in quality and performance. ASTM and ASME standards are widely used in North America, while EN and DIN standards are common in Europe. JIS standards govern Japanese steel products, and ISO provides global harmonization. These classifications define dimensions, tolerances, chemical composition, and mechanical properties. For example, stainless steel pipes and tubes are categorized based on manufacturing methods such as seamless or welded, while plates and sheets are defined by thickness and finishing processes. This standardized naming system helps engineers and buyers select the right material for industrial fabrication and structural applications.
American Metallix Steel Co.is a leading manufacturer and supplier of Stainless Steel 347 Pipe Fittings, SS 347H Butt Weld Fittings, ASTM A403 WP347 Elbows, Tees, Reducers, and high-performance corrosion-resistant fittings at competitive prices.
Request Latest Price & Stock AvailabilityStainless Steel 347/347H Pipe Fittings are available in different standards, grades, types, sizes, bending radii, schedules, pressure classes and dimensions as specified below.
| Specification | Details |
|---|---|
| Standard | ASTM A403 / ASME SA403 |
| Grades | WP347, WP347H |
| Types | Seamless / Welded / Fabricated |
| Buttweld Fittings Size | 1/2" to 48" |
| Forged Fittings Size | 1/4” to 4” |
| Bending Radius | R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom |
| Wall Thickness / Schedule | Sch 5s, 10s, 40s, 80s, 10, 20, 40, STD, 60, 80, XS, 100, 120, 140, 160, XXS |
| Pressure Class (Forged) | 2000 LBS, 3000 LBS, 6000 LBS, 9000 LBS |
| Dimensions | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, MSS SP-75 |
Stainless Steel 347/347H Pipe Fittings are available in the standards, grades, types, sizes, bending radii, wall thicknesses, pressure classes and dimensions listed in the specification table above.
The chemical composition of Stainless Steel 347/347H Pipe Fittings is represented by the specified values for carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel and Cb + Ta.
| Grade | C | Mn | Si | P | S | Cr | Ni | Cb + Ta |
|---|---|---|---|---|---|---|---|---|
| SS 347 (WP347) | 0.08 max | 2.00 max | 0.75 max | 0.045 max | 0.030 max | 17.0-19.0 | 9.0-13.0 | 10 x C min |
| SS 347H (WP347H) | 0.04-0.10 | 2.00 max | 0.75 max | 0.045 max | 0.030 max | 17.0-19.0 | 9.0-13.0 | 8 x C min |
The table above presents the chemical composition values supplied for Stainless Steel 347/347H Pipe Fittings, including carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel and Cb + Ta.
The mechanical properties of Stainless Steel 347/347H Pipe Fittings include tensile strength, yield strength, elongation and hardness values as provided below.
| Grade |
Tensile Strength
(min) |
Yield Strength
(min) |
Elongation in 2"
(min) |
Hardness
(max) |
|---|---|---|---|---|
| WP347/347H |
75 (515)
ksi (MPa) |
30 (205)
ksi (MPa) |
35
% |
95
Rockwell B |
The table presents the tensile strength, yield strength, elongation and maximum hardness values supplied for Stainless Steel 347/347H Pipe Fittings.