Stainless Steel 347/347H Pipe Fittings are widely used in various industrial applications due to their exceptional properties. These fittings are made of austenitic stainless steel, and the main difference between grades 347 and 347H is their carbon content. The 347H grade contains more carbon than SS 347.
Properties
The microstructure of columbium in these fittings offers higher creep and stress rupture resistance. They also exhibit high thermal stability, resistance to carbide precipitation, aqueous corrosion, and intergranular corrosion. These fittings are non-magnetic in the annealed condition and can be hardened by cold working. They offer high tensile strength and are useful in pressure vessels, boilers, furnaces, and more.
Table of Content
Chemical Composition
Stainless Steel 347/347H Pipe Fittings contain carbon, manganese, silicon, phosphorous, sulfur, chromium, nickel, iron, and columbium. Columbium and tantalum elements provide intergranular corrosion resistance, making these fittings suitable for high-temperature applications. Stainless Steel 347/347H Pipe Fittings contain more chromium, nickel, and columbium than other austenitic stainless steel grades. The carbon content in these fittings also plays a crucial role in their mechanical and physical properties. The 347H grade has a higher carbon content than SS 347, which improves its high-temperature strength and creep resistance.
Applications
Stainless Steel 347/347H Pipe Fittings apply in compression fittings, heat exchangers, condensers, chemical processing industries, marine industry, pulp, paper plants, pharmaceuticals, and more. Stainless Steel 347/347H Pipe Fittings find their application in various industries due to their exceptional properties. In the chemical processing industry, these fittings are used in equipment and piping systems that come into contact with corrosive fluids or gases. They are also widely used in heat exchangers and condensers due to their high thermal stability and excellent corrosion resistance. The marine industry uses these fittings in seawater desalination plants and offshore oil and gas platforms. They are also used in pulp and paper plants, pharmaceuticals, and many other industries.
Kalp Industries is a renowned name in India, providing a wide range of Stainless Steel 347/347H Pipe Fittings manufactured using various alloys and grades. These fittings are highly reliable and meet the demands of numerous industrial applications. Many buyers prefer these fittings due to their exceptional properties and unique characteristics of these alloys. We also offer products like UNS S32100 Pipe Fittings and 904L SS Pipe Fittings, widely used in many commercial applications.
Standards | ASTM A403 / ASME SA403 |
Dimensions | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS4504, BS1560, BS10 |
Size |
|
Type | Seamless / Welded / Fabricated |
Thickness | SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75 |
Bending Radius | R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom |
STANDARD | WERKSTOFF NR. | UNS | JIS | GOST | EN |
SS 347 | 1.4550 | S34700 | SUS 347 | 08Ch18N12B | X6CrNiNb18-10 |
SS 347H | 1.4961 | S34709 | SUS 347H | – | X6CrNiNb18-12 |
All Fittings | 90°and 45° Ells and Tees | Reducers and Lap Joint Stub | Caps | 180° Returns | Angularity Tol | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Nominal Pipe Plane Size (NPS) | Outside(1) Diameter at Bevel | Inside(1) Diameter at End | Wall(2) Thickness | Centre-to- End Dimension A,B,C,M | Overall Length L | Overall Length E | Centre-to- Centre Dimension O | Back-to- Face Dimension K | Alignment at Ends U | Nominal Pipe SIze | Off Angle Q | Off Angle P |
1/2 TO 2-1/2 | +1/16 | ±1/32 | Not less than 87-1/2% of Normal Thickness | ±1/16 | ±1/16 | ±1/8 | ±1/4 | ±1/4 | ±1/32 | 12 to 4 | 1/32 | 1/16 |
-1/32 | 5 to 8 | 1/16 | 1/8 | |||||||||
3 TO 3-1/2 | ±1/16 | ±1/16 | ±1/16 | ±1/16 | ±1/8 | ±1/4 | ±1/4 | ±1/32 | 10 to 12 | 3/32 | 3/16 | |
4 | ±1/16 | ±1/16 | ±1/16 | ±1/16 | ±1/8 | ±1/4 | ±1/4 | ±1/32 | 14 to 16 | 3/32 | 1/4 | |
5 TO 8 | +1/32 | ±1/16 | ±1/16 | ±1/16 | ±1/4 | ±1/4 | ±1/4 | ±1/32 | 18 to 24 | 1/8 | 3/8 | |
-1/16 | ||||||||||||
10 TO 18 | +1/16 | ±1/8 | ±3/32 | ±3/32 | ±1/4 | ±3/8 | ±1/4 | ±1/16 | All dimensions are in inches | |||
-1/8 | ||||||||||||
20 TO 24 | +1/4 | ±3/32 | ±3/32 | ±3/32 | ±1/4 | ±3/8 | ±1/4 | ±1/16 | ||||
-3/32 |
Grade | C | Mn | Si | P | S | Cr | Cb | Ni | Fe |
SS 347 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 20.00 | 10xC – 1.10 | 9.00 – 13.00 | 62.74 min |
SS 347H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 8xC – 1.10 | 9.0 -13.0 | 63.72 min |
Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
We Serve Application Industry
Fastener applications are as diverse as the industries they serve driven primarily by the aerospace, railway, construction and automotive industries with petrochemical, nuclear, medical, Oil & Gas, Chemical, Pharmaceutical, Food & Beverage, Nuclear, Thermal Power plants, Paper and Pulp, marine and mining, etc.
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