Alloy 347 & 347H Stainless Steel Pipe Fittings
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Gnee Super Alloy (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of alloy 347 & 347h stainless steel pipe fittings in China. If you're going to wholesale high quality alloy 347 & 347h stainless steel pipe fittings made in China, welcome to get free sample from our factory. Good service and reasonable price are available.
Alloy 347 stainless steel are austenitic stainless steels that contain stabilizing elements. This alloys is easily welded. Annealing may not be required after welding unless stress relief is desired. 347 stainless steel has excellent resistance to oxidation and corrosion. With high creep strength, 347 stainless steel work best up to 1600 °F. The addition columbium plus tantalum in 347 stainless steel give some desired characteristics like:
Prevents harmful carbide precipitation in the heat affected zone (HAZ) of the weld area
Imparts substantial immunity to intergranular corrosion
Reduced embrittlement in the HAZ of the weld area
| Property | Alloy 347 Stainless Steel | Alloy 347H Stainless Steel |
|---|---|---|
| Chemical Composition | C: 0.08 max<br> Mn: 2.0 max<br> Si: 1.0 max<br> P: 0.045 max<br> S: 0.030 max<br> Cr: 17.00 - 20.00<br> Ni: 9.00 - 13.00 | C: 0.04 - 0.10<br> Mn: 2.0 max<br> Si: 1.0 max<br> P: 0.045 max<br> S: 0.030 max<br> Cr: 17.00 - 20.00<br> Ni: 9.00 - 13.00 |
| ASTM Standards | A240, A480, AMS 5512 | A240, A480, AMS 5512 |
| Density | 7.96 g/cm³ | 7.96 g/cm³ |
| Tensile Strength | 75 ksi (min) | 75 ksi (min) |
| Yield Strength | 30 ksi (min) | 30 ksi (min) |
| Elongation | 40% (min) | 40% (min) |
| Hardness | 201 HB (max) | 201 HB (max) |
| Melting Point | 1398 - 1446°C | 1398 - 1446°C |
347 and 347H stainless steel is common in the petroleum refining industries. Alloy 347 and 347H stainless steel is used to make radiant superheaters, boiler tubes, high pressure steam pipe, and general refinery piping. They are also used for heavy-duty exhaust systems and manifolds.
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