Stainless Steel 347 Tube pipe is formed by drawing a solid billet over a piercing rod to create the hollow shell. As the manufacturing process does not include any welding, Stainless Steel 347 Tube Pipes are perceived to be stronger and more reliable. Historically, seamless pipe was regarded as withstanding pressure better than other types, and Stainless Steel 347 Tube was often more available than Welded Pipe.
Mechanical Properties Of Stainless Steel 347/347H Seamless Pipes and Tubes
| Grade | Tensile Strength ksi (MPa) min | Yield Strength 0.2% ksi offset ksi (MPa) min | Elongation (% in 50mm) min | Hardness (Brinell) MAX | Hardness (Rockwell B) MAX |
|---|---|---|---|---|---|
| 347/347H | 75 (515) | 30 (205) | 40 | 201 | 95 |
Stainless Steel 347 Tube is thus recommended for parts fabricated by welding which cannot be subsequently annealed or for parts which must operate in service between 800deg F – 1600deg F. SS Din 1.4550 Tube.
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