About 347 Austenitic Stainless Steel
What is 347 Austenitic Stainless Steel?
347 is an austenitic stainless steel containing niobium. In terms of chemical composition, 347 can be seen as 304 stainless steel with the addition of niobium. It is also referred to as the UNS S34700 / W.Nr. 1.4550 stainless steel.
Grade 347 exhibits good corrosion resistance in acid, alkali and salt liquid. It has good oxidation resistance and weldability in air below 800°C. In comparison with 304 stainless steel, 347 stainless steel features excellent high temperature stress rupture and high temperature creep resistance performance.
347 Austenitic Stainless Steel Standards
ASTM A240
ASTM A276
ASTM A312
AMS 5521
347 Austenitic Stainless Steel Chemical Composition
| Grade | Standard | C | Si | Mn | P | S | Cr | Ni | Mo |
| 347 | ASTM A240 | ≤0.08 | ≤0.75 | ≤2.00 | ≤0.045 | ≤0.030 | 17.00-19.00 | 9.00-13.00 | – |
347 Austenitic Stainless Steel Data Sheet
347 Austenitic Stainless Steel Equivalent Grades
| STANDARD | WERKSTOFF NR. | UNS | GOST | AFNOR | JIS | BS | EN | OR |
| 347 | 1.4550 | S34700 | – | – | – | – | – | – |
347 Austenitic Stainless Steel Mechanical Properties
| Element | Yield Strength | Melting Point | Density | Tensile Strength | Elongation |
| 347 | ≥205Mpa | 1150 °C | 7.93 g/cm3 | ≥515Mpa | 40 % |
347 Austenitic Stainless Steel Applications
347 Austenitic Stainless Steel Related Resources
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