Alloy 347 exhibits excellent resistance to intergranular corrosion.
Alloy 347 from NeoNickel offers superior resistance to intergranular corrosion. It’s also suitable for high temperature service, due to its good mechanical properties. Alloy 347 is now available from NeoNickel.
| % | Cr | Ni | Cb+Ta | C | Si | Mn | P | S | Fe |
|---|---|---|---|---|---|---|---|---|---|
| Min | 17 | 9 | Cb10xc | 0.04 | - | - | - | - | - |
| Max | 19 | 13 | 1 | 0.08 | 0.75 | 2 | 0.045 | 0.03 | Balance |
Alloy 347 is generally used where corrosive conditions are severe, such as aircraft exhaust stacks, manifolds and ring collectors. Type 347 is also used for heavy welded assemblies which cannot be annealed after welding or where the operating conditions cause exposure within the temperature range between 426.67 °C to 815.55 °C.
| Mechanical & Physical Properties | 21.1°C | 100°C | 500°C |
|---|---|---|---|
| Coefficient of Thermal Expansion, µm/m⁰C | 16.6 | ||
| Thermal Conductivity/ kcal/(hr.m.°C) | 167.4 | 219.8 | |
| Modulus of Elasticity Dynamic/ x105 MPa | 1.93 |
| 75 | Tensile strength, ksi |
|---|---|
| 30 | 0.2% Yield Strength, ksi |
| 40 | Elongation, % |
| 201 | Hardness Max, Brinell |
| Temperature, °C | 20°C | 204.44°C | 426.66°C | 537.77°C | 648.88°C | 732.22°C | 815.55°C |
|---|---|---|---|---|---|---|---|
| Ultimate Tensile Strength, ksi | 93.3 | 73.6 | 69.5 | 63.5 | 52.3 | 39.3 | 26.4 |
| 0.2% Yield Strength, ksi | 36.5 | 36.6 | 29.7 | 27.4 | 24.5 | 22.8 | 18.6 |
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