Hastelloy G-3 (UNS N06985 / W.Nr. 2.4619)
Hastelloy G-3 (UNS N06985 / W.Nr. 2.4619) is a nickel-chromium-iron alloy with additions of molybdenum and copper. It has good weldability and resistance to intergranular corrosion in the welded condition. The low carbon content helps prevent sensitization and consequent intergranular corrosion of weld heat-affected zones. Used for flue-gas scrubbers and for handling phosphoric and sulfuric acids.
Equivalent Grades
| Trademark | GB | GOST | ASTM | UNS | DIN | W.Nr. | NF | BS | JIS | SS |
Hastelloy G-3
Nicrofer 4023hMo | NS3404 | – | Hastelloy G-3 | N06985 | – | 2.4619 | – | – | – | – |
Chemical Composition, %
| Alloy | C | Si | Mn | P | S | Cr | Ni | Co | Mo | W | Nb+Ta | Cu | Fe |
| Hastelloy G-3 | ≤0.015 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 21.0-23.5 | Bal | ≤5.00 | 6.0-8.0 | ≤1.50 | ≤0.50 | 1.5-2.5 | 18.0-21.0 |
Typical Physical and Mechanical Properties (RT, Solution annealed)
| Density, g/cm3 | Melting Point, ℃ | Tensile Strength, MPa | Yield Strength, MPa | ELongation, % | Hardness, HB |
| 8.14 | 1260-1343 | 690 | 321 | 50 | – |
Available Products and Specifications
| Rod, Bar, Wire and Forgings | ASTM B581, ASME SB581, DIN 17752 |
| Plate, Sheet and Strip | ASTM B582, ASME SB582, DIN 17750, ISO 6208 |
| Pipe and Tube | ASTM B619, ASTM B622, ASTM B626, ASTM B751, ASTM B775, ASTM B829, ASME SB619, ASME SB622, ASME SB626, ASME SB751, ASME SB775, ASME SB829 |
| Welding Product | – |
| Others | ASTM B366, ASME SB366 |
Features
- Good corrosion resistance
- Well weldable and with good stability against grain border corrosion in welded condition
Applications
- Process equipment for flue gas scrubbers
- Sulfate compounds
- Mixed acids
