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INCONEL alloy G-3 (UNS N06985/W. Nr. 2.4619) is a nickel-chromium-iron alloy with additions of molybdenum and copper. Some of the minor elements are controlled to yield increased resistance to heat-affected-zone (HAZ) corrosion and improved weldability. Alloy G-3 has excellent corrosion resistance to oxidizing chemicals and atmospheres. It isalso resistant to reducing chemicals because of its nickel and copper contents. Nickel also provides the alloy with exceptional stress-corrosion-cracking resistance in chloride containing environments. The high molybdenum provides very good resistance to pitting and crevice corrosion. The low carbon helps prevent sensitization, giving the alloy resistance to intergranular corrosion
INCONEL alloy G-3 UNS N06985/W. Nr. 2.4619 CHEMICAL COMPOSITION
| ELEMENT % | |||||||||||||
| GRADE | Ni | Cr | Fe | Mo | Cu |
Nb+Ta max |
C max |
W max |
Si max |
Mn max |
P max |
S max |
Co max |
| alloy G-3 | Balance | 21.0-23.5 | 18.0-21.0 | 6.0-8.0 | 1.5-2.5 | 0.50 | 0.015 | 1.5 | 1.0 | 1.0 | 0.04 | 0.03 | 5.0 |
INCONEL alloy G-3 UNS N06985/W. Nr. 2.4619 PHYSICAL PROPERTIES
| GRADE | Density | Melting Range | ||
| g/cm3 | lb/in3 | °C | °F | |
| alloy G-3 | 8.14 | 0.294 | 1260-1343 | 2300-2450 |
INCONEL alloy G-3 UNS N06985/W. Nr. 2.4619 HEAT TREATMENT REQUIREMENTS
| GRADE | The alloy may be annealed, but does not respond to age-hardening. It is normally furnished in the annealed condition. It is important to anneal after hot or cold working in order to restore optimum corrosion resistance. | ||||||||||||
| alloy G-3 | |||||||||||||
INCONEL alloy G-3 UNS N06985/W. Nr. 2.4619 MECHANICAL PROPERTIES
| GRADE |
Form and Condition room-temperature |
Tensile Strength min |
Yield Strength (0.2% Offset), min |
Elongation min, % | Reduction of Area, min,% | Brinell Hardness | Approximate Rockwell Hardness, B and C | ||||
| ksi | MPa | ksi | MPa | min | max | ||||||
| alloy G-3 |
Sheet & Plate (Annealed) |
90 | 621 | 35 | 241 | 45 | - | - | - | - | |
|
OCTG (Cold worked) |
130 | 896 | 125 | 862 | 13 | - | - | - | - | ||
INCONEL alloy G-3 UNS N06985/W. Nr. 2.4619 Spec. No.
| Rod and bar | ASTM B 581, ASME SB-581, DIN 17752 | ||||||||||||
| Plate, Sheet and Strip | ASTM B 582, ASME SB-582, DIN 17750, ISO 6208 | ||||||||||||
| Welded pipe | ASTM B 619, ASME SB-619, ASTM B 775, ASME SB 775 | ||||||||||||
| Seamless pipe and tube | ASTM B 622, ASME SB-622, ASTM B 829, ASME SB 829, DIN 17751 | ||||||||||||
| Welded tube | ASTM B 626, ASME SB-626, ASTM B 751, ASME SB 751 | ||||||||||||
| Others | DIN 17744, ISO 9724, ASTM B 366, ASME SB 366 | ||||||||||||
INCONEL alloy G-3 UNS N06985/W. Nr. 2.4619 APPLICATIONS
INCONEL alloy G-3 UNS N06985/W. Nr. 2.4619 APPLICATIONS
INCONEL alloy G-3 is particularly suitable for handling reducing acids such as phosphoric and sulfuric. It is used in flue gas desulfurization systems(scrubbers), especially in quencher, damper, and outlet ducting areas. It can be used in other air pollution control systems in the chemical and pulp and paper industries. It is a good candidate for evaporators, heat exchangers, tank liners, and other equipment in phosphoric acid manufacturing plants.
