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PRODUCT DESCRIPTION
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 heataffected-zone (HAZ) corrosion and improve weldability.
Inconel alloy G-3 has excellent corrosion resistance to oxidizing chemicals and atmospheres. Inconel alloy G-3 is also 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 is particularly suitable for handling reducing acids such as phosphoric and sulfuric. Inconel alloy G-3 is used in flue gas desulfurization systems (scrubbers), especially in quencher, damper, and outle ducting areas. It can be used in other air pollution control systems in the chemical and pulp and pape industries. It is a good candidate for evaporators, heatexchangers, tank liners, and other equipment i phosphoric acid manufacturing plants.
Today’s exploration for oil and gas leads to a range of highly corrosive environments that, in turn, require a range of corrosion-resistant high nickel content alloys. Inconel G-3 is one of these alloys, providing an excellent combination of mechanical properties and strength. Inconel alloy G-3 has been used extensively as OCTG (Oil Country Tubular Goods) in hot, sour environments.
Inconel alloy G-3 Chemical Composition
Inconel G-3 Physical Properties
Inconel G-3 Mechanical Properties
Inconel G-3 Thermal Properties
Inconel alloy G-3 Fabrication and Heat treatment
Inconel alloy G-3 can be readily fabricated using all the conventional methods.
Inconel alloy G-3 Welding
Weldability of Inconel G-3 is rated as good. It requires no post-weld heat treatment to re-attain corrosion resistance.
Inconel alloy G-3 Machinability
Inconel G-3 is machinable using carbide or high speed steel tools. It is recommended that the carbide tools should have high cutting speeds and feeds. In general the tools should have positive rake angles and should be operated with continuous cutting so as to avoid work-hardening of the material.
Inconel G-3 Applications
Inconel G-3 is chiefly used in the following application areas:
- Tank liners
- Evaporators
- Heat exchangers
- In air pollution control systems
- In damper, quencher, and outlet ducting areas
- In the chemical and pulp and paper industries
- In flue gas desulfurization systems such as scrubbers
- Components in phosphoric acid manufacturing plants.
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