Inconel 800/800H Round Bars Equivalent Grade

Inconel 800/800H Round Bars Chemical Composition

Inconel 800/800H Round Bars Mechanical Properties

Properties of Incoloy 800 alloy

Incoloy 800 Cold Forming
Cold forming of Incoloy 800 is done by procedures similar to those used for Inconel Alloy 600 and Stainless Steel. The work-hardening rate for Inconel 800, is higher than the rate for mild steel but lower than that for Type 304 stainless steel. The work-hardening rate for Incoloy 800 is essentially the same as the rate for Inconel 600.

Incoloy 800 Hot Forming
Hot forming of Incoloy 800 is done in the temperature range of 1600 to 2200°F (870 to 1200°C). Heavy forging should be done at temperatures from 1850°F to 2200°F (1010°C to 1200°C). Forming at temperatures between 1200 and 1600°F (650-870°C) can result in cracking of the workpiece.

The rate of cooling following hot forming is not critical with respect to thermal cracking. However, the alloy is subject to carbide precipitation in the 1000-1400°F (540- 760°C) temperature range and should be cooled rapidly through that range to avoid sensitization.

Incoloy 800 Machining
Incoloy 800 is readily machined by standard methods. Turning operations can be performed with high metal removal rates, good tool life, and good surface finish using coated carbide tools. Good results have also been obtained with high-speed-steel tools, which are better for interrupted cutting.

Coated carbide tools have shown good life at cutting speeds of 110-190 sfpm (33.5-57.9 m/min) and a feed of 0.008-0.035 ipr (0.20-0.89 mm/rev.). High speed steel tools have been shown to have good life at cutting speeds of 35- 95 sfpm (10.7-29.0 m/min) and a feed of 0.008-0.035 ipr (0.20-0.89 mm/rev.).

Incoloy 800 Welding
Incoloy 800 has good weldability by all welding processes. Material to be welded must be thoroughly clean, and the proper joint designs must be used. For shielded metal-arc welding of Alloy 800, the recommended welding product is Inco-Weld a Electrode.

For gas-tungsten-arc, gas-metal-arc, and submerged-arc welding, Inconel Filler Metal 82 is recommended. Incoflux 4 Submerged Arc Flux is used with the submerged-arc process. These products may be used for most dis-similiar welding requirements with Incoloy 800 as well.

Incoloy 800 Heat Treatment
All material to be heated must be clean. Oil, paint, grease, shop soil and other foreign substances must be removed prior to the heating operation. Heating must be performed in a low-sulfur atmosphere. Open heating must be done with low-sulfur fuel, and the furnace atmosphere must be maintained in a reducing condition to prevent excessive oxidation.

Because of the readiness with which chromium is oxidized into a refractory oxide by air, carbon dioxide or water vapor, alloy 800 cannot be bright annealed in the usual industrial annealing furnace. Under closely controlled conditions, the alloy can be bright annealed in dry, pure hydrogen (dew point of -73°F (-58°C) or lower, less than 0.004% by volume water, and less than 0.007% by volume air).