Incoloy 800

incoloy 800 is an alloy containing typically 15-25% Cr, 30-45% Ni, and small amounts of aluminum and titanium.

Brief Description

Alloy 800 typically contains 15-25% Cr, 30-45% nickel, and small amounts of aluminum and titanium. 　

Alloy 800 is in the austenitic monoclinic zone from the high temperature fast cooling, therefore, the use state is a single austenitic organization. 　

The alloy has high chromium content and enough nickel content, so it has high high temperature corrosion resistance, and is used more in industry. 　

In chloride, low concentration of NaOH aqueous solution and high temperature and high pressure water, has excellent resistance to stress corrosion rupture performance, so used in the manufacture of stress corrosion rupture resistance equipment

Incoloy800 similar grades　

China: 0Cr20Ni32AlTi 　

USA: No8800 　

Japan: NCF800 　

West Germany: X2NiCrAlTi3220 　

Application areas of Incoloy800　

Chemical industry 　

Nuclear generator 　

Nitric acid cooler

Acetic anhydride cracking tube

Heat exchange equipment

Specification

Plate, strip, pipe, forging negotiated supply 　

Incoloy800 Standard　

ASTM B409....... Stainless steel hot rolled steel plate 　

ASTM B514...... stainless steel cold rolled steel plate 　

ASTM B515...Stainless/Acid Resistant Steel Cold Rolled Strip 　

Status of supply of Incoloy800　

Hot or cold rolled, heat treated, in oxidized state or pickled 　

Incoloy800 corrosion resistance　

Corrosion resistance is superior to general austenitic stainless steels and to Incolo 600 alloy; in the manufacture of corrosion-resistant stress rupture equipment, it is in turn superior to Incolo 600 and Monel 400 alloys. 　

Physical Properties

Melting temperature range: 1350～1400℃. 　

Specific heat capacity: 455J/(kg-°C) 　

Density: 8.0 g/cm3 　

Magnetism: None 　

Incoloy800 Processing　

Thermal processing　

1、Temperature range 1200℃～950℃, cooling method is water quenching or rapid air cooling. 　

2、In order to get the best performance and creep resistance, solid solution treatment should be carried out after hot working. 　

3, the material can be sent directly into the furnace has been warmed up to 1200 ℃, insulation for a sufficient period of time and then quickly out of the specified temperature range for hot working. When the material temperature drops below the hot working temperature, reheating is required. 　

Cold working　

1, the work hardening rate is greater than austenitic stainless steel, so the processing equipment needs to be selected. Cold working material should be solid solution heat treatment state, and should be intermediate annealing when the cold working quantity is larger. 　

2, if the amount of cold working is greater than 10%, the need for secondary solution treatment of the workpiece. 　

Incoloy800 welding process　

Suitable for any traditional welding process with the same material or other metal welding, such as tungsten electrode inert gas shielded welding, plasma arc welding, manual subarc welding, metal pole inert gas shielded welding, fusion electrode inert gas shielded welding, which pulse arc welding is the preferred option. If manual arc welding is used, (Ar+He+H2+CO2) is recommended as the shielding gas.