ASTM B407 Alloy 800, 800H, 800HT, Nickel Alloy Tube, Boiler, Heat Exchanger, Tube bundle Application

ASTM B407 Alloy 800, 800H, 800HT, Nickel Alloy Tube, Boiler, Heat Exchanger, Tube bundle Application
 
Yuhong Group has more than 34 years supply boiler tube , heat exchanger tube , Condenser Tube , Cooling Tube, Material cover : Stainless Steel , Duplex Steel , Super Duplex Steel , Nickel base alloy Steel (Hastelloy, Monel , Inconel , Incoloy), Copper Alloy , Cr-Mo alloy Steel , our boiler tube and heat exchanger tube already export more than 65 countries, and give our best service for more than 1000 clients. Yuhong Brand already stand: High Quality , High Efficiency , and Excellent quality !
 

 
Incoloy alloy 825 is a nickel-iron-chromium alloy with additions of copper, molybdenum and titanium. The alloy's chemical composition is designed to provide exceptional resistance to many corrosive environments. The nickel content is sufficient for resistance to chloride-ion stress corrosion cracking. The nickel, in conjunction with the molybdenum and copper, also gives outstanding resistance to reducing environments such as those containing sulfuric and phosphoric acids. The molybdenum also aids resistance to pitting and crevice corrosion. The alloy's chromium content confers resistance to a variety of oxidizing substances such as nitrates, nitric acid and oxidizing salts. The titanium addition serves, with an appropriate heat treatment, to stabilize the alloy against sensitization to intergranular corrosion. The resistance of Incoloy 825 to general and localized corrosion under diverse conditions gives the alloy broad usefulness. Applications include chemical processing, pollution control, oil and gas recovery, acid production, pickling operations, nuclear fuel reprocessing and handling of radioactive wastes.
.The outstanding property of Incoloy 825 is its corrosion resistance. In reducing & oxidising conditions, Incoloy 825 resists general corrosion, pitting & crevice corrosion, intergranular corrosion and stress corrosion cracking. It is particularly useful in sulphuric & phosphoric acids, sulphur containing flue gases, sour gas and oil wells and sea water.
Incoloy 825 is approved for pressure vessel operating temperatures up to 525C (AS1210, AS4041), 538C (ASME Boiler & Pressure Vessel Code, Sections I, III, VIII, IX, Cases 1936, N-188). Brittle phases may form in alloy 825 at temperatures above ~ 540C, so it is not normally used at these temperatures, where creep-rupture properties would be design factors.

Chemical Composition of Incoloy Alloy 825
Table 1. Chemical composition of Incoloy Alloy 825 (ASTM B163  Heat exchanger tube)
 

 
Tensile Properties of Incoloy Alloy 825
Table 2. Typical room temperature tensile properties (not for design. Consult the relevant material or product specification for design values)
 

 
Corrosion Resistance
The outstanding property of Incoloy 825 is its corrosion resistance. In reducing & oxidising conditions, Incoloy 825 resists general corrosion, pitting & crevice corrosion, intergranular corrosion and stress corrosion cracking. It is particularly useful in sulphuric & phosphoric acids, sulphur containing flue gases, sour gas and oil wells and sea water.
Incoloy 825 can be readily hot or cold worked. Hot working should be in the range 870  1180C, finishing at 870  980C. For maximum corrosion resistance hot worked parts should be stabilise annealed before use. The alloy is easier to cold form than stainless steels.

Heat Treatment
Incoloy 825 is stabilise annealed at 940C. The softest structure is obtained at 980C. Sections heavier than sheet, strip and wire should be quenched to avoid sensitisation.

Application
Incoloy 825 is the material of choice in a wide variety of applications up to a temperature of approximately 550C (1020F),

• Chemical Processing
• Nuclear Fuel Reprocessing
• Acid Production
• Pickling Equipment