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Quality of Microstructure of Duplex Stainless Steels
Duplex stainless steels typically have 50% of both austenite and ferrite in their microstructure. It is necessary to have good
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Flat Bar or Gauered Flat Bar from Plate
Discover the difference between flat bars and gauered flat bars cut from plates. Learn about their dimensional tolerances and the
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Metal Dusting
Metal Dusting is a hazard when using heat-treat carburizing furnaces and petrochemical equipment. Explore how high-chromium alloys thwart this destructive
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Manganese Substitution Grades of Stainless Steel
Explore the evolution of stainless steel with manganese substitution grades, offering cost-effective solutions for industries like appliances and food equipment.
800H/AT
800H/AT (Incoloy® 800) is an austenitic heat resistant alloy designed for high temperature structural applications. The strength of 800H/AT is achieved by controlled levels of carbon, aluminum and titanium along with a 2100°F minimum anneal to achieve a grain size of ASTM 5 or coarser.
800H/AT is commonly welded using RA82 (ERNiCr-3) bare wire for applications under 1450°F. RA330-04 (N08334) bare wire offers a closer match of thermal expansion coefficient, and somewhat higher strength. For maximum strength alloy 617 (ERNiCrCoMo-1) bare wire or 117 (ENiCrCoMo-1) covered electrodes are suggested. To avoid possible stress relaxation grain boundary cracking of N08811 in applications above 1000°F the welded fabrication may be heated 1650°F for about one hour per inch of thickness or 30 minutes minimum then air cooled.
- High design stresses for ASME Section VIII applications to 1650°F
- Useful oxidation resistance through 1800°F
- Resistant to chloride ion stress corrosion cracking
UNS: N08810, N08811
W. NR.: 1.4958, 1.4959
ASTM: B 407, B 408, B 409
ASME: SB 407 CODE CASE 1325, SB 408, SB 409
- Nitric acid catalyst supports
- Reformer outlet pigtails and manifolds
- Heat exchangers
- Pressure vessels
- Dampers
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