DIN 1.4876 / Alloy 800 / 800H Nickel Alloy Seamless Pipe Tubing ASTM EN DIN Standard

Incoloy800 Alloy 800 is widely used in equipment that must have high strength and resistance to oxidation, carburisation and other harmful effects of high temperature exposure. For service requiring optimum creep and rupture properties, Incoloy 800H or 800 HT are used. The high contents of nickel and chromium in the alloys also give good corrosion resistance.

Chemical Composition

ASTM B407 – Seamless Pipe & Tube

Specified Minimum Mechanical Properties

Incoloy 800 is a solid solution strengthened alloy of nickel, chromium and iron with small additions of aluminium and titanium. Incoloy 800H and Incoloy 800HT are developments of Incoloy 800, which give better performance at high temperature. ASME design codes give significantly higher design strengths for Incoloy H and HT than Incoloy 800, and allow their use to higher temperatures. AS1210 prequalifies Incoloy 800 for use to 800°C. ASME specifications allow the use of Incoloy 800 to 815°C, and of Incoloy 800H and 800HT to 982°C.

Typical Applications

Thermal processing equipment in industrial applications, such as baskets, trays, and fixtures. In chemical or petrochemical processing it is used for heat exchangers and piping systems in nitric acid media, especially where resistance to chloride stress corrosion cracking is required.

Description

Incoloy 800/800H/800HT are solid solution nickel chromium iron alloys with small additions of aluminium and titanium to improve corrosion and oxidation resistance. They are used for high temperature service, where resistance to oxidation and carburisation are required. For optimum stress rupture properties, or for pressure vessel service above 815°C, Incoloy 800H or Incoloy 800HT should be used.

Availability

Austral Wright Metals can supply these alloys as plate, sheet and strip, rod and bar, seamless and welded tube and pipe, fittings, condenser & heat exchanger tube, forgings and forging stock.

ASTM Product Specifications

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