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Hastelloy

Overview

Hastelloy is the brand name of a range of specialised, high performance alloys manufactured by Haynes International. The primary component of Hastelloy is nickel, which is combined in varying degrees with other elements, such as chromium, molybdenum, iron, copper, manganese, cobalt, carbon, tungsten, aluminium and zirconium. There are currently 22 different types of Hastelloy.

Properties

All Hastelloy products perform well in corrosive environments, but are modified to excel in specialised applications. The following explains some of the unique properties of the most commonly used Hastelloys:

Hastelloy C-276 – A nickel-molybdenum-chromium alloy that performs well in most corrosive environments.

Hastelloy C-4 – Along with its anti-corrosion properties, Hastelloy C-4 is suited to high temperature applications.

Hastelloy B-3 – A nickel-molybdenum alloy that is highly effective in industrial applications involving the use of hydrochloric acid.

Hastelloy X – Made from nickel, chromium, iron and molybdenum, this alloy was developed for the petrochemical industries, combining oxidative resistance with good performance under high temperatures.

Hastelloy G – Excellent anti-corrosion properties against both oxidative and reducing media. This alloy is unique in that it is effective against both alkaline and acid corrosion.

Production

All forms of Hastelloy are manufactured using standard alloy production techniques, depending on the format in which it is required. Hastelloy has good formability and can be manufactured as foil, rod, strips, blocks, plates and piping.

Applications

As well as being ideal for corrosive environments, the Hastelloy super-alloys offer a business advantage, in that they are known for their superior cost to performance ratio and are used for:

  • Chemical applications
  • Nuclear reactors
  • Distillation equipment
  • Petrochemical industry
  • Paper production
  • Waste treatment plants

Interesting Fact

During the 60s, a low chromium, nickel-molybdenum alloy was used in an experimental molten-salt nuclear reactor. Known as Hastelloy-N, it was specially developed to be compatible with the fluoride salts used in the reactor.

Chemical Composition of Inconel 625

Element Content
Ni 55 %
Mo 15 – 17 %
Cr 14.5 – 16.5 %
Fe 4 – 7 %
W 3 – 4.5 %

Typical Properties of C-276

Properties Metric Imperial
Density 8.89 g/cm3 0.321 lb/in3
Melting point 1370 °C 2500 °F
Co-Efficient of Expansion 11.2 μm/m.°C
(20-100 °C)
6.2×10-6 in/in.°F
(70-212 °F)
Modulus of Rigidity 78.6 kN/mm2 11400 ksi
Modulus of Elasticity 205.5 kN/mm2 29806 ksi

 

Recent Ads in Hastelloy

Hast C 276

Material Grade: C276
Offcut Length: 650mm
Offcut width: 300mm
Thickness: 4.0mm
Cut Type: Flat
 

£150.00

Hastelloy C276

Material Grade: Hast alloy C276
Offcut Length: 150mm
Offcut width: 600mm
Thickness: 3.0mm
Cut Type: Flat