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Hastelloy C-4

Hastelloy C-4 is a nickel-chromium-iron-molybdenum superalloy with outstanding high temperature strength, oxidation resistance, and fabricability. Alloy C-4’s oxidation resistance is excellent up to 2200° F.

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  • Hastelloy C-4
  • RONSCO
  • Alloy1996HC4

HASTELLOY C-4


Hastelloy C-4 is a nickel-chromium-iron-molybdenum superalloy with outstanding high temperature strength, oxidation resistance, and fabricability. This nickel steel alloy has also been found to be exceptionally resistant to stress-corrosion cracking in petrochemical applications. Matrix stiffening provided by the molybdenum content results in high strength in a solid-solution alloy having good fabrication characteristics. Although this nickel alloy is primarily noted for heat and oxidation resistance it also has good resistance to chloride stress-corrosion cracking, carburization, and excellent resistance to reducing or carburizing atmospheres. Two common conditions that often lead to early failure in high temperature alloys, carburization and nitriding, Hastelloy X resists.


In what forms is Hastelloy C-4 ?

  • Sheet

  • Plate

  • Bar


What are the characteristics of Hastelloy C-4?

  • Outstanding oxidation resistance through 2000° F

  • Resistant to carburization and nitriding

  •  Excellent high temperature strength

  • Good resistance to chloride stress-corrosion cracking


Chemical Composition(%)

NiMoCrFeWCoMnC
Remainder8.0-10.020.5-23.017.0-20.0.2-1.0.5-2.51.0 max.05-.15
PSSiAlTiBCu
.04 max.03 max1.0 max.50 max.15 max.01 max.50 max

In what applications is Hastelloy C-4 used?

  • Gas turbines

  • Petrochemical industry

  • Industrial furnaces

  • Heat treating equipment

  • Nuclear engineering

  • Jet engine combustion chambers

  • Aircraft cabin heaters

  • · Turbine exhaust components


Alloy X is one of the most widely used nickel base superalloys for gas turbine engine combustion zone components such as transition ducts, combustor cans, spray bars and flame holders as well as in afterburners, tailpipes and cabin heaters. It is recommended for use in industrial furnace applications because it has unusual resistance to oxidizing, reducing and neutral atmospheres. Hastelloy X is also used in the chemical process industry for retorts, muffles, catalysts support grids, furnace baffles, tubing for pyrolysis operations and flash drier components.


Fabrication with Hastelloy c-4

Alloy X has excellent forming and welding characteristics. It can be forged and, because of its good ductility, can be cold worked. It can be welded by both manual and automatic methods including shielded metal arc, gas tungsten arc, gas metal arc and submerged arc processes. The alloy can also be resistance welded. For hot forming, the alloy should be heated to a starting temperature of 2150° F (1175°C).


ASTM Specifications

Sheet/PlateBar
B435B572


Mechanical Properties

Representative Tensile Properties, sheet

Temp° FTensile (psi).2% Yield (psi)Elongation in 2&rd %
70110,60054,90044
100089,00035,60049
120083,00035,40054
140067,00034,40053
160045,00028,20058

 
 

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