Alloy C-4 Data Sheet

GENERAL PROPERTIES

Alloy C-4 is a nickel-chromium-molybdenum alloy with outstanding high temperature stability. This alloy resists the formation of grain-boundary precipitates in the weld heat-affected zone, thus making it suitable for most chemical process applications in the as-welded condition. Alloy C-4 also has excellent resistance to stress-corrosion cracking and to oxidizing atmospheres up to 1038°C (1900°F).

RESISTANCE TO CORROSION

Alloy C-4 offers very high resistance to the different chemical processing conditions. These comprise of warm contaminated mineral acid, solvent, chlorine and chlorine mixed sources, arid chlorine, formic and acetic acid, acetic anhydride and seawater and brine mixtures and more.

The laboratory precipitation on alloy C-4 shows that the intermetallic precipitation with the other nickel alloys at the temperature ranges of 650 to 1093°C are not identified. The refined intergranular M6C carbide can be formed though with the minor destruction result. The accelerated analysis can be made to evaluate the resistance to corrosion offered by the Alloy C-4. An analysis is made in the rigorous conditions that are even more severe than the normal industrial conditions.

PHYSICAL PROPERTIES

MECHANICAL PROPERTIES

CHEMICAL PROPERTIES 

WELDING

Except submerged arc and oxy-acetylene welding methods, Alloy C-4 can be welded using all other welding methods.

HEAT TREATMENT

Alloy C-4 is heat treated by annealing at 1066°C (1950°F) followed by quenching.