GH5188 is also known as UNSR30188, W.N.2.4683,Hayness 188
GH5188 is solid solution strengthened cobalt base superalloy. Add 14% tungsten for solid solution strengthened and make the alloy have excellent high temperature thermal strength. Add high content chromium and trace lanthanum and make the alloy have good oxidation resistance at high temperature and satisfactory forming, welding and etc technological properties. It is suitable for the manufacture of aeroengine parts requiring high strength below 980℃ and oxidation resistance below 1100℃. The alloy is widely used abroad in the manufacture of high-temperature components of gas and missiles, such as combustor, tail nozzle and heat exchanger parts in the nuclear energy industry. The high temperature components that aero-engine combustion chamber flame cylinder and guide vane made of this alloy have passed long-term test and been put into production in China.

Process Performance and Requirements

• Product Fusion Process

Vacuum Induction Furnace(VIM) and Electroslag Remelting Furnace(ESR)

• Product Chemical Composition

• Product Physical Property

• Corrosion Resistance

The alloy can be circulating test at 900℃ ↔260℃ for 200h dynamic thermal corrosion test,corroded by gas in the combustion device. The alloy corrosion resistance is better than GH3536 alloy in polluted environment containing Na2SO2 and NaCl

• Heat Treatment Institution

a) Forged bar and ring,1180℃±10℃,Choose the cooling rate to ensure the product mechanical properties ,HB≤293
b) Cold-rolled Plate and Strip,1165℃-1230℃,Rapid cooling, holding time according to the product section thickness
c) Hot-rolled Plate,1170℃-1190℃,cooling,HV≤282

• Product Mechanical Property

• Productive Process

• Professional Customization