GH4738 Nickel base superalloy GH738

GH4738 Nickel base superalloy GH738

 

GH4738 (GH738) nickel-based superalloy overview

GH4738 is a nickel-based high-temperature alloy hardened by γ ′ precipitation, with good gas corrosion resistance, high yield strength and fatigue performance, good process plasticity and stable organization. It is widely used in rotating parts of aero engines, and its operating temperature is not higher than 815 ℃. Can produce cold-rolled and hot-rolled sheet, pipe, strip, wire and forgings, castings, fasteners.

 

GH4738 (GH738) nickel-based superalloy chemical composition

C	Cr	Ni	Ti	Mo	Al	Zr	Fe
0.03 0.10	18.00  21.00	margin	2.75 3.25	3.50 5.00	1.20 1.60	0.02 0.08	≤ 2.00
B	Cu	Co	Mn	Si	P	S
0.003 0.010	≤ 0.10	12.00 15.00	≤ 0.10	≤ 0.15	≤ 0.020	≤ 0.015

 

GH4738 (GH738) nickel-based superalloy similar grades

GH4738 GH738 (China), Waspaloy (USA), NC20K14 (France)

 

GH4738 (GH738) nickel-based superalloy heat treatment system

1080 ℃ ± 10 ℃, 4h, air cooling + 840 ℃, 24h, air cooling + 760 ℃, 16h, air cooling.

 

GH4738 (GH738) nickel-based superalloy variety specifications and supply status

It can produce bars, profiles, forging blanks, ring parts, thick plates, thin plates, strips, pipes, wires, sand castings, precision castings and fasteners, etc., usually delivered without heat treatment, and the plates are delivered after solution treatment goods.

 

GH4738 (GH738) nickel-based superalloy melting and casting process

Adopt vacuum induction melting and vacuum arc remelting process.

 

GH4738 (GH738) nickel-based superalloy application profile and special requirements

The alloy is widely used abroad in aero engines and gas turbines, mainly used as rotating parts such as turbine blades and turbine disks, and has mature experience in use. Because the alloy contains high cobalt, it is rarely used in China.