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GH4738 Application:Nickel base superalloy
Category Type Steel grade Standard Country
Grades Special Alloy GH4738 GBT China

Chemical composition % of the ladle analysis of grade GH4738

C(％) Cr(％) Ni(％) Mo(％) Co(%) B(%) Al(%) Ti(%) Other(%)
0.03-0.10 18.0-21.0 Balance 3.5-5.0 12.0-15.0 0.003-0.0 1.2-1.6 2.75-3.25 Zr :0.02-0.08
GH4738
Mechanical properties of grade GH4738
Proof strength
Rp0.2 (MPa)		 Tensile strength
Rm (MPa)		 Impact energy
KV (J)		 Elongation at fracture
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
688 (≥) 977 (≥) 22 22 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 341
Physical properties of grade GH4738
Property Density
kg/dm3		 Temperature T
°C/F		 Specific heat
J / kgK		 Thermal conductivity
W/mK		 Electric resistance
µΩ·cm		 Modulus of elasticity
kN/mm2		 Expansion rate
645 (≥) 324 (≥) 14 44 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 431
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
383 845 448
GH4738 Range of products
Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED
Cross Reference Table(Equivalent Grade)
Grade Standard Country Application
GH4738 GBT China
Nickel-base superalloy

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