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GB GH1138 Details

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GH1138 Application:Iron-based superalloy

Category Type Grade Designations
Grades Superalloys GH1138 China - GB ,

Chemical composition(wt.%) of GH1138 grade:

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.10
Cr 18.0 22.0
Mo 2.0 2.6
Ni 35.0 40.0
W 4.5 5.2
Al - 0.5
Nb 1.0 1.7
B - 0.008
Fe - Remainder
Mn 1.0 2.0
Si - 0.8
Ce - 0.05
N 0.10 0.25
Zr - 0.05
GH1138

Mechanical properties of grade GH1138

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)
266 (≥) 253 (≥) 33 13 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 113

Physical properties of grade GH1138

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
675 (≥) 797 (≥) 33 24 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 424
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
257 289 452

GH1138 - Form of Supply

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
GH1138 GB China
Iron-based superalloy

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