B 637 N07718 Superalloys to B 637 (2012)

B 637 N07718 - Specification & Application

  • B 637 (2012) - Precipitation-Hardening and Cold Worked Nickel Alloy Bars, Forgings, and Forging Stock for Moderate or High Temperature Service

Precipitation-Hardening and Cold Worked Nickel Alloy Bars, Forgings, and Forging Stock for Moderate or High Temperature Service

Chemical composition(wt.%) of B 637 N07718 grade: to B 637 (2012)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.03
Cr 17.0 21.0
Mo 2.80 3.30
Ni 50.0 55.0
Al 0.20 0.60
Nb 4.75 5.50
Fe - Bal
Si - 0.35
Mn - 0.35
P - 0.015
S - 0.015
B - 0.006

B 637 N07718 - Detail

B 637 N07718

Mechanical properties of grade B 637 N07718 B 637 (2012)

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)
834 (≥) 441 (≥) 23 44 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 113

Physical properties of grade B 637 N07718 B 637 (2012)

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
456 (≥) 112 (≥) 24 23 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 214
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
552 977 256
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