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K640

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K612 K640M
#K640

Description

China GBT K640 conventional cast superalloy and K640 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: K640
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy K640 GBT China conventional cast superalloy
K4169
K202
K242
K536
K537
K648
K708
K605
K610
K612

Chemical composition(mass fraction)(wt.%) of the K640

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) W(%) Co(%) Fe(%)
0.45-0.55 ≤1(00 ≤1.00 0.040 0.040 24.50-26.50 9.50-11.50 7.00-8.00 Bal ≤2.00

Mechanical Properties of steel grade K640

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV/Ku (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
542 (≥) 213 (≥) 13 32 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 432

Physical Properties of steel grade K640

Temperature
(°C)		 Modulus of elasticity
(GPa)		 Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)		 Specific thermal capacity
(J/kg·°C)		 Specific electrical resistivity
(Ω mm²/m)		 Density
(kg/dm³)		 Poisson’s coefficient, ν
32 - -     0.21 -  
292 656 - 24.3 132   -  
581 - 32 23.2   344 214

Heat Treatment of steel grade K640

Heat treated : 1535°C - 1772°C

Technological Curves of steel grade K640

Cross Reference Table (Equivalent Grade) of K640

Grade Standard Country Application
K640 GBT China Age hardening type Nickel base alloy
K640 GBT China conventional cast superalloy
K640M GBT China conventional cast superalloy
K612 K640M
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Jiangyou Longhai Special Steel Co.,Ltd.
Jiangyou Longhai Special Steel Co.,Ltd.

Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

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