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K640M

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K640 K6188
#K640M

Description

China GBT K640M conventional cast superalloy and K640M Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: K640M
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy K640M GBT China conventional cast superalloy
K202
K242
K536
K537
K648
K708
K605
K610
K612
K640

Chemical composition(mass fraction)(wt.%) of the K640M

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Mo(％) W(%) Co(%) B(%) Al(%) Ti(%) Ta(%) Fe(%)
0.45-0.55 ≤1.00 ≤1.00 0.040 0.040 24.50-26.50 9.50-11.50 0.10-0.50 7.00-8.00 Bal 0.008-0.040 0.70-1.20 0.05-0.30 0.10-0.50 ≤2.00

Mechanical Properties of steel grade K640M

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)
647 (≥) 699 (≥) 44 32 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 341

Physical Properties of steel grade K640M

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
11 - -     0.21 -  
273 169 - 34.3 211   -  
557 - 44 14.2   412 213

Heat Treatment of steel grade K640M

Heat treated : 1318°C - 1732°C

Technological Curves of steel grade K640M

Cross Reference Table (Equivalent Grade) of K640M

Grade Standard Country Application
K640M GBT China conventional cast superalloy
K640 K6188
Available Suppliers
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...

Rfq.: sales@longhaisteel.com
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