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K640M

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China GB K640M 高温合金和金属间化合物高温材料的分类和牌号 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: K640M / K640M
Category Grade Standard Region/Area Standard Content
Metals K640M GB/T 14992 China 高温合金和金属间化合物高温材料的分类和牌号

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

Element Min Max Similar
Zr 0.1000 0.3000 -
W 7.0000 8.0000 -
Ti 0.0500 0.3000 -
Ta 0.1000 0.5000 -
Si - 1.0000 -
S - 0.0400 -
P - 0.0400 -
Ni 9.5000 11.5000 -
Mo 0.1000 0.5000 -
Mn - 1.0000 -
Fe - 2.0000 -
Cr 24.5000 26.5000 -
Co - - -
C 0.4500 0.5500 -
B 0.0080 0.0400 -
Al 0.7000 1.2000 -

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)
637 (≥) 585 (≥) 43 34 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 441

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
31 - -     0.32 -  
116 238 - 33.3 331   -  
123 - 13 33.2   312 222

Heat Treatment of steel grade K640M

Heat treated : 1216°C - 1893°C

Technological Curves of steel grade K640M

Cross Reference Table (Equivalent Grade) of K640M

Grade Standard Country Application
ASTM 5140
AISI 201
AISI 202
1.2767
17-4PH
AISI 1052
AISI 416Se
AISI 1330
AISI 205 Stainless Steel
AISI A10
AISI A2
AISI A3
AISI A4
1.0036
1.0037
SAE J403
UNS G10100
AMS 4924
ASTM A36
Electrode 100S-1
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Jiangyou Longhai Special Steel Co.,Ltd.

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