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K640S

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China GJB K640S 铸造高温合金和铸造金属间化合物高温材料母合金规范 第1部分普通精密铸件用铸造高温合金母合金 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: K640S / K640S
Category Grade Standard Region/Area Standard Content
Metals K640S GJB 5512.1 China 铸造高温合金和铸造金属间化合物高温材料母合金规范 第1部分普通精密铸件用铸造高温合金母合金

Chemical composition(mass fraction)(wt.%) of the K640S

Element Min Max Similar
C 0.4000 0.5500 -
Cr 24.5000 26.5000 -
Ni 9.5000 11.5000 -
Co - - -
W 7.0000 8.0000 -
Fe - 2.0000 -
B 0.0010 0.0080 -
Si 0.5000 1.0000 -
Mn 0.5000 1.0000 -
P - 0.0400 -
S - 0.0400 -

Mechanical Properties of steel grade K640S

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)
469 (≥) 613 (≥) 31 43 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 234

Physical Properties of steel grade K640S

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
34 - -     0.12 -  
455 418 - 12.3 323   -  
581 - 22 14.2   413 213

Heat Treatment of steel grade K640S

Heat treated : 1966°C - 1517°C

Technological Curves of steel grade K640S

Cross Reference Table (Equivalent Grade) of K640S

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.
Jiangyou Longhai Special Steel Co.,Ltd.

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