K640

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China HB K640 航空发动机用等轴晶铸造高温合金锭规范 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: K640 / K640

Category	Grade	Standard	Region/Area	Standard Content
Metals	K640	HB 7763	China	航空发动机用等轴晶铸造高温合金锭规范

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

Element	Min	Max	Similar
S	-	0.0400	-
P	-	0.0400	-
Si	0.5000	1.0000	-
Mn	0.5000	1.0000	-
B	0.0010	0.0080	-
Fe	-	2.0000	-
W	7.0000	8.0000	-
Co	-	-	-
Ni	9.5000	11.5000	-
Cr	24.5000	26.5000	-
C	0.4500	0.5500	-

Mechanical Properties of steel grade K640

Yield R_p0.2 (MPa)	Tensile R_m (MPa)	Impact KV/Ku (J)	Elongation A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	Brinell hardness (HBW)
726 (≥)	613 (≥)	34	44	22	Solution and Aging, Annealing, Ausaging, Q+T,etc	111

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
21	-	-			0.24	-
444	525	-	24.3	313		-
845	-	14	44.2			223	111

Heat Treatment of steel grade K640

Heat treated : 1115°C - 1481°C

Technological Curves of steel grade K640

No Curve

Cross Reference Table (Equivalent Grade) of K640

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

Available Suppliers

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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