Chinese
Available 24/7 at contact@steel-grades.com
SGSG
Post Your Request Now
Toggle menu
Hello, Sign inMy Account

K640M

Favorite Datasheet

China GJB K640M 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: K640M / K640M
Category Grade Standard Region/Area Standard Content
Metals K640M 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 K640M

Element Min Max Similar
C 0.4500 0.5500 -
Cr 24.5000 26.5000 -
Ni 9.5000 11.5000 -
Co - - -
W 7.0000 8.0000 -
Mo 0.1000 0.5000 -
Al 0.7000 1.2000 -
Ti 0.0500 0.3000 -
Fe - 2.0000 -
Ta 0.1000 0.5000 -
B 0.0080 0.0400 -
Zr 0.1000 0.3000 -
Si - 1.0000 -
Mn - 1.0000 -
P - 0.0400 -
S - 0.0400 -
Pb - 0.0005 -
Sb - 0.0010 -
As - 0.0010 -
Sn - 0.0010 -
Bi - 0.0000 -

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)
342 (≥) 575 (≥) 43 43 24 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
34 - -     0.23 -  
852 981 - 12.3 331   -  
755 - 22 21.2   241 344

Heat Treatment of steel grade K640M

Heat treated : 1758°C - 1848°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
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
  • Do you supply this K640M?
  • List your company on S&G now? Join
  • Non-paying users only
Sidebar RFQs Menu My Account
Top