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G639.90

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G645.90 S1
#G639 #90

Description

Czech Republic CSN G639.90 The Czech republic Structural steel and G639.90 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: G639.90
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel G639.90 CSN Czech Republic The Czech republic Structural steel
05 5397
C38
G42
GMo-3
GMo-4
GMoCr-10
GMoCr-14
664.3
G637.40
G645.90

Chemical composition(mass fraction)(wt.%) of the G639.90

C(％) Si(％) Mn(％) Cr(％) W(%) Co(%) Nb(%)
1.80-2.40 Max 0.50 Max 0.50 25.0- 30.0 10.0-15.0 45.0-55.0 WiCo

Mechanical Properties of steel grade G639.90

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)
274 (≥) 912 (≥) 41 43 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 334

Physical Properties of steel grade G639.90

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
32 - -     0.23 -  
984 826 - 21.3 221   -  
488 - 44 13.2   432 113

Heat Treatment of steel grade G639.90

Heat treated : 1521°C - 1326°C

Technological Curves of steel grade G639.90

Cross Reference Table (Equivalent Grade) of G639.90

Grade Standard Country Application
G639.90 CSN Czech Republic The Czech republic Structural steel
UNS G10190 UNS USA General use carbon steel bar
T41902 UNS USA Alloy tool steel
T41904 UNS USA Alloy tool steel
T41905 UNS USA Alloy tool steel
T41906 UNS USA Alloy tool steel
T41907 UNS USA Alloy tool steel
Stellite 190 Stellite alloy
Stellite 190PM Stellite alloy
Stellite X90 USA Stellite alloy
90Cr3 DIN Germany Cold working alloy tool steel
90CrSi5 DIN Germany Cold working alloy tool steel
90MnCrV8 DIN Germany Cold working alloy tool steel
SK90 JIS Japan Carbon tool steel
TC90 JIS Japan Carbon tool steel
SS14:2900 SS Sweden Carbide for cutting tools
SS14:2900 SS Sweden Carbide for cutting tools
C90U ISO ISO Carbide for cutting tools
C90U ISO ISO Carbide for cutting tools
AISI 690 AISI USA precipitation hardening
G645.90 S1
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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...

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