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UNI 40 Cr 4

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UNI 38 CrMo 4 KB UNI 40 CrMo 4
#UNI # #40

Description

UNI UNI 40 Cr 4 Alloy Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Alloy Steel: UNI 40 Cr 4
Category Type Steel Grade Standard Country Application
Steel GradesAlloy Steel UNI 40 Cr 4 UNI
UNI 25 CrMo 4 KB
UNI 30 NiCrMo 2 KB
UNI 34 Cr 4 KB
UNI 34 CrMo 4 KB
UNI 35 CrMo 4
UNI 35 CrMo 4 F
UNI 38 Cr 4 KB
UNI 38 CrB 1 KB
UNI 38 CrMo 4
UNI 38 CrMo 4 KB

Chemical composition(mass fraction)(wt.%) of the UNI 40 Cr 4

Element Weight %
C 0.32-0.38
Mn 0.50-0.90
Cr 0.70-1.15
P 0.035
S 0.040
Si 0.15-0.30

Mechanical Properties of steel grade UNI 40 Cr 4

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)
881 (≥) 683 (≥) 34 24 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 123

Physical Properties of steel grade UNI 40 Cr 4

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 - -     0.23 -  
562 979 - 21.3 224   -  
179 - 41 23.2   344 434

Heat Treatment of steel grade UNI 40 Cr 4

Heat treated : 1778°C - 1939°C

Technological Curves of steel grade UNI 40 Cr 4

Cross Reference Table (Equivalent Grade) of UNI 40 Cr 4

Grade Standard Country Application
UnitempAF2-1 USA Martensitic special steel
UnitempHS AISI USA Martensitic special steel
Q195 China Engineering and welding
Q215 China Engineering and welding
Q215 B China Engineering and welding
Q235 China Engineering and welding
Q235 B China Engineering and welding
Q235 C China Engineering and welding
Q235 D China Engineering and welding
Q255 A China Engineering and welding
Q255 B China Engineering and welding
Q275 China Engineering and welding
Q235q C China Bridge structure with steel
Q235q D China Bridge structure with steel
Q345q E China Bridge structure with steel
Q345q C China Bridge structure with steel
ASTM 1030 ASTM USA General use carbon steel bar
UNS G10300 UNS USA General use carbon steel bar
ASTM 1005 ASTM USA General use carbon steel bar
UNS G10050 UNS USA General use carbon steel bar
UNI 38 CrMo 4 KB UNI 40 CrMo 4
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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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