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Q390

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Q390 Q420
#Q390

Description

China GBT Q390 China structural steel and alloy steel and Q390 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: Q390
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel Q390 GBT China China structural steel and alloy steel
Q295
Q345
Q345
Q345
Q345
Q345
Q390
Q390
Q390
Q390

Chemical composition(mass fraction)(wt.%) of the Q390

C(％) Si(％) Mn(％) P(％) S(％) V(%) Nb(%) Al(%) Ti(%)
0.2 1.00-1.60 0.55 0.025 0.025 0.02-0.20 0.015-0.060 0.015 0.02-0.20

Mechanical Properties of steel grade Q390

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)
857 (≥) 442 (≥) 33 22 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 224

Physical Properties of steel grade Q390

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
42 - -     0.12 -  
167 275 - 13.3 322   -  
259 - 32 11.2   312 121

Heat Treatment of steel grade Q390

Heat treated : 1361°C - 1789°C

Technological Curves of steel grade Q390

Cross Reference Table (Equivalent Grade) of Q390

Grade Standard Country Application
Q390 GBT China China structural steel and alloy steel
Q390 GBT China China structural steel and alloy steel
Q390 GBT China China structural steel and alloy steel
Q390 GBT China China structural steel and alloy steel
Q390 GBT China China structural steel and alloy steel
Q390GNH GBT China China structural steel and alloy steel
Q390 Q420
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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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