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Q345

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Q345 Q390
#Q345

Description

China GBT Q345 China structural steel and alloy steel and Q345 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: Q345
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel Q345 GBT China China structural steel and alloy steel
15CrMo
1Cr5Mo
12Cr2Mo
12SiMovnB
Q295
Q295
Q345
Q345
Q345
Q345

Chemical composition(mass fraction)(wt.%) of the Q345

C(％) Mn(％) P(％) S(％) V(%) Nb(%) Al(%) Ti(%)
0.18 0.55 0.025 0.025 0.02-0.15 0.015-0.060 0.015 0.02-0.20

Mechanical Properties of steel grade Q345

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)
797 (≥) 179 (≥) 23 41 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 213

Physical Properties of steel grade Q345

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 - -     0.12 -  
211 881 - 13.3 234   -  
786 - 14 42.2   411 243

Heat Treatment of steel grade Q345

Heat treated : 1973°C - 1359°C

Technological Curves of steel grade Q345

Cross Reference Table (Equivalent Grade) of Q345

Grade Standard Country Application
Q345q E China Bridge structure with steel
Q345q C China Bridge structure with steel
Q345q GBT China China structural steel and alloy steel
Q345q GBT China China structural steel and alloy steel
Q345q GBT China China structural steel and alloy steel
Q345 GBT China China structural steel and alloy steel
Q345 GBT China China structural steel and alloy steel
Q345 GBT China China structural steel and alloy steel
Q345 GBT China China structural steel and alloy steel
Q345 GBT China China structural steel and alloy steel
Q345GNH GBT China China structural steel and alloy steel
Q345GNHL GBT China China structural steel and alloy steel
Q345GJ-C GBT China China structural steel and alloy steel
Q345GJ-D GBT China China structural steel and alloy steel
Q345GJ-E GBT China China structural steel and alloy steel
Q345GJZ-C GBT China China structural steel and alloy steel
Q345GJZ-D GBT China China structural steel and alloy steel
Q345GJZ-E GBT China China structural steel and alloy steel
Q345 Q390
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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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