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Q620

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Q620 Q690
#Q620

Description

China GBT Q620 China structural steel and alloy steel and Q620 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: Q620
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel Q620 GBT China China structural steel and alloy steel
Q420
Q420
Q460
Q460
Q460
Q500
Q500
Q550
Q550
Q620

Chemical composition(mass fraction)(wt.%) of the Q620

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Mo(％) B(%)
Max 0.18 Max 0.55 1.00-1.60 0.025 0.025 Max 0.80 Max 1.20 Max 0.60 Max 0.003

Mechanical Properties of steel grade Q620

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)
662 (≥) 561 (≥) 41 31 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 322

Physical Properties of steel grade Q620

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 - -     0.44 -  
643 911 - 21.3 421   -  
925 - 12 22.2   324 224

Heat Treatment of steel grade Q620

Heat treated : 1395°C - 1912°C

Technological Curves of steel grade Q620

Cross Reference Table (Equivalent Grade) of Q620

Grade Standard Country Application
Q620 GBT China China structural steel and alloy steel
Q620 GBT China China structural steel and alloy steel
Q620 Q690
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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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