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Q690

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Q690 Q235NH
#Q690

Description

China GBT Q690 China structural steel and alloy steel and Q690 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: Q690
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel Q690 GBT China China structural steel and alloy steel
Q460
Q460
Q460
Q500
Q500
Q550
Q550
Q620
Q620
Q690

Chemical composition(mass fraction)(wt.%) of the Q690

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Mo(％) B(%)
Max 0.18 Max 0.55 1.00-1.60 0.025 0.025 Max 1.20 Max 1.50 Max 0.60 Max 0.003

Mechanical Properties of steel grade Q690

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)
284 (≥) 325 (≥) 31 13 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 411

Physical Properties of steel grade Q690

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 - -     0.14 -  
224 874 - 44.3 112   -  
273 - 42 32.2   431 111

Heat Treatment of steel grade Q690

Heat treated : 1925°C - 1815°C

Technological Curves of steel grade Q690

Cross Reference Table (Equivalent Grade) of Q690

Grade Standard Country Application
Q690 GBT China China structural steel and alloy steel
Q690 GBT China China structural steel and alloy steel
Q690 Q235NH
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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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