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Q550

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Q550 Q620
#Q550

Description

China GBT Q550 China structural steel and alloy steel and Q550 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

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

Chemical composition(mass fraction)(wt.%) of the Q550

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Mo(％) B(%)
Max 0.18 Max 0.55 1.00-1.60 0.025 0.025 Max 0.60 Max 1.00 Max 0.40 Max 0.003

Mechanical Properties of steel grade Q550

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)
943 (≥) 657 (≥) 41 14 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 133

Physical Properties of steel grade Q550

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 - -     0.44 -  
147 981 - 32.3 131   -  
831 - 24 33.2   224 434

Heat Treatment of steel grade Q550

Heat treated : 1267°C - 1247°C

Technological Curves of steel grade Q550

Cross Reference Table (Equivalent Grade) of Q550

Grade Standard Country Application
Q550 GBT China China structural steel and alloy steel
Q550 GBT China China structural steel and alloy steel
Q550 Q620
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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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