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Q255

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Q255 Q275
#Q255

Description

China GBT Q255 China structural steel and alloy steel and Q255 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: Q255
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel Q255 GBT China China structural steel and alloy steel
50A
50AT
Q195
Q215
Q215
Q235
Q235
Q235
Q235
Q255

Chemical composition(mass fraction)(wt.%) of the Q255

C(％) Si(％) Mn(％) P(％) S(％)
0.18-0.28 Max 0.30 0.40-0.70 0.045 0.045

Mechanical Properties of steel grade Q255

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)
492 (≥) 656 (≥) 34 21 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 421

Physical Properties of steel grade Q255

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
44 - -     0.31 -  
182 939 - 42.3 221   -  
138 - 43 13.2   323 312

Heat Treatment of steel grade Q255

Heat treated : 1423°C - 1574°C

Technological Curves of steel grade Q255

Cross Reference Table (Equivalent Grade) of Q255

Grade Standard Country Application
Q255 A China Engineering and welding
Q255 B China Engineering and welding
Q255 GBT China China structural steel and alloy steel
Q255 GBT China China structural steel and alloy steel
Q255 Q275
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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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