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70AT

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60AT 100Q
#70AT

Description

Canada CSA 70AT Canada Engineering and steel structure and 70AT Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Structure Steel: 70AT
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel 70AT CSA Canada Canada Engineering and steel structure
44WT
50WT
60WT
70WT
50R
50A
60A
70A
50AT
60AT

Chemical composition(mass fraction)(wt.%) of the 70AT

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Mo(％)
0.20 0.15-0.40 1.00-1.60 0.025 0.035 0.7 0.25-0.50

Mechanical Properties of steel grade 70AT

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)
586 (≥) 464 (≥) 43 14 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 312

Physical Properties of steel grade 70AT

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
43 - -     0.41 -  
395 287 - 14.3 111   -  
115 - 43 44.2   441 323

Heat Treatment of steel grade 70AT

Heat treated : 1535°C - 1449°C

Technological Curves of steel grade 70AT

Cross Reference Table (Equivalent Grade) of 70AT

Grade Standard Country Application
70AT CSA Canada Canada Engineering and steel structure
60AT 100Q
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Jiangyou Longhai Special Steel Co.,Ltd.

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