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70A

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60A 50AT
#70A

Description

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

Datasheet for: Steel Grades:Structure Steel: 70A
Category Type Steel Grade Standard Country Application
Steel GradesStructure Steel 70A CSA Canada Canada Engineering and steel structure
60W
70W
38WT
44WT
50WT
60WT
70WT
50R
50A
60A

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

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Cu(%)
0.2 0.15-0.40 1.00-1.60 0.025 0.035 0.70 0.25-0.50 0.20-0.60

Mechanical Properties of steel grade 70A

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)
674 (≥) 213 (≥) 13 33 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 412

Physical Properties of steel grade 70A

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
13 - -     0.22 -  
388 361 - 42.3 211   -  
992 - 23 32.2   141 113

Heat Treatment of steel grade 70A

Heat treated : 1399°C - 1749°C

Technological Curves of steel grade 70A

Cross Reference Table (Equivalent Grade) of 70A

Grade Standard Country Application
OLC70A STAS/SR Romania Alloy structural steel
70A CSA Canada Canada Engineering and steel structure
70AT CSA Canada Canada Engineering and steel structure
60A 50AT
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Jiangyou Longhai Special Steel Co.,Ltd.

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