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Round bar Q345E,S355J2 steel rod,round bar Q355B
Round bar Q345E,S355J2 steel rod,round bar Q355B are all carbon structural round steel bars with different impact testing temperature.Round bar Q345E shall be done charpy impact test at -40 ℃,S355J2 steel rod done impact test at -20 degree centigrade.
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Round bar Q345E supplies according to standard specification GB/T 1591.
S355J2 steel rod,also called S355J2 round bar supplies from specification EN 10025-2.Other relative steel grades in EN 10025-2 includes S355JR round bar,S355J0 round bar and S355K2 round bar.
Round bar Q355B,is Round bar Q345B in old version GB/T 1591.Comparasion with round bar Q345E,Q355B round bar no need to be done low temperature impact testing,but these two grades owns the same tensile strength and yield strength.
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