Q345 steel specification and equivalent standard.Q345 steel specification Q345 steel belongs to 16Mn steel grade,usually it is produced in hot rolled state,hot rolled steel plate,hot rolled steel coil gb t 706 q345e h profile steel equivalent materialsheet,it has comprehensive mechanical and welding property,as it shows good performance in structural purposes,it is widely used as welding structural part in manufacturing of ship,railway and vehicles,bridges,boiler,pressure vessel container,steelQ345 Steel,Q345A Q345B Q345C Q345D Q345E Equivalent Dec 08,2019·Q345 Steel Properties.Q345 steel is a Chinese GB standard Low Alloy High Strength Structural Steel,material density is 7.85 g gb t 706 q345e h profile steel equivalent materialcm3,tensile strength is 470-630 Mpa,and yield strength is 345 MPa,it has better properties than Q235.According to GB gb t 706 q345e h profile steel equivalent materialT 1591 2008,Q345 material has 5 quality grades Q345A,Q345B,Q345C,Q345D and Q345E.Q345 steel
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