GB / T6728 Q195 square tube chemical composition:
C≤0.12;Si≤0.3;Mn≤0.5;P≤0.035;S≤0.04
Thickness:1.5 - 15 mm;Outer Diameter:20*20-50*50mm
Technique:ERW
Surface treatment:oiled
Application:usually used in shipbuilding, solar bracket, steel structure engineering, electrical engineering, power plants, agricultural and chemical machinery, glass curtain wall, car chassis, airports, boiler construction, highway railings, housing construction, pressure vessel , oil storage tanks, bridges, power station equipment, lifting and transport machinery and other higher loads welded structure and so on.
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