... Tubes for Structural Purposes3. JIS G3441 Alloy steel tubes for machine purposes4. JIS G3444 Carbon steel tubes for general structural purposes5 ... , S275J2H, S355J0H, S355J2H TestChemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength,Elongation), Technical Properties (Flattening Test, Flaring Test, Bending Test, Hardness ...