... seamless steel tubing: Applicable to the general structure, mechanical structure with seamless steel tubes. Standard GB/T8162 , ... random Test: Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Flaring Test, ... A 519 seamless carbon and alloy steel for mechanical tubing ASTN A 556 seamless cold-drawn carbon ...