... class, prime, newly produced, secondary , stock etc.Material/Steel gradeGR.B X42 X46 X52 X56 X60 X65 ... Length 18meters; Max Diameter 610mm;TestChemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Metallographic Test ... chemical plant, vessels, pipe work and for general mechanical engineering purposes;- applies to structural hollow sections and ...