VarietyAlloyTemperDiameter(mm)StandardRod & bar2x,4x,6x,7x seriesH112,F,O,T4,T66-120GB/T3191/GJB20541x,3x,5x seriesH112,O,F Industrial profile VarietyAlloyTemperCircumcircle Diameter(mm)StandardMinMaxIndustrial profile2x,6x,7x seriesH112,T,O,F10320GB/T6892,GB5237 GJB25071x,3x,5x seriesH112,O,F10320GB/T6892,GJB2507 Tube & pipe VarietyAlloyTemperSize(mm)StandardDiameterWall thicknessThink-wall pipe1x,3x,5x seriesO,H14,346-1300.5-5GB/T6893/EN2x,6x,7x seriesO,T4,T66-1300.5-5GB/T6893/ENThink-wall tube1x,3x,5x,8x seriesH112,O,F20-1805-40GB/T4437.1 GJB2381/EN2x,6x,7x seriesH112,T4,T6,O,F20-1805-40GB4437/GJB2381 ASTM/EN