... sale service From the nature, To the excellence NameSquare and rectangular tubesStandardASTM A554, A312, A249, A269 and A270Material Grade304,316,201 ... -100x100mm, 8.5-101.6mm, we can also accept sizes above 101.6mmThickness0.3mm - 3.5mmLength6m or as customers' request Tolerancea ... ≥30%≥30%≥35%≥35%Hardness (HV)<253<253<200<200 Rectangular tubes