Chinese standards on manufacturing tolerances

GB/T 706-1988
Hot-rolled beam steel – Dimensions, shape, weight and tolerances

GB/T 707-1988
Hot-rolled channel steel – Dimensions, shape, weight and tolerances

GB/T 709-2006
Dimension, shape, weight and tolerances for hot-rolled steel plates and sheets

GB/T 6728-2002
Cold formed steel hollow sections for general structure – Dimensions, shapes,
weight and permissible deviations

GB/T 9787-1988
Hot-rolled equal-leg angle steel – Dimensions, shape, weight and tolerances

GB/T 9946-1988 Dimensions, shape, weight and tolerances for hot-rolled L-sectional steel

GB/T 11263-2005
The hot-rolled H and cut T section

GBT 17395-1998
Dimensions, shapes, masses and tolerances of seamless steel tubes