Groove steel is supplied in various sizes specified by by height(h)width(b)thickness(d) in mm. Specification range: 5-40#. (1)Hot rolled groove steel(GB707-88) Application: Used in construction, auto industry and other industries, usually used with I steel. (2)Hot rolled groove stee l(YB164-63) Spec range 5-40# Main application of groove steel: Construction and steel structures Additional Information The groove steel mainly uses in constructing structure and the vehicles manufacture and so on. It has the merits of good welding, the riveted joint performance and the synthesis mechanical property. Material billet to product the groove steel is the carbon amount to tie the steel (below0.25% carbon) or the low-alloy structural steel billet. The production groove steel can be delivered after hot-working forming, fire or hot rolling.