Glorysteelwork is the manufcture of hot rolled steel square bar in china, we could offer different grades square bar with high quality. http://www.glorysteelwork.com/hot-rolled-steel-square-bar/ square bar is widely used in cutain wall, engineering machinery, shipbuilding, elevator parts, crane rails and automobile industry. 1. Produce Standard: as the GB, AISI, ASTM, SAE, EN, BS, DIN, JIS Industry Standard 2. Produce process: Hot rolled 3. Heat treatment: Normalized / Annealed / Quenched+Tempered 4. Quality assurance: We accpet any third party inspection. Like SGS, BV inspect our products before shipping.