Round steel yog cais raws li kub dov, forged thiab txias kos.Kub dov puag ncig steel yog 5.5-250 mm loj.Ntawm lawv: 5.5-25 hli me me puag ncig steel feem ntau mus rau txoj hlua ncaj nraim rau hauv cov khoom siv, feem ntau siv rau kev txhawb nqa tuav, bolts thiab ntau yam khoom siv;Round steel loj dua 25 hli, feem ntau yog siv los tsim cov khoom siv kho tshuab, seamless steel yeeb nkab dawb paug, thiab lwm yam.