Professional production: 60 si2mn, 55 crmna, Sup9, 50 crva, spring flat, with an annual output of 1000000 tons. Specification: t Professional production: 60 si2mn, 55 crmna, Sup9, 50 crva, spring flat, with an annual output of 1000000 tons. Specification: thickness 6 mm - 30 mm, width 60 mm - 130 mm. Welcome to contact. 60 si2mn spring flat