... steel flat bar The national standard specifications. material is: 60Si2Mn, 65Mn, SUP9, SUP7, 55CR3, 50CRV4, SAE5160, SA spring steel flat ... flat steel, the material is complete, complete specifications, the quality of absolute, there is a need of contact.Thickness ... customersThickness: 1.5MM-6MM; Width: 15MM-700MM. Length of the production according to customer demandMost specifications have spot, ...