Postalloy Rail-Tuff welding wire is ideal for repair of carbon rail steel. Under severe impact (i.e. pounding or hammering), deposits quickly become tougher and harder. Produces high-strength crack resistant deposits. Mushrooming from impact is reduced by its high-yield strength. The 3/16"" diameter postalloy and flux coated welding wire is sold as a 10 lb minimum. Priced by the pound. 10 lbs per box. Must purchase in multiples of 10. Buy this and all your railroad track maintenance equipment from Industry-Railway Suppliers’ robust inventory.