Ashapura Steel & Alloys exports wide range of stainless steel 904L Refractory Anchor were originally created to combat corrosion problems caused by chloride-bearing cooling waters and other aggressive chemical process fluids. Called SS 904L Refractory Anchor because of its mixed micro structure with about equal proportions of ferrite and austenite, SS 904L Refractory Anchor are a family of grades, which range in corrosion performance depending on their alloy content