Industry welding plate Sdandard :JB/T7974-99 Material:HT200-250,Ductile. Usage:apply to all kinds of test work,and the reference plane used to measure of precisionmaterial :high-strength cast iron HT200--300,the product has steadiness in precision, good wearproof ability, good materialBe good at producting the heavy castings about 100tons.1)Specifications: 100 * 100-3000 * 60002) materials and ...