1.Alloy steel smelting, if want to produce high-end casting products, should choose the high quality metal materials; Common casting products, under the premise that ensure the quality of products should choose low cost raw materials. 

2.Alloy steel products, on the premise of meet the requirements of chemical products used by appropriate lower proportion of precious metal elements.

3, determine the liquid metal alloy ingredients should fully consider the various elements in the process of smelting melting. 

4, metal solution analysis results before furnace must be completely conform to the requirements of the casting chemical composition rules.