316 stainless steel contains molybdenum added on the basis of 304 grade, delivering markedly improved resistance to pitting and crevice corrosion. It is particularly suitable for harsh corrosive working conditions such as seawater, chemical acids and alkalis, making it the preferred material for high-end precision castings.

WCB is a general-purpose carbon steel material featuring high strength and toughness with moderate cost. It is widely applied to precision castings such as valves and pump bodies operating under medium-low temperature and non-corrosive service conditions, boasting outstanding cost performance.

Grade 304 is the most commonly used austenitic stainless steel. It features excellent corrosion resistance, heat resistance and mechanical properties. Widely adopted in food processing, chemical industry, water treatment and other sectors, it serves as a fundamental material option for investment casting.