... , GB, BS, JIS, AISI, NF, etcProcessSand Casting, ESR casting, Die Casting, Investment castingWeight0.01kg- 150kgToleranceCT 4-9 grade, and ... . What are your main products? Precision casting parts, sand casting parts, machining parts, surface treatment parts, etc. The advantages & disadvantages of ... level of stability and minimise shrinking during the casting process. The metallurgy of grey iron also ...