JYS Casting-Your Casting Specialist. Nanjing JYS Casting is a manganese steel, chrome steel, and alloy steel cast foundry. Our feature products include: Crusher Wear Parts, Shredder Wear Parts, Mill Liners, Apron Feeder Pans, Electric Rope Shovel Parts, and Crusher Spare Parts. JYS Casting foundry covers an area of 40 acres, a total investment of 70 million yuan.