... and their machined products: 1.Material & Standard:grey iron,ductile iron,malleable iron,carbon steel,alloy steel(high Manganese steel,high Chromium steel ... ,rear frame,front frame,engine block,mill-ball,hammer,jaw plate,bucket tooth,front idler,excavator sprocket,link rod,Bucket link ... rod,barre liner,grate plate,top grate,open grate,front wall and rack etc.