... this industry specially for mining machinery Material:Carbon steel,low alloy steel:ZG20SiMn,ZG50Mn,ZG35SiMn,ZG35CrMo,ZG35SiMnMo,ZG42CrMo,ZG40Cr, ... and tempered,quench and temperedMachining: Rough machined,semi-finished machined,finished machined Quality warranty and testing equipment:Magnetic powder ... A thick section, often referred to as a hot spot, causes uneven cooling and can result in shrinkage ...