... dies for cutting sheet metals up to 12 mm thickness, trimming and spliting dies, cold piercing punches, performing punches, shear blades ... chisels, coining tools, cold shear blades, ejectors. 5.Tool steel 1.2250 specification as following : Round bar Grade1.2250 Flat bar ... inspection: 100% mixed test 100% crack test,defect depth max.1% of diameter(turned, peeled) or width 100% US test acc ...