max. diameter of forged rings: 5 meters. Main market:Europe,America, India... Test reports will be provided before the delivery of goods, including five test values as follows: A Chemical composition(C,Mn,P,S,Si,Cu,Ni,Cr,Mo,V,CE)B Mechanical properties(yeild strength,tensile strength,elongation,reduction of area)C Heat treatment(normalized,tempered,quenched,anneal)D Hardness(standard:NACE MR0175) ...