Materials:According to customer's demands,Website:http://www.eamachine.com, we are available of stainless steels, carbon steels, alloy steels, alloy tool steels, 316L, 316, 304, 304L, 1.4432, 1.4462, 1.4301, 1.4404, 1.4418, F51, 2205, 25CrMo4, 42CrMo4, 16MnCr5, Ck45, P280GH, 40Cr, 41Cr4, 17CrNiMo6, 34CrNiMo6, ST52-3, S355J2, S355J2G3, S355JR ,1.2379, Mo12Cr1V1, etc.Manufacturing ways: Roll forged, rough turned, heat treated, CNC turned, milled, drilled, threaded, grinded, etc.Heat treatment:Annealing, Normalizing, Quenching+Tempering(Q+T), Hardening, etc.Ring sizes: From 20mm to 4000mm.Weight: From 1kg/pc to 10,000kg/pc.We had very flexible productions of the rolled rings, small batch is also available for us.