Description:The ESR ingot we manufactured with max weight up to 75 tons, which was assessed the national key product and awarded the Provincial Prize for Progress in Science and Technology, has passed the test of Science and Technology Department of Shandong Province. Tongyu has become the largest ESR ingot manufacturer in China by then. Since 2009, we have successfully developed AP1000 ESR ingots for manufacturing the pipes of the third generation nuclear power station with Low Carbon and Nitrogen stainless steel ESR ingots; therefore, the problem of lacking of material for producing the third generation AP1000 power plant pipe has been solved. Now this kind of ingots is in mass production.