EJ 411-1989 Technical specifications for 20MnNiMo steel (S-271) forgings for 300,000-kilowatt pressurized water reactor nuclear power plants (English Version)
1999EJ/T 411-1999 Specification for 508-Ⅲ steel forging used for safety calss Ⅰ pressure vessel for pressurized water reactor nuclear power plants
1989EJ 411-1989 Technical specifications for 20MnNiMo steel (S-271) forgings for 300,000-kilowatt pressurized water reactor nuclear power plants
EJ 411-1989 Technical specifications for 20MnNiMo steel (S-271) forgings for 300,000-kilowatt pressurized water reactor nuclear power plants was changed to EJ/T 411-1999 Specification for 508-Ⅲ steel forging used for safety calss Ⅰ pressure vessel for pressurized water reactor nuclear power plants.