Oct 27, 2026technical discussion
raw casting internal quality check for ductile iron
ductile iron mechanical property check hardness,nodularity,tensile strength and yield strength,dyeing penetration NDT test
casting material：EN GJS450-10；
test items：1,hardness : HBW143-217；2，nodularity: 90%MIN（rising area :80%MIN）；3,ferrite structure 80%MIN,nodual count 30MIN nodules/mm²,graphite nodules size:90MAX
4,tensile strength and yield strength test；5, dyeing penetration test(PT test)
1、hardness test
samples area
2、metellurgy microscope test
A area：maginfication 100x，4% nitric acid and alcohol solution corrosion
B area: maginfication 100x，4% nitric acid and alcohol solution corrosion
C area: maginfication 100x，4% nitric acid and alcohol solution corrosion
3,tensile strength and yield strength test
4, PT test
conclusion: hardness qualified. Ferrite content for B area and C area is lower than 80%.Tensile strength and yield strength is acceptable.PT test is qualified
