Ductile iron

Ductile iron, Chinese standard:GB/T 1348-1998   Ductile iron cast a single test blocks of the mechanical properties and metallographic structure Grades Intensity of tensionσb≥/MPa Yield strengthσ0.2≥/MPa Elongationδ5≥(%) HardnessHBS The main metallographic structure QT400-18 400 250 18 130~180 Ferrite QT400-15 400 250 15 130~180 Ferrite QT450-10 450 310 10 160~210 Ferrite QT500-7 500 320 7 170~230 […]