Blocks have different metallurgy depending on strength needed. A Detrot Diesel DD15 would require a different strength alloy than a VW 2.5.
Figure 8 CGI typical microstructure: 5% nodularity, 9% graphite, 265 particles/mm2
.
Grade UTS (MPa) YS
(MPa)
E
(%)
HB 30
(typical results)
EN-GJV-300 300-375 220-295 1,5 140-210
EN-GJV-350 350-425 260-335 1,5 160-220
EN-GJV-400 400-475 300-375 1,0 180-240
EN-GJV-450 450-525 340-415 1,0 200-250
EN-GJV-500 500-575 380-455 0,5 220-260
Table 1 - CGI Grades German Standard VDG Merkblatt W50 (2002)
