Cast Iron Manhole Cover: Material: Ductile Iron GGG500-7 Standard: EN124 Load-bearing Class: A15, B125, C250, E600, F900 Ductile Iron Manhole Cover & Grating1. Our Ductile Iron Manhole Covers are widely used in public ... works.2. Material: Ductile Iron GGG500-7 & 400-12Grey Iron GG20 3. Designs Available:EN124 A15, B125, C250, D400, E600 and F900 A60005 for ...