China Round Septic Tank Manhole Cover, Find details about China Manhole Cover, En124 from Round Septic Tank Manhole Cover
About ductile iron (Nodular iron)
Ductile iron, or nodular iron, obtains its special properties through the addition of magnesium into the alloy. The presence of magnesium causes the graphite to form in a spheroid shape as opposed to the flakes of gray iron. Composition control is very important in the manufacturing process. Small amounts of impurities such as sulfur and oxygen react with the magnesium, affecting the shape of the graphite molecules. Different grades of ductile iron are formed by manipulating the microcrystalline structure around the graphite spheroid. This is achieved through the casting process, or through heat treatment, as a downstream processing step.
Product feature
Name | Ductile manhole cover |
Material | Ductile iron GGG50/7, gray iron |
Standard | EN124/1433/1563 |
Class | A15,B125,C250,D400,E600,F900 |
Shape | Round, square, rectangle |
Size | 200mm-1200mm or as per customers' drawing |
Surface | Bituminous black |
Molding | DISA Line, Hand Modelling |
Process | Drawing-mould making-raw casting-sand blasting-rough machining-surface treatment-product inspection |
Advanced technology and equipments | Tensile strength: 500Mpa Yield stress: 320Mpa |
Load capacity | B125 C250 D400 E600 F900 |
Tolerance | Machining:+/-0.2mm, finish machining:0.2mm |
Application | Footway, car parks, main road, aircraft pavements |
Advantage | Longevity corrosion resistance, excellent anti-pressure |