Grey iron can be melt in low temperature around 1500 ℃, and melted grey iron has very good liquid property, it means that grey iron casting can be designed as thin thickness 4.0mm only, but ductile iron will be difficult for 4mm thickness wall.
Grey iron is the cheapest material in all metal grade. It’s widely used in many usual application, such as Fence, solid pipe, lathe bed and others.
Grey/Gray Iron tensile strength normally ranges from 20,000 to 60,000 lb/in2 and is a function of chemistry, graphite morphology, and matrix microstructure. And yield strength or elongation is not normally required in Standard.
The most important property is that grey iron is very stable, it’s a good property for lathe bed and press machine body, and it also widely used as guide rail for lathe.
Grey iron also have good corrosion resistance property, it’s suitable for sewer system which don’t have pressure, such as EN877 soil pipe, gully grating.
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