GG25 Grey Iron Parts

GG25 Grey Iron Parts

Grey Cast Iron GG25 Material Castings Supplier Foundry China Star Grip Knob Product Description and Process Grey Cast Iron GG25 Material Castings Supplier Foundry China Star Grip Knob Production process: Green sand casting process pre-coated sand casting process resin sand casting process Weight...

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Grey Cast Iron GG25 Material Castings Supplier Foundry China Star Grip Knob

Product Description and Process

Grey Cast Iron GG25 Material Castings Supplier Foundry China Star Grip Knob


Production process:

Green sand casting process

pre-coated sand casting process

resin sand casting process

Weight range: from 50 gram to 5,000 kilograms for ductile iron casting product


Machining process:

CNC machine, machining center, lathe, mill machine, drill machine, etc.


Surface treatment process:

paint coating, electrophoretic paint coating, electrogalvanizing coating, black oxide coating, phosphate treatment,  powder coating, etc.


Product Material and Uses

Normally production with gray iron HT200, HT250, ductile iron 65-45-12, 60-40-18, 80-55-06, 80-60-03, 100-70-03, etc.

The grey iron casting products are widely used for Auto-cars, trains, trucks, vehicle components, mining machinery components, agricultural machinery parts, textile machinery parts, construction machinery parts, etc.


What is Grey Cast Iron?

Grey cast iron (a.k.a. gray iron) is a type of iron found in castings known for its grey color and appearance caused by graphite fractures in the material.  Specifically, what makes grey iron “grey iron,” is the graphite flake structure that is created during the cooling process from the carbon that is in the component.

Grey iron is a result of both the materials used and the process used to cast a part.  In other words, the properties of the grey iron will change depending on what materials are melted together to pour into the mold as well as the process that is used for casting (it is primarily the cooling part of the process that defines the characteristics of the cast part versus other parts of the process.).

If you use a powerful microscope you can see the graphitic microstructure that makes grey iron so easily identifiable.  In a grey iron casting, you can see little black flakes of graphite.  These flakes cause fractures and cause the material to have a grey appearance. The mechanical properties of grey iron are controlled by the size and shape of the graphite flakes present in the microstructure and can be characterized according to the guidelines given by the ASTM.


Grey Iron Magnified to Show the Flakes of Graphite

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