Compacted Graphite Iron castings
What is Compacted graphite Iron?
Compacted Graphite Iron (CGI), also called vermicular graphite because of its microstructure, has low nodularity which results in a form of iron that is half-way between gray and ductile iron. Its mechanical properties are those of a material that is not as brittle as gray iron, while not reaching the elongation of ductile iron.
Excellent thermal shock resistance of compacted graphite iron
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CG iron castings obtain better results for thermal fatigue than gray iron in certain applications, mostly when the brittle nature of gray iron becomes an inconvenient. It can often outperform both ductile iron castings and gray iron castings in applications with thermal shock resistance required. Fast cooling ingot mould are a great example of application with such high thermal shock resistance requirement. We can add perlitising elements to enhance the mechanical properties of CG iron just like we do with ductile iron. A ferritic matrix will still give more elongation, while a perlitic matrix will raise the tensile resistance of the material. Our team will be able to guide you so you can choose the best material for your needs. |
Microstructure of Compacted graphite iron under a 100X microscope. |
Patternless Compacted Graphite Iron casting
If you woud like a trial run foy your ingot mould or another part where you think CGI might be a solution, our new moulding technology could be a cost effective alternative to fabricate the parts to test the material.
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