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Ductile iron grades help to categorize castings based on three key metrics — tensile strength, yield strength, and elongation. These three key indicators of mechanical performance can help match an appropriate casting with its intended application.
The following table is showing all the ductile iron material grades for each country. So, if you are American, then you could choose 60-40-18, 65-45-12, 70-50-05 etc., if you are from Australia, then you could choose 400-12, 500-7, 600-3 etc.
Ductile iron, an alloy of iron and carbon, is a special type of cast iron having properties comparable to steel. Due to its unique microstructure, ductile iron exhibits high strength, durability, flexibility, and elasticity.
Ductile iron, also called spheroidal or nodular iron, is a type of cast iron known for its high strength and durability. It has graphite substantially spheroidal in shape that gives excellent machinability.
Ductile iron, also known as ductile cast iron, nodular cast iron, spheroidal graphite iron, spheroidal graphite cast iron [1] and SG iron, is a type of graphite-rich cast iron discovered in 1943 by Keith Millis. [2]
important characteristics of ductile iron (GJS). As reported into international standard UNI EN-1563 are present also three new grades of solid-solution strengthened ferritic ductile iron with fully ferritic matrix (known as high silicon ductile iron)[1] with equivalent tensile strength, a higher proof strength and a higher elongation after
Grey and Ductile iron is classified by grade; each grade of iron corresponds to its strength, elongation (ability to stretch) and other properties. Different countries use different grades and in the US there is a standard used by the automotive industry (SAE) and a General (ASTM) classification.
To create different grades of ductile iron, one must control the matrix structure around the graphite during the casting process or through subsequent heat treatment.
The grades of ductile iron are as follows: Grade 60-40-18. Grade 65-45-12. Grade 80-55-06. Grade 100-70-03. Grade 120-90-02. Separate ASTM standards pertain to austenitic ductile irons (ASTM A439 and A571) and special purpose ductile irons (ASTM A476, A716, A395 and A667). Key Properties. As with most grades of cast iron, ductile irons display:
Ductile grades will conform to ASTM A536, with the primary difference being the high nodule count and fine grain size inherent to the Dura-Bar continuous casting process.