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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] While most varieties of cast iron are weak in tension and brittle, ductile iron has much more impact and fatigue resistance, due ...
The ductile iron used to manufacture the pipe is characterized by the spheroidal or nodular nature of the graphite within the iron. [2] Typically, the pipe is manufactured using centrifugal casting in metal or resin lined moulds. [3]
Compacted graphite iron (CGI), also known as vermicular graphite iron (GJV, VG, [1] JV[2] or GGV from the German: "Gusseisen mit Vermiculargraphit"[3]) especially in non-English speaking countries, [4] is a metal which is gaining popularity in applications that require either greater strength, or lower weight than cast iron.
As a result, the properties of ductile cast iron are that of a spongy steel without the stress concentration effects that flakes of graphite would produce. The carbon percentage present is 3-4% and percentage of silicon is 1.8-2.8%.Tiny amounts of 0.02 to 0.1% magnesium , and only 0.02 to 0.04% cerium added to these alloys slow the growth of ...
Austempered Ductile Iron (ADI) is a form of ductile iron that enjoys high strength and ductility as a result of its microstructure controlled through heat treatment. While conventional ductile iron was discovered in 1943 and the austempering process had been around since the 1930s, the combination of the two technologies was not commercialized ...
Micrograph of grey cast iron. Gray iron, or grey cast iron, is a type of cast iron that has a graphitic microstructure. It is named after the gray color of the fracture it forms, which is due to the presence of graphite. [1] It is the most common cast iron and the most widely used cast material based on weight. [2]
Malleable iron is a good choice for small castings or castings with thin cross sections (less than 0.25-inch, 6.35 mm). Other nodular irons produced with graphite in the spherical shape can be difficult to produce in these applications, due to the formation of carbides from the rapid cooling. Malleable iron also exhibits better fracture ...
References. [3][4][5] Graphite (/ ˈɡræfaɪt /) is a crystalline allotrope (form) of the element carbon. It consists of many stacked layers of graphene typically in the excess of hundred (s) of layers. Graphite occurs naturally and is the most stable form of carbon under standard conditions.
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