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Founded in 1919 Modern Aluminum Castings Co., Inc. can cast up to several thousand pounds per hour and produce parts weighing from one ounce to more than 100 pounds. We provide customers from a wide range of industries with quality spheroidal graphite cast iron. For those of you who are facing tight deadlines, our automated production ensures we might your tightest deadlines.
Imperial has grown from a 10 man shovel shop to a leading American manufacturer that employs up to 70 people in a fully automated source, capable of pouring 40-50 tons every day. Imperial's third generation professionals carry on the company's rich traditions of quality service-both in their precision manufactured spheroidal graphite cast iron solutions and their excellent customer service.
Atlas has been providing quality spheroidal graphite cast iron solutions and other secondary services since 1893. After more than a century of service to customers needing high quality parts, Atlas' solutions are used for a wide variety of industrial and commercial applications, including those from the trucking, agricultural and construction industries. Contact Atlas today!
Using 12 different testing criteria, Specialty offers various forms of mechanical & physical testing to ensure your spheroidal graphite cast iron components meet your specifications. From ultra-sonic & magnetic particle testing to microstructure & metal analysis, the QA team at Specialty is focused on quality components. Learn more about Specialty & visit its website, or call for more information.
General shows expertise in CNC machining, finishing and assembly and its General's quality, engineering and on time deliveries that keep its customers coming back. General does what it says it will do, when it says it will do it and at affordable prices, while also serving the community and respecting the environment. For spheroidal graphite cast iron parts you can trust in, turn to General.
Willman gives you the quality spheroidal graphite cast iron parts you want today . . . and tomorrow. The quality control equipment and technology employed at Willman includes a fully equipped laboratory for physical, chemical and mechanical testing, emission spectrograph, x-ray, statistical process control, full layout facilities and, most importantly, dedicated, knowledgeable, experienced people.
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Industry Information
Spheroidal Graphite Cast Iron
Industries such as agriculture, irrigation, ventilation, automotive, water and sewage treatment, hydraulics, manufacturing, transportation, construction and building utilize spheroidal graphite cast iron products which also offer improved corrosion and wear resistance, machinability, and thermal tolerances as compared to comparable grey iron castings. Whereas most iron castings develop graphite flakes, or three dimensional rosettes, spheroidal graphite cast iron is processed at temperatures and cooling rates conducive to the formation of nodular or spheroid graphite. The lower aspect ratio of spheroids as compared to flakes reduces length and increases particulate separation. The rounded or blunt edges of the nodules also help to inhibit cracking and alleviate the internal stresses inherent to graphitic flakes. The elemental composition of spheroidal graphite iron alloys is also slightly different than the average gray iron as fractional amounts of magnesium or cerium must be included in order to effectively control the morphological structure of the graphite.
Grades of these alloys are standardized and can be used to determine the tensile strength and elongation of a particular product or material. A basic chemical constitution of these alloys is as follows. 95% of the total mass is iron with carbon amounts between 3.3 and 3.4% and silicon levels ranging from 2.2 to 2.8% of the weight. Manganese levels are between 0.1 and 0.5% with sulfur and phosphorous each comprising around 0.005% of the total mass. Spheroidal graphite cast iron necessitates the presence of between 0.03 and 0.05% magnesium, cerium or a combination. To achieve the production of nodules low sulphur, low silicon iron is liquefied and magnesium or cerium added. This is followed by the addition of silicon to prevent the formation of cementite and ensure that the carbon precipitates as graphite spheroids. The molten metal is poured into a pre-formed mold designed with the impression of the desired part. Cooling is performed at specific rates to solidify the material and facilitate the formation of a pearlite or ferrite matrix structure. In this way iron foundries can produce ductile castings of such varied products as gears, crankshafts, cylinder heads, support beams and pipes.
