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For frequently-used aluminum cast components Aluminum Casting Co., Inc. provides Fast-Cast services including customized inventory management. Our ductile castings undergo rigorous testing including spectrographic analysis, physical inspection, count accuracy and certifications to all quality requirements. Visit our website today to learn more about what we have to offer.
Imperial is a 40 year old company proud to produce quality ductile castings for American Industry. Imperial specializes in many quality components, from 8 oz to 400 lbs, and employs experienced and talented professionals dedicated to their customers' satisfaction. Imperial serves a wide range of industries with top-quality, cost-effective solutions. Call Imperial today!
Atlas is a full service ductile casting manufacturer that provides part evaluation and design assistance, prototypes, tooling development, pattern maintenance, raw parts, finishing (grinding, shot blasting, tumbling) and required secondary services. Major industry groups served include agriculture, construction, transportation and manufacturing. Please call now.
Specialty provides a wide range of ductile castings weighing between 1/4 pound & 250 lbs. and proudly serves the automotive, government, diesel, mining, power transmission, process machinery, agriculture, fluid handling & machine tool industries. Based on its ISO 9001:2000 certification & its demanding quality assurance procedures, Specialty focuses on meeting & delivering your exact needs.
General Foundry provides high quality ductile castings nationwide to a variety of industries. With a fully automated no-bake molding loop, state-of-the art systems, including a complete pattern shop for new wood & plastic patterns, alterations, gating, rigging & repairs, General has the capabilities to deliver to you the precision solutions you are looking for. Call General today.
Willman stands for quality ductile castings that you can count on for many years to come. As a leading manufacturer producing all types of precision components, weighing from ounces to 40,000 lbs, Willman can satisfy your demands for complex engineering solutions. Willman employs skilled workers & the most advanced equipment for economical production, giving you the quality assurance you want.
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Industry Information
Ductile Castings
As with all iron castings, the ductile casting materials are melted to a molten point before being poured into a mold. Cooling solidifies the metal part and is performed at controlled rates to further influence microstructure formation. This is integral to the mechanical success of castings as it also manipulates specific properties such as energy dissipation, corrosion and wear resistance, machinability, tensile strength and of course ductility. Though not as ductile as those which begin using nodular iron, post-production annealing can also provide significant improvements in the flexibility of cast components as it softens the iron. The improved elasticity and strength resulting from these processes allow for the use of ductile castings in a number of industries such as automotive, agriculture, water and sewage treatment, irrigation, ventilation, hydraulics, manufacturing, transportation, construction and building. Specific parts and components commonly made of ductile iron include gears, dies, crankshafts, suspension arms, frames, support beams, pipes, cylinder heads and calipers.
The elemental composition and cooling rates are essential to the production of ductile castings and should be carefully controlled during manufacturing. Like most metals, there are several standardized grades of ductile iron, each with a particular constitution and boasting varied tensile strengths and fracture elongation. A general guideline for the chemical analysis of these alloys, also known as spherulitic graphite cast iron or spheroidal graphite cast iron, is as follows. Nearly 95% of the metal is iron with carbon being the second most plentiful material at between 3.3 and 3.4%. Silicon follows closely comprising between 2.2 and 2.8% of the mass. Manganese levels are between 0.1 and 0.5% with sulfur and phosphorus both around 0.005%. As aforementioned, one of three different elements can be added to encourage slow graphite precipitation. These materials must make up between 0.03 and 0.05% of the alloy in order to be effective. This composition allows for the carbon to form in spheroids rather than flakes. This is achieved by introducing magnesium, cerium, yttrium or a combination of the three into low-sulphur and low-silicon molten iron before adding supplemental silicon. Cooling then produces a variety of matrix structures which promote ductility, elasticity and improved tensile strength.
