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Investment Casting Jul 22, 2010

The process is generally used for small castings, but has produced complete aircraft door frames, steel castings of up to 300 kg and aluminium castings of up to 30 kg. It is generally more expensive per unit than die casting or sand casting but with lower equipment cost. It can produce complicated shapes that would be difficult or impossible with die casting, yet like that process, it requires little surface finishing and only minor machining.

Investment casting is used in the aerospace and power generation industries to produce turbine blades with complex shapes or cooling systems. Bla ...

Sand Casting Jul 22, 2010

Sand casting is used to produce a wide variety of metal components with complex geometries. These parts can vary greatly in size and weight, ranging from a couple ounces to several tons. Some smaller sand cast parts include components as gears, pulleys, crankshafts, connecting rods, and propellers. Larger applications include housings for large equipment and heavy machine bases. Sand casting is also common in producing automobile components, such as engine blocks, engine manifolds, cylinder heads, and transmission cases.

Sand casting is able to make use of almost any alloy. An advantage ...

Aluminum Casting Jul 20, 2010

Aluminum castings are used for many industrial applications, for example in the automotive industry, applications includes wheels, cylinder blocks and heads, pistons, brake cylinders, and suspension arms. The substitution of aluminum cast components for ferrous castings in the automotive sector is predicted to continue to grow as automakers continue to seek opportunities to reduce vehicular weight.

Die casting is a manufacturing process in which molten metal is injected, under considerable pressure, into a hardened steel die or ...

Cast Stainless Steel Jul 20, 2010

Cast steel: Cast Stainless Steels
Abstract: Stainless steel castings are usually classified as either corrosion-resistant castings or heat-resistant. The usual distinction between heat-resistant and corrosion-resistant cast steels is based on carbon content.
Cast stainless steels are most often specified on the basis of composition using the designation system of the High Alloy Product Group of the Steel Founders Society of America (the Alloy Casting Institute).

Stainless steels are a class of chro ...

Design Flexibility
There are many benefits of investment castings. The investment casting process or lost wax process produces near-net-shape configurations. This offers engineers design flexibility in many types of alloys. This process is capable of producing precise detail and dimensional accuracy in parts weighing many pounds to just a few ounces. Precision investment castings are able to reduce costs in many cases due to reduced machining and less materiel waste.

Wide Choice of Alloys  
Our investment casting foundry in China is able to utilize a wide variety of ...
The strengths of  Ductile Iron and cast steel are comparable. Ductile Iron has a higher minimum yield strength at 40k versus cast steel at 36k. Ductile Iron has corrosion and oxidation resistance that surpasses cast steel in most general utility service applications, i.e. water, saltwater, steam. Because of Ductile Iron’s spheroidal graphite microstructure, Ductile Iron is superior to steel in its ability to deaden vibration and therefore reduce stresses. An important factor in selecting Ductile Iron over cast steel is cost. The lower expense of Ductile Iron results from readily availabl ...

The strength of Ductile Iron when compared to cast iron is overwhelming. Ductile Iron tensile strength is 60k versus cast iron at 31k. Ductile Iron has a yield strength of 40k, whereas cast iron exhibits no yield, only ultimate fracture. Ductile Iron strength-to-cost ratio offers greater value for a marginal increase in cost over cast iron.

Cast Grey Iron Apr 16, 2010

Background

These are iron-carbon alloys (and a form of cast iron) with carbon contents in excess of 2%, generally in the range 2 to 4% with the addition of about 1% silicon. They differ from steels in that the carbon present exceeds the solubility limit of 1.7%. This carbon is present in the form of austenite while the excess exists as graphite at room temperature. Consequently, grey irons are sometimes referred to as steels with graphite in them.

Cast Ductile Iron Apr 16, 2010

Background

Chemically this material is the same as grey iron and is iron-carbon-silicon alloy. It is one of the more recent developments in cast iron technology and has been around since 1948. As the name suggests, it was developed to overcome the brittle nature of grey and white irons. It is also quite ductile in the as-cast form and negates the need for long heat treatments such as those required to produce malleable iron.

Chemistry

Like grey iron, ductile iron is an iron-carbon-silicon alloy. Typical carbon content is in the range 3 t ...