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Hot sale Gray Iron Sand Casting Factory - Custom Malleable Cast Iron Shell Casting Product – RMC Foundry

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Hot sale Gray Iron Sand Casting Factory - Custom Malleable Cast Iron Shell Casting Product – RMC Foundry Detail:

The malleable cast iron castings are usually cast by green sand casting or resin coated sand shell mold casting processes at RMC casting foundry.

Cast irons are the ferrous alloys which have carbon contents of more than 2%. Though cast irons can have a carbon percentage between 2 to 6.67, the practical limit is normally between 2 and 4%. These are important mainly because of their excellent casting qualities. The gray cast irons, ductile cast irons (also called nodular cast iron or spheroidal graphite iron) and malleable cast iron are the three main cast iron in foundry.

The malleable cast iron has free carbon which is present in the form of nodules in the matrix of cementite and ferrite. This is achieved by first chilling the casting so that all white cast iron is formed, followed by a controlled heat treatment process so that some of the cementite is transformed to ferrite and nodules of free carbon. This material is more ductile than grey cast iron. This form is suitable only for components with very small section thicknesses since all white cast iron is to form the starting point for malleable iron.

Shell mould casting is a process in which the sand mixed with a thermosetting resin is allowed to come into contact with a heated metallic pattern plate, so that a thin and strong shell of mould is formed around the pattem. Then the shell is removed from the pattern and the cope and drag are removed together and kept in a flask with the necessary back-up material and the molten metal is poured into the mould.

Generally, dry and fine sand (90 to 140 GFN) that is completely free of the clay is used for preparing the shell moulding sand. The grain size to be chosen depends on the surface finish desired on the casting. Too fine a grain size requires large amount of resin, which makes the mould expensive.

Advantages of Resin Coated Sand Shell Mold Casting: 
1. Shell-mould castings are generally more dimensionally accurate than sand castings. It is possible to obtain a tolerance of +0.25 mm for steel castings and +0. 35 mm for grey cast iron castings under normal working conditions. In the case of close toleranced shell moulds, one may obtain it in the range of +0.03 to +0.13 mm for specific applications.
2. A smoother surface can be obtained in shell castings. This is primarily achieved by the finer size grain used. The typical range of roughness is of the order of 3 to 6 mircrons.
3. Draft angles, which are lower than the sand castings, are required in shell moulds. The reduction in draft angles may be from 50 to 75%, which considerably saves the material costs and the subsequent machining costs.
4. Sometimes, special cores may be eliminated in shell moulding. Since the sand has high strength the mould could be designed in such a manner that internal cavities can be formed directly with the need of shell cores.
5. Also, very thin sections(up to 0.25 mm) of the type of air-cooled cylinder heads can be readily made by the shell moulding because of the higher strength of the sand used for moulding.
6. Permeability of the shell is high and therefore no gas inclusions occur.
7. Very small amount of sand needs to be used.
8. Mechanisation is readily possible because of the simple processing involved in shell moulding.

Resin Coated Sand Casting Metal and Alloys
Metal & Alloys Popular Grade
Gray Cast Iron GG10~GG40; GJL-100 ~ GJL-350;
Ductile (Nodular) Cast Iron GGG40 ~ GGG80; GJS-400-18, GJS-40-15, GJS-450-10, GJS-500-7, GJS-600-3, GJS-700-2, GJS-800-2
Austempered Ductile Iron (ADI) EN-GJS-800-8, EN-GJS-1000-5, EN-GJS-1200-2
Carbon Steel C20, C25, C30, C45
Alloy Steel 20Mn, 45Mn, ZG20Cr, 40Cr,   20Mn5, 16CrMo4, 42CrMo,
40CrV, 20CrNiMo, GCr15, 9Mn2V
Stainless Steel Ferritic Stainless Steel, Martensitic Stainless Steel, Austenitic Stainless Steel, Precipitation Hardening Stainless Steel, Duplex Stainless Steel
Aluminium Alloys ASTM A356, ASTM A413,  ASTM A360
Brass / Copper-based Alloys C21000, C23000, C27000, C34500, C37710, C86500,  C87600, C87400, C87800,  C52100, C51100
Standard: ASTM, SAE, AISI, GOST, DIN, EN, ISO, and GB
CNC Precision Machining Capabilities
Facilities Quantity Size Range Annual Capacity General Accuracy
Vertical Machining Center (VMC) 48 sets 1500mm × 1000mm × 800mm 6000 tonn or 300000 pieces ±0.005
Horizontal Machining Center (VMC) 12 sets 1200mm × 800mm × 600mm 2000 tons or 100000 pieces ±0.005
CNC Machine 60 sets Max turning dia. φ600mm 5000 tons or 600000 pieces

ductile cast iron machined parts
alloy metal CNC machined parts
Shell Mold Casting Company


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 Custom Malleable Cast Iron Shell Casting Product – RMC Foundry detail pictures


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It adheres on the tenet "Honest, industrious, enterprising, innovative" to develop new items frequently. It regards buyers, success as its very own success. Let us produce prosperous future hand in hand for Hot sale Gray Iron Sand Casting Factory - Custom Malleable Cast Iron Shell Casting Product – RMC Foundry, The product will supply to all over the world, such as: New Orleans , Belgium , Czech , Item have passed by means of the national qualified certification and been well received in our main industry. Our expert engineering team will often be ready to serve you for consultation and feedback. We are able to also deliver you with cost-free samples to meet your specifications. Ideal efforts will probably be produced to provide you the most beneficial service and solutions. Should you be interested in our company and solutions, please make contact with us by sending us emails or call us straight away. To be able to know our solutions and enterprise. ar more, you'll be able to come to our factory to see it. We'll constantly welcome guests from all over the world to our firm. o build business enterprise. elations with us. Please feel absolutely free to speak to us for organization. nd we believe we will share the best trading practical experience with all our merchants.
  • The factory technical staff not only have high level of technology, their English level is also very good, this is a great help to technology communication.
    5 Stars By Cindy from Chile - 2018.02.08 16:45
    Although we are a small company, we are also respected. Reliable quality, sincere service and good credit, we are honored to be able to work with you!
    5 Stars By Eve from Oslo - 2017.07.07 13:00