Green Sand Casting Iron Parts with Gray Iron, Ductile Iron and other Metal Alloys. 

In RMC, we uses sand casting for parts made of grey iron, ductile iron, carbon steel, steel alloys or aluminium. The sand casting part's weights can vary from tens of grams to hundreds of kilograms. The applications of sand casting parts range from small parts like gears, pulleys, connecting rods, brackets and propellers to large components such as pump components, pipeline parts, manifolds, engine blocks, cylinder heads and transmission cases.

Apart from the green sand casting processes, we are also using other casting processes to pour cast iron, such as pre-coated resin sand casting (hot shell and core molding), furan resin sand casting and lost foam casting, vacuum casting and investment casting as well. 

▶ Materials Available for Sand Casting
• Cast Gray Iron:  GJL-100, GJL-150, GJL-200, GJL-250, GJL-300, GJL-350
• Cast Ductile Iron: GJS-400-18, GJS-40-15, GJS-450-10, GJS-500-7, GJS-600-3, GJS-700-2, GJS-800-2
• Aluminium and Their Alloys
• Other Alloys and Standards on request

▶ Capabilities of Sand Casting moulded by hand:
• Max Size of Sand Castings: 1,500 mm × 1000 mm × 500 mm
• Weight Range of Sand Castings: 0.5 kg - 500 kg
• Sand Casting Annual Capacity: 5,000 tons - 6,000 tons
• Casting Tolerances: On Request.

▶ Capabilities of Sand Casting by Automatic Molding Machines:
• Max Size: 1,000 mm × 800 mm × 500 mm
• Weight Range: 0.5 kg - 500 kg
• Annual Capacity: 8,000 tons - 10,000 tons
• Tolerances: On Request.

▶ Main Steps of Sand Casting and Shell Mold Casting
• Patterns & Tooling Design → Making Patterns → Moulding Process → Chemical Composition Analysis → Melting & Pouring → Cleaning, Grinding & Shot Blasting → Post Processing or Packing for Shipment

▶ How We Inspect the Cast Iron Castings
• Spectrographic and manual quantitative analysis
• Metallographic analysis
• Brinell, Rockwell and Vickers hardness inspection
• Mechanical property analysis
• Low and normal temperature impact testing
• Cleanliness inspection
• UT, MT and RT inspection

▶ Post-Casting Process
• Deburring & Cleaning
• Shot Blasting / Sand Peening
• Heat Treatment: Normalization, Quench, Tempering, Carburization, Nitriding
• Surface Treatment: Passivation, Andonizing, Electroplating, Hot Zinc Plating, Zinc Plating, Nickel Plating, Polishing, Electro-Polishing, Painting, GeoMet, Zintec
• Machining: Turning, Milling, Lathing, Drilling, Honing, Grinding,

▶ General Commerial Terms
• Main workflow: Inquiry & Quotation → Confirming Details / Cost Reduction Proposals → Tooling Development → Trial Casting → Samples Approval → Trial Order → Mass Production → Continuous Order Proceeding
• Leadtime: Estimatedly 15-25 days for tooling development and estimatedly 20 days for mass production.
• Payment Terms: To be negotiated.
• Payment methods: T/T, L/C, West Union, Paypal.