About This Service
Sand casting is the most versatile casting process. We pour gray iron, ductile iron, carbon steel, stainless steel, aluminum, brass, and bronze daily in our 9,800 m² foundry. Weight range 0.5 to 500 kg per piece.
Three Size Classes: What We Pour
In addition to the regular products that we already produce.
Class A - Small Precision (0.5-5 kg)
Tolerance plus/minus 0.5-1.0 mm. Surface finish Ra 6.3-12.5 micrometer. Common materials: gray iron, ductile iron, aluminum. Pattern type: aluminum or resin. Typical parts: valve components, pump impellers, gear blanks.
Class B - Medium Castings (5-50 kg)
Tolerance plus/minus 1.0-1.5 mm. Surface finish Ra 12.5-25 micrometer. Common materials: iron, steel, aluminum, brass. Pattern type: wood, aluminum, 3D sand. Typical parts: pump housings, valve bodies, machinery bases.
Class C - Large Castings (50-200 kg)
Tolerance plus/minus 1.5-2.5 mm. Surface finish Ra 25-50 micrometer. Common materials: gray iron, ductile iron, carbon steel. Pattern type: wood or resin. Typical parts: heavy machinery bases, large pump casings, machine tool beds.
4 Common Defects and How We Prevent Them
Know these defects before you place an order. They are preventable with proper design and process control.
Sand Inclusions (Hard Spots)
Cause: Sand grains break loose from mold surface and become embedded. Prevention: Apply mold wash, control sand moisture, proper sand compaction.
Porosity (Voids Inside Casting)
Cause: Gas trapped in molten metal during solidification, or shrinkage during cooling. Prevention: Design risers, vent the mold, control pouring temperature.
Cold Shuts (Visible Seams)
Cause: Molten metal too cold or pouring too slow, premature solidification. Prevention: Pour 50-100 degrees C above alloy melting point, pour continuously.
Hot Tears (Cooling Cracks)
Cause: Tensile stress from non-uniform cooling combined with low ductility. Prevention: Uniform wall thickness, fillets at corners, proper riser placement.
Why Choose Our Sand Casting
0.5-500 kg Range
From small precision parts (Class A) to heavy industrial castings (Class C). Few foundries handle this range.
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Sample Products We Make
Click any product to inquire about a similar part for your application.
