steel castings parts by carbon steel for shipyard

Product Name:gear,rocker arm,support roller,roller boss,pinion,trunnion,bearing support, support frame,track roller,shell,hub,rudder,sternpost,quill shaft,marine anchor,marine anchor chain,slag pot etc. Material:Carbon steel,low alloy steel:ZG20SiMn,ZG50Mn,ZG35SiMn,ZG35CrMo,ZG35SiMnMo, ZG42CrMo,ZG40Cr,ZG34CrNiMo,ZG40Mn and so on. Process:Place a pattern in sand to create a mold; Incorporate a gating system; Remove the pattern;Fill the mold cavity with molten metal;Allow the metal to cool;Break away the sand mold and remove the casting. Standard&certificate:ASTM,BS,NF,DIN,JIS and so on; ISO 9001:2000 Weight:from 3 tons to 120 tons per piece Application: The products can be widely used in the area of cement mill,rotary kiln,shipbuilding, metallurgy,mine,sugar mill,powder plant,rail road,engine bed and so on. We can provide OEM service for cement mill and rotary kiln casting parts,marine steel casting parts,sugar mill machinery parts with carbon steel or low alloy steel. The casting parts can be supplied as following treatment: Heat Treatment: Normalized, normalized and tempered,quench and tempered Machining: Rough machined,semi-finished machined,finished machined Quality warranty and testing equipment: Magnetic powder inspection UT nondestructive test Dye inspection Leeb hardness testing equipment Machinery performance testing equipment Metallographic microscope Direct-reading spectrometer Features of our products: Durable Excellent tensile strength Accurate level of tolerance Resistance to corrosion Resistance to extreme temperature conditions Good dimensional accuracy Superb surface finishing Easy to use and install Possible defects: Defect Causes Unfilled sections Insufficient material Low pouring temperature Porosity Melt temperature is too high Non-uniform cooling rate Sand has low permeability Hot tearing Non-uniform cooling rate Surface projections Erosion of sand mold interior A crack in the sand mold Mold halves shift There are no these problems for us. Uniform wall thickness will ensure uniform cooling and reduce defects. A thick section, often referred to as a hot spot, causes uneven cooling and can result in shrinkage, porosity, or cracking. Corners Round corners to reduce stress concentrations and fracture Inner radius should be at least the thickness of the walls Machining allowanceAdd 0.0625 - 0.25 in. (0.16 - 0.64 mm) to part dimensions to allow for machining to obtain a smooth surface.