Product Specifications
|
Parameter |
Value |
|
Dimensional Tolerance Standard |
GB/T 6414 CT4-CT6, small parts ±0.15~±0.4mm |
|
Surface Roughness |
Ra3.2-12.5μm |
|
Gate Residue |
≤0.5mm, ground flat without pits |
|
Internal Defect Standard |
UT Level 2, cracks prohibited, single pore ≤Φ1.5mm |
|
Geometric Tolerance |
Concentricity ≤0.2mm, Flatness 0.15/100mm |
|
Flash and Burrs |
≤0.3mm, fully removed before shipping |
|
Available Materials |
Carbon steel, alloy steel, stainless steel, copper alloy, aluminum alloy |
|
Heat Treatment |
Annealing, normalizing, quenching & tempering, solid solution as agreed |
High-Accuracy Castings for Critical Parts
Precision metal castings are our specialty for parts that need tight tolerances and good surface finish. We produce these castings for instrument components, valve cores and sleeves, and transmission parts. Our goal is to make castings that are close to the final dimensions. This means you need only minimal machining before assembly. We have been making precision castings for 23 years. Our factory has complete casting, heat treatment, and machining shops. We control the whole process from pattern to finished casting. This gives us better quality control than shops that rely on outside suppliers for some steps.
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Tight Tolerances and Good Surface Finish
Our precision castings meet GB/T 6414 CT4 to CT6 dimensional tolerance standards. For small parts, the tolerance is plus 0.15 to plus 0.4 millimeters. The surface roughness is Ra3.2 to 12.5 micrometers. This is considered good for cast components. The gate residue is less than 0.5 millimeters. We grind it flat and remove any pits. The internal inspection follows UT Level 2 standards. We strictly prohibit cracks. Individual gas pores cannot exceed 1.5 millimeters in diameter. We also control pore density to prevent clusters. The concentricity is within 0.2 millimeters. The flatness is within 0.15 millimeters per 100 millimeters of length. Flash and burrs are under 0.3 millimeters and are fully removed before shipping.
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Materials and Heat Treatment
We can produce precision castings in carbon steel, alloy steel, stainless steel, copper alloy, and aluminum alloy. The heat treatment is done in our own car-bottom resistance furnace. We can perform annealing, normalizing, quenching and tempering, or solid solution treatment as agreed. The choice of material and heat treatment depends on your application. Every melt is checked with a direct-reading spectrometer before pouring. This ensures the chemistry is correct for each batch. We keep all these records for traceability.
ISO-Certified Quality System
We are certified under ISO9001:2015. Every precision casting goes through first-piece, in-process, and final inspections. For critical pressure-bearing areas, we do both UT ultrasonic testing and MT magnetic particle testing. This double inspection catches internal and surface defects. All test reports and material certificates are provided with the shipment. Each batch is traceable to the specific melt number and operators. We are also recognized as a Fujian Provincial Science and Technology Enterprise. This recognition reflects our technical capability.
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