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Custom Aluminum Casting Parts
-- Steady & Reliable Manufacturer --
Brief Product Description
Custom aluminum casting parts are made to a buyer's own drawing, sample or performance requirement rather than from a catalog. Gravity casting in permanent molds is a common route because it yields dense, strong parts that respond well to T6 heat treatment. Buyers include motorcycle brands, valve manufacturers, machinery builders and trading companies that resell to their own customers.
Before placing an order, procurement teams usually review alloy and temper, part weight, wall thickness, mechanical properties, machining allowance, surface finish and mold ownership. They also ask how dimensional consistency is checked from batch to batch, since variation shows up quickly on an assembly line.
We handle melting, casting, heat treatment, machining, finishing and assembly in one factory, which lets us quote complete finished parts rather than raw castings. OEM and ODM projects are supported, and design feedback is free. New mold lead time is usually 25 to 40 days, and MOQ commonly starts at 100 to 300 pieces per item.
Each new part goes through first-article inspection before release, and hardness or dimensional checks follow the control plan we agree with you. Stored molds are kept dedicated to your project, which helps repeat orders match earlier batches.
Process
Gravity casting in permanent molds
Alloy
A356 aluminum, T6 heat treatment
Part Weight
About 0.2 to 25 kg
Machining
CNC turning, milling, drilling and tapping
Surface Finish
Shot blasting, polishing, powder coating, painting
Service
OEM and ODM, mold support, MOQ from 100 pieces
Product Overview
Custom aluminum casting parts are produced by pouring molten alloy into a reusable metal mold under gravity, a process often called permanent mold or gravity die casting. Because the metal fills slowly and solidifies in a controlled way, the structure is dense with limited gas porosity, which is why it is preferred for load-bearing and pressure-tight components.
After casting, parts are heat treated, often to T6 condition, to raise hardness and strength, then machined to final dimensions. Custom work starts from a drawing or sample, followed by feasibility review, mold design, first-article sampling and approval. The result is a part that fits your assembly and can be reproduced in later batches without changes.
Process
Gravity casting
Alloy
A356-T6
Weight
0.2 to 25 kg
Service
OEM and ODM
Main points for buyers
- Alloy and temper: State the alloy and heat treatment, such as A356-T6, and request test results if needed.
- Mold ownership: Define who owns the mold, how it is maintained and where it is stored.
- Machining allowance: Agree on stock left for machining and the datum scheme.
- Sampling plan: Confirm first-article inspection items and approval steps.
- Volume and repeat orders: Share annual quantity so mold investment and part price can be planned together.
Custom casting cost includes mold, metal, casting labor, heat treatment, machining, surface finishing, inspection and packaging. Complex cores, tight tolerances and long machining time raise the price, while larger quantities spread the mold cost. Ask suppliers to quote mold cost separately, to confirm whether machining and coating are included, and to state the Incoterm used.
Specification
| Parameter | Specification |
| Process | Gravity casting with permanent molds |
| Alloy | A356 aluminum alloy, other grades on request |
| Heat Treatment | T6, T5 or as cast per requirement |
| Part Weight | About 0.2 to 25 kg |
| Wall Thickness | From about 4 mm, typical |
| As-Cast Tolerance | ISO 8062 CT7 to CT9 |
| Machined Tolerance | IT8 to IT10, critical fits per drawing |
| Surface Treatment | Shot blasting, vibratory finishing, polishing, powder coating, painting |
| Mold Lead Time | 25 to 40 days, typical |
| Sample Lead Time | 7 to 15 days after mold approval |
| Inspection | Dimension check, visual inspection, hardness test on request |
| Documentation | Material certificate, first article report on request |
Application
Application Scenarios
| Industry | Typical Use | Key Requirement |
| Motorcycle | Engine covers, brackets, brake components | Strength and clean surface finish |
| Industrial valves | Gearbox housings and operator bodies | Heat treated strength and machined fits |
| Machinery | Housings, supports and mounting plates | Dimensional stability |
| Transport equipment | Structural brackets and fittings | Light weight with good fatigue behavior |
| Energy and utilities | Enclosures and covers | Corrosion resistant coating |
Target Customers
Motorcycle and Vehicle Brands
Need strong aluminum parts to a drawing, with stable repeat supply.
Industrial Equipment Makers
Need housings and brackets machined ready to assemble.
Sourcing Companies
Need one factory for casting, machining and finishing to simplify their supply chain.
Suitable and Unsuitable Uses
Suitable Uses
- Medium-volume parts that need higher strength
- Parts that need T6 heat treatment
- Components with thick sections or inner cores
- Projects that need mold investment kept modest
Unsuitable Uses
- Very thin-wall parts that call for die casting
- Extremely high annual volumes
- Parts that need non-aluminum materials
- Designs without any drawing, sample or specification
Selection Guidance
Usage Notes
- Approve first-article samples before mass production.
- Keep drawings and revision numbers aligned between both sides.
- Store parts dry and separated before coating.
- Verify hardness or strength on a sample from each heat treatment lot if needed.
- Notify the supplier promptly of any design change.
Advantages
20 gravity casting machines
A large casting floor gives us capacity for repeat orders and sudden increases. Dependable output helps you protect your own delivery schedule.
Own melting
Three non-ferrous smelting furnaces let us control alloy composition at the source. Consistent chemistry gives predictable strength and machining behavior.
Heat treatment in-house
Six heat treatment units allow T6 and related treatments without outsourcing. Shorter lead time and fewer handling steps reduce your total delay and risk.
Finished, not raw
CNC lathes, machining centers, shot blasting and painting complete the part in one plant. You receive parts ready to assemble, which saves your own processing cost.
Engineering feedback
Design review covers draft angle, section changes and gating before the mold is cut. Better castability cuts scrap and keeps price stable.
Quality system
ISO 9001 procedures apply from incoming ingot to final check. Records support your audits and corrective action requests.
Frequently Asked Questions
- Q: Can you make parts from a sample only?
- A: Yes. We measure the sample, confirm a drawing with you, and then start mold design after your approval.
- Q: What is the MOQ for custom casting?
- A: MOQ usually starts at 100 to 300 pieces per item, depending on size and machining. Trial quantities can be discussed.
- Q: How long does a new mold take?
- A: A gravity mold usually takes 25 to 40 days, with samples about 7 to 15 days after mold completion.
- Q: Which alloys can you cast?
- A: A356 is the most common. Other aluminum grades can be reviewed with your requirement.
- Q: Do you perform T6 heat treatment?
- A: Yes. Heat treatment is done in our own factory, and test records can be provided on request.
- Q: Can you machine and coat the parts?
- A: Yes. We offer CNC machining, shot blasting, polishing, powder coating and painting, so parts can ship ready to assemble.
- Q: Who owns the mold?
- A: Mold ownership is agreed in the quotation. We maintain the mold during production and keep it dedicated to your parts.
- Q: What information do I need for a quote?
- A: Please send a drawing or sample, material and temper, annual quantity, surface requirements and destination port.
Contact us to learn more
Tell us your drawing, sample or application for custom aluminum casting parts, together with material, finish and expected annual quantity. Our engineers will review the details and reply with a clear quotation, sampling plan and lead time.
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