Request metal casting: references, specification and costs
Metal casting covers one-off parts, technical runs and artistic objects. An aluminium component, an iron casting and a fine bronze object need different processes and suppliers. For the initial enquiry, the intended result matters. State function, size, quantity and available references; the foundry clarifies how to produce and finish a suitable part.
Technical casting or metal object?
Technical parts depend on function, interface dimensions and agreed materials. An artistic or decorative object may prioritise shape fidelity, visible details and finish. A replacement from an original also needs clarification of wear and missing information. Describe the use rather than choosing a process by name alone. Not every supplier works with every metal or object size.
Distinguish drawing, pattern and original
A drawing or CAD file describes the finished part. A casting pattern or pattern equipment is used to make the mould. The foundry needs to account for shrinkage, release, cavities and later machining. An existing part is not automatically a suitable unmodified pattern. For valuable originals, confirm whether they are preserved: direct lost-wax casting consumes the wax reference.
Derive the process from part and quantity
Sand casting is used for one-off parts and smaller runs, among other jobs. Other processes use reusable moulds or lost patterns. Suitability depends on metal, geometry, details and quantity. Cavities may need cores or special pattern stages. For recurring demand, ask which references can be reused and which costs recur with reorders. A supplier’s minimum quantities or size limits are not limits for the entire service.
| Starting point | Clarify with the foundry |
|---|---|
| CAD or drawing | Finished dimensions, alloy and pattern creation |
| Original or sample | Condition, moulding, protection and preservation |
| Existing pattern equipment | Suitability, condition and necessary changes |
| Different cast parts | Sizes, metal, quantity and finish per type |
Raw casting and finished part differ
After casting, removing gates and fettling form part of the agreed process. Heat treatment, drilling, milling, grinding or finishing may follow. Important fits may need machining to reach the required specification. Identify finished dimensions and visible faces. A raw casting quote is therefore not directly comparable to a ready-to-fit component or a polished art object.
Agree samples and inspections
Technical applications may need material records, dimensional checks or other agreed inspections. State known requirements early. For an object, a sample or reference surface helps agree colour and finish. Inspection needs to suit the use; a good surface alone does not prove the function of a loaded component. Agree who approves a sample and how deviations are handled before a run.
Compare total cost rather than metal price alone
Pricing may include pattern creation, equipment, metal, casting, finishing and inspection. For small quantities, initial preparation is often significant. Different objects cannot usefully be compared by total weight alone. For precious metals, clarify the material pricing basis too; do not confuse a current metal value with a fixed manufacturing price. Shipping, packaging and VAT also count.
| Comparison point | Matching basis |
|---|---|
| Part | Same reference, sizes, alloy and quantity per type |
| Preparation | Identifiable pattern, mould and core work |
| Specification | Raw casting or finished machining, finish and inspections |
| Repeat order | Use of existing references, storage, timing and transport |
The key information to start
Describe the part or object, function and approximate overall sizes. State desired metal, quantity and available drawings, patterns or originals. For different parts, one common description with quantity and specification per type is enough. Make clear whether you need raw castings, machined parts or a visible finish. An unknown casting process is no obstacle; the foundry develops the suitable concept with you.
Frequently asked questions
Are one-off parts possible?
Yes, suitable foundries also make one-off parts. Process and preparation depend on the object, metal and available reference.
Must I supply a finished mould?
No. A drawing, CAD model, sketch or sample may be the starting point. Any pattern or mould manufacture is clarified separately.
Will my original be preserved?
It depends on the process. Agree moulding and preservation before handover. A lost-wax reference is consumed in the corresponding direct casting process.
Is casting only for aluminium?
No. Suppliers work with different metals and alloys. State a known metal or the requirements; not every foundry offers the same choice.
Is a casting ready to fit?
Not automatically. Machining fits, holes or surfaces needs to be included in the agreed scope.
Why is weight not enough for price comparison?
Pattern, geometry, mould work, metal and finishing can vary greatly. Compare complete quotes for the same specification and quantity.
