Metal casting & forging
Part of the Metallurgy & Metalworking sector
Metal casting and forging are shaping processes: casting pours molten metal into a mould, while forging shapes solid metal under force. This hub explains the main methods and how to find and compare verified casting and forging suppliers on Digibition.
Looking to source in this sector, or want your company to appear here? Browse the directory or list your company.
Overview
Casting forms a part by pouring or injecting molten metal into a mould and letting it solidify — methods include sand casting, investment (lost-wax) casting, die casting, gravity and low-pressure casting and centrifugal casting. It suits complex shapes and hollow forms across iron, steel, aluminium, brass, bronze and zinc alloys.
Forging shapes solid metal with compressive force, as open-die, closed-die (drop) or ring forging, usually hot but sometimes cold. Forged parts typically have refined grain flow and high strength, which is why they are chosen for loaded components such as shafts, flanges, crankshafts and fittings.
Buyers here are machine builders, automotive and off-highway makers, valve and pump manufacturers, and foundries seeking partners. On Digibition, foundries and forges publish verified profiles describing their processes and capacity, so professional buyers can discover and compare them by specialization and country.
What to check when sourcing
Casting and forging are contract manufacturing services, so you are buying process capability rather than a stock item. Start with the process and the metals the supplier runs, then the size and weight range of parts, the tolerances and surface finish achievable as-cast or as-forged, and any machining the supplier can add afterwards.
Clarify tooling: who owns and maintains the patterns or dies, the tooling lead time and cost, and the minimum order quantity that makes the tooling worthwhile. Agree how first articles are approved — for example a sample or first-article inspection before series release — and ask for the material certificate (such as EN 10204 3.1, given here only as an illustration) and any non-destructive testing your part needs.
Use the directory to shortlist suppliers by specialization and country, then contact several and compare capability, tooling terms and lead times before you commit.
What to check when sourcing casting & forging
| Criterion | What to look for |
|---|---|
| Process | Sand, investment, die or gravity casting; open- or closed-die forging |
| Materials | The iron, steel or non-ferrous alloys the supplier regularly runs |
| Size & tolerance | Weight range and the tolerances achievable as-cast or as-forged |
| Tooling | Pattern or die ownership, tooling lead time and cost, and MOQ |
| First article | Sample or first-article inspection and approval before series release |
| Testing & certs | Material certificate (e.g. EN 10204 3.1, example) and any NDT required |
Frequently asked questions
- What is the difference between casting and forging?
- Casting pours molten metal into a mould to form a part, which suits complex and hollow shapes. Forging shapes solid metal under force, giving refined grain flow and generally higher strength, which suits heavily loaded components. The best choice depends on the geometry, volume and load.
- Which casting process should I choose?
- Sand casting suits larger or lower-volume parts, investment casting gives fine detail and good surface finish, and die casting suits high volumes in non-ferrous alloys. The right method depends on part size, complexity, tolerance, material and quantity, so describe these when you enquire.
- Who pays for the tooling?
- Patterns and dies are usually a separate, one-time cost, and terms vary — some suppliers amortise it into piece price, others invoice it up front. Clarify who owns and stores the tooling, its lead time and the minimum order quantity that justifies it before committing.
- How do I find casting and forging suppliers?
- Use the Digibition directory to filter by this specialization and by country, then open each company profile to review its processes, certifications and specializations. You can message suppliers directly, or add several to a quote list and request quotes from all of them at once.
- What should I check before placing a production order?
- Confirm the process and material, the achievable tolerances and finish, tooling ownership and cost, and how first articles are approved. Agree the material certificate and any testing in writing before series release. This is general information, not legal or technical advice.
Looking to source in this sector, or want your company to appear here? Browse the directory or list your company.
Important notice
This page is general industry information published by Digibition for educational purposes only. It is not legal, financial, tax, customs, regulatory, or other professional advice, and it is not a substitute for advice from a qualified professional. Standards, certifications, duties, taxes, and regulatory requirements differ between countries and markets and change over time; nothing here is guaranteed to be accurate, complete, or current. Verify any requirement independently with a qualified adviser and the relevant competent authority before you act. Digibition is an online company directory and digital-fair platform; it is not a party to any transaction between users and does not endorse, guarantee, or accept responsibility for any third-party company, product, claim, or certification. A company being reviewed or approved for listing refers only to Digibition's internal listing review and is not a warranty of that company's quality, legality, solvency, or performance. Any mention of specific standards or certifications is illustrative and is not an endorsement or a statement of compliance. To the fullest extent permitted by applicable law, Digibition accepts no liability for any loss or damage arising from reliance on this page; any reliance is at your own risk.