Welding & joining
Part of the Metallurgy & Metalworking sector
Welding and joining fuse or bond metal parts into assemblies — MIG, TIG, arc and spot welding, brazing and soldering. This hub explains the main methods and how to find and compare verified welding suppliers on Digibition.
Looking to source in this sector, or want your company to appear here? Browse the directory or list your company.
Overview
Welding joins metals by melting the edges, usually with a filler, so they fuse as they cool. Common arc processes include MIG/MAG (gas metal arc), TIG (gas tungsten arc), stick (manual metal arc) and submerged-arc welding, alongside resistance spot welding for sheet, plus brazing and soldering, which join without melting the base metal.
Because a weld is only as good as the procedure and the operator behind it, welding is defined by capability and qualification rather than by a product. Suppliers differ in the processes they run, the materials and thicknesses they weld, the positions they can work in, and whether they hold qualified welding procedures and certified welders for demanding work.
Buyers here include fabricators, structural and pressure-equipment makers, machine builders and maintenance operations. On Digibition, welding and fabrication workshops publish verified profiles describing their processes and qualifications, so professional buyers can discover and compare them by specialization and country.
What to check when sourcing
Welding is a contract service where quality and traceability matter as much as price. Start with the process and the materials — carbon steel, stainless, aluminium and others behave very differently — then the thickness range and joint types, and whether the work is structural or pressure-bearing and so needs qualified procedures.
For demanding applications, ask whether the supplier holds qualified welding procedures (such as a WPS) and certified welders to the standard your sector references, and how welds are inspected — visual, dye-penetrant, or radiographic and ultrasonic non-destructive testing. Agree a first-article or sample weld approval before a series, and clarify material certificates (such as EN 10204 3.1, given here only as an illustration) and traceability where required.
Use the directory to shortlist suppliers by specialization and country, then contact several and compare process, qualification and inspection before you commit.
What to check when sourcing welding & joining
| Criterion | What to look for |
|---|---|
| Process | MIG/MAG, TIG, stick, submerged-arc, spot welding, brazing or soldering |
| Materials & thickness | The metals and thickness range the supplier regularly welds |
| Qualification | Qualified welding procedures and certified welders where the work demands |
| Joint & position | Joint types and welding positions the supplier can work in |
| Inspection | Visual, dye-penetrant or radiographic/ultrasonic NDT as required |
| Certs & traceability | Material certificate (e.g. EN 10204 3.1) and traceability where needed |
Frequently asked questions
- What is the difference between MIG and TIG welding?
- MIG/MAG welding feeds a consumable wire and is fast and productive for general fabrication. TIG welding uses a non-consumable tungsten electrode and gives precise, clean welds, often on thinner or stainless and aluminium work. The right process depends on material, thickness and finish.
- What is a welding procedure and why does it matter?
- A qualified welding procedure (often a WPS) records the tested settings — material, filler, current, technique — proven to produce a sound weld. For structural and pressure work, using qualified procedures and certified welders is how buyers gain confidence that welds meet the required standard.
- How are welds inspected?
- Welds may be checked visually, by dye-penetrant for surface cracks, or by non-destructive testing such as radiography or ultrasonics for internal defects. Agree which inspection and documentation your application needs before production so the supplier can plan for them.
- How do I find welding and joining 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, materials and thickness range, the qualifications the work requires, and the inspection and documentation you need. Agree a first-article or sample weld approval before a series run. 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.