Trusted UK Foundry for Military and Defence Projects
Boro Foundry has been a trusted supplier to the defence industry for over four decades, delivering high-integrity castings for mission-critical applications. Based in the UK, we offer a secure domestic supply chain with fast turnaround — ideal for armoured vehicles, naval vessels, and land-based defence systems.
Certified Quality and Full Traceability
We operate under strict quality control protocols, tailored to the exacting demands of the defence sector.
Our facilities allow us to carry out:
- Spectrographic analysis
- Microscopic examination
- Non-destructive testing (NDT)
- Full batch traceability
These processes ensure every casting meets rigorous technical and material standards.

Proven Delivery on Critical Components
One recent project involved a spheroidal graphite (SG iron) casting weighing over 2.5 tonnes — a vital component for an assurance-critical gearbox. Producing heavy-section SG iron castings of this size requires precise process control to meet mechanical property requirements.
By applying the right filtration systems and advanced pouring techniques, we achieved a clean, inclusion-free casting that passed all tests — where previous suppliers had failed. The customer chose Boro Foundry for our proven capability and delivered performance.
FREQUENTLY ASKED QUESTIONS
What defence applications do your castings support?
We supply castings for armoured vehicles, naval vessels, and land-based defence systems. Our components are used in assurance-critical assemblies where reliability is essential.
How do you ensure castings meet strict defence standards?
We follow stringent quality control protocols, including spectrographic analysis, microscopic examination, non-destructive testing (NDT), and full batch traceability. These processes guarantee material integrity and compliance with defence specifications.
Can you produce heavy-section SG iron castings?
Yes. We have proven capability in delivering large SG iron castings weighing several tonnes. Our process controls and filtration systems ensure that mechanical properties are achieved directly from the casting, without compromise.
Why choose a UK-based foundry for defence projects?
Working with a UK supplier provides a secure and reliable domestic supply chain, faster turnaround, and confidence that all castings meet British and international defence standards.
Have you successfully delivered critical defence projects where others failed?
Yes. For example, we produced a 2.5-tonne SG iron gearbox casting that passed all mechanical tests, where previous foundries had failed to meet requirements. Our track record demonstrates capability under the toughest conditions.