At Fowler & Holden, we’ve spent over a century perfecting the art of casting. From infrastructure projects to OEM manufacturing, our clients rely on us for components that meet strict performance and compliance standards. But what defines casting quality – and how can you be sure you’re working with a supplier who meets the mark?
In this blog, we break down the quality standards in metal casting, including EN124 compliance, machining tolerances, and how they affect high-volume casting projects.
What Are Quality Standards in Metal Casting?
Quality standards in metal casting are the benchmarks that foundries must meet to ensure their products are safe, consistent, and fit for purpose. These standards cover:
- Material integrity.
- Dimensional accuracy.
- Surface finish.
- Mechanical performance.
- Regulatory compliance.
Depending on the industry, these requirements can be governed by EN, ASTM, ISO, or sector-specific standards. For example, drainage components must often meet EN124 to be used legally on UK roads.
EN124 and Why It Matters
EN124 is the European standard for gully tops and manhole covers installed in vehicular and pedestrian areas. It defines load classes, material requirements, and test procedures.
At Fowler & Holden, we are an EN124 compliant foundry. Our castings undergo rigorous testing for:
- Load-bearing capacity.
- Impact resistance.
- Fatigue performance.
- Dimensional control.
Choosing an EN124 compliant foundry ensures you’re buying products that are both safe and legally approved for public infrastructure.
Key Elements That Define High-Quality Castings
1. Correct Material Selection
The right material must suit the job – whether that’s grey iron for vibration damping or ductile iron for tensile strength. We work with all grades of ferrous metals and provide metallurgical advice during quoting.
2. Tight Machining Tolerances
After casting, most components require secondary machining. High-quality foundries maintain machining tolerances that ensure parts fit and function precisely.
We work to tight dimensional and geometric tolerances, especially for sectors like power generation and marine where performance depends on accuracy.
3. Surface Finish and Defect Control
A smooth, defect-free surface is critical for mechanical function and appearance. Our inspection teams check for:
- Shrinkage cavities.
- Cold shuts.
- Sand inclusion.
- Porosity.
Non-destructive testing (NDT) and pressure tests are used where needed.
4. Dimensional Consistency Across Batches
Consistency is essential in high volume casting UK projects. We use standardised patterns, CNC machining, and quality checks to ensure batch-to-batch repeatability.
This makes Fowler & Holden a preferred supplier for long-run projects requiring 100s or 1000s of consistent units.
5. Testing and Certification
We offer full certification with every order, including:
- Material traceability reports.
- Test bar analysis.
- EN or ASTM compliance.
- Dimensional and NDT reports (on request).
This level of documentation is essential for OEMs and public sector procurement.
What to Ask When Evaluating Casting Quality
- Are you an EN124 compliant foundry?
- Can you meet the machining tolerances my project requires?
- What controls do you have in place for high volume casting?
- Do you offer third-party certification?
- How do you handle quality issues or rework?
We welcome these questions and believe that transparency is key to successful long-term relationships.
FAQs
What industries require the highest casting standards?
Transport, infrastructure, oil & gas, and OEM manufacturing all demand strict compliance.
What is considered a tight machining tolerance?
Typical tolerances are within ±0.02mm, but tighter specs are possible depending on geometry.
Can you certify castings to both EN and ASTM?
Yes. We offer dual certification for projects that cross jurisdictions.
How do you ensure batch consistency in high volume casting?
We use process control sheets, pattern maintenance, and post-casting inspection.
What is EN124 and when is it needed?
EN124 governs drainage products like manhole covers used in roads. It’s mandatory for public works in the UK.
Why Fowler & Holden?
We don’t just meet quality standards – we help define them. As an EN124 compliant foundry with in-house machining and inspection, we ensure our castings meet every requirement you have.
For high volume casting UK projects, we offer dependable supply, repeatable accuracy, and expert support.
To discuss your casting specifications:
Contact us
Call: +44 (0)1472 355 316
Email: admin@fowlerandholden.co.uk
