Spheroidal graphite iron, commonly known as ductile iron or SG iron, is a material that has revolutionised modern casting applications. Recognised for its exceptional strength, ductility, and impact resistance, spheroidal graphite iron is the go-to solution for components that need to endure stress, pressure, and wear in demanding environments.
Dycer Foundry and Engineering specialises in casting a wide range of ferrous and non-ferrous materials, including SG iron grades from SG 42 to SG 80, to meet the precise requirements of industries such as mining, construction, transport, and energy.
What Makes SG Iron Special?
Unlike traditional grey cast iron, which contains flake-shaped graphite, spheroidal graphite iron has round nodules of graphite. This difference in graphite structure is achieved by adding small amounts of magnesium during the casting process, which transforms the graphite flakes into spheres, resulting in a material that is much more ductile and impact-resistant.
Key Benefits of SG Iron
- High tensile strength (comparable to steel in some grades)
- Excellent ductility and elongation
- Superior wear resistance and fatigue strength
- Good machinability
- Cost-effective compared to steel
- Corrosion resistance in harsh environments
Dycer Foundry and Engineering’s Capabilities
Dycer Foundry and Engineering casts SG iron components up to 450 kg and works with grades tailored to customer needs. We also provide austempered ductile irons (ADI) for improved wear resistance and strength.
To ensure top-tier quality, we partner with independent laboratories and heat treaters for detailed testing, microstructure analysis, and mechanical property verification.
Whether you need machined manifolds, couplings, or heavy-duty components, our expertise in spheroidal graphite cast iron gives you an edge in durability and performance.
FAQs about Spheroidal Graphite Iron
What is spheroidal graphite iron used for?
It’s used in components requiring high strength and toughness, such as gears, crankshafts, couplings, pump housings, and automotive parts.
Is SG iron better than grey iron?
Yes. Spheroidal graphite iron offers higher tensile strength, ductility, and impact resistance, making it more versatile and reliable under stress.
Can spheroidal graphite iron be machined?
Absolutely. It has excellent machinability, especially in its softer grades, allowing for precise fabrication.
Ready to Harness the Strength of Spheroidal Graphite Iron for Your Next Project?
Contact Dycer Foundry and Engineering today for expert advice, precision casting, and high-performance spheroidal graphite iron components tailored to your needs.