Cast Iron Guide: Grey, Ductile (SG) & Malleable Iron Grades & Uses

Cast Iron Guide: Grey, Ductile (SG) & Malleable Iron Grades & Uses

Short answer: Cast iron is iron-carbon-silicon with 2–4 % carbon, poured into moulds for parts where stiffness, wear resistance, damping and low cost beat high tensile strength. Grey iron’s graphite flakes damp vibration (engine blocks, machine beds); ductile (spheroidal-graphite) iron adds toughness and ductility (pipe, crankshafts, auto); malleable and white irons cover fittings and wear parts. Grade choice balances machinability, strength and shock resistance.

At a Glance

Cast Iron Guide: Grey, Ductile (SG) & Malleable Iron Grades & Uses chart
Figure 1 – Cast Iron Guide: Grey, Ductile (SG) & Malleable Iron Grades & Uses overview.

Iron Types

Cast iron pairs with Investment Casting Vs Die Casting 그리고 Metal Grain Size Guide; relate to Metal Machinability Guide 그리고 Metal Wear Mechanisms Guide.

품질

Microstructure and hardness checked per Metal Hardness Testing Methods, certified by Mill Test Certificate Guide. Inspect by Metal Ndt Guide.

Supply & QA

Protect castings via How To Prevent Metal Rust. HXSCO supplies cast-iron stock and components to spec.

Get a Quote

Tell HXSCO your requirements and we will respond with a competitive quote and lead time.

자주 묻는 질문

What is cast iron?

Iron with 2-4% C + Si, poured for stiff/wear parts.

Grey vs ductile?

Grey damps vibration; ductile adds toughness/ductility.

What is SG iron?

Spheroidal-graphite (ductile) iron — tough and castable.

Is cast iron weldable?

With preheat and nickel electrodes, yes — carefully.

Do you supply cast iron?

HXSCO supplies grey/ductile iron stock and parts.

Source Cast Iron from HXSCO

HXSCO supplies grey and ductile cast iron stock and machined components to your grade and drawing. Send your requirement for a quote.

Request a Quote

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