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 и Metal Grain Size Guide; relate to Metal Machinability Guide и Metal Wear Mechanisms Guide.

Качество

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.

Часто задаваемые вопросы

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