Trusted Since 1996

Precision Metal Casting
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Gujarat's dependable manufacturer of CI Casting, SG Iron, Stainless Steel Castings and Pulleys. We serve industries across India with unmatched quality and on-time delivery.

SG Iron Castings – Strength Meets Ductility

Spheroidal Graphite (SG) Iron, also known as Ductile Iron or Nodular Cast Iron, is a type of cast iron in which graphite is present as tiny spheres (nodules) rather than flakes. This unique microstructure provides excellent mechanical properties – combining the castability of cast iron with the strength and ductility of steel.

At Shree Metal Cast, we manufacture SG Iron castings using high-quality raw materials and controlled casting processes. Our SG iron castings conform to IS 1865, ASTM A536, and BS 2789 standards and are available in grades 400/12, 500/7, 600/3, and 700/2.

Our SG Iron castings find applications in critical fields such as automotive, hydraulics, agriculture, and heavy engineering, where both strength and toughness are essential.

SG Iron Casting by Shree Metal Cast

Grades & Mechanical Properties

Grade Tensile Strength (MPa) Yield Strength (MPa) Elongation (%) Hardness (HB) Application
SG 400/1240025012130–180General engineering, pipes
SG 500/75003207170–230Agricultural machinery, crankshafts
SG 600/36003703190–270Hydraulic cylinders, gears
SG 700/27004202225–305Heavy engineering, truck hubs
ParameterDetails
Casting ProcessSand Casting (Green Sand & CO&sub2; Mold)
Weight Range0.5 kg – 2000 kg
StandardsIS 1865 / ASTM A536 / BS 2789
Surface FinishShot Blasted / Machined
Heat TreatmentAnnealing, Normalizing, Stress Relieving
TestingUT, Hardness, Chemical, Tensile Testing

SG Iron vs CI – Why Choose SG Iron?

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Higher Tensile Strength

SG Iron has 2–3x higher tensile strength than conventional grey CI, making it suitable for load-bearing components.

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Superior Ductility

The spheroidal graphite structure provides significant elongation (up to 18%), unlike brittle grey cast iron.

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Excellent Impact Resistance

SG Iron absorbs shock and impact loads far better than CI, making it ideal for dynamic loading applications.

Good Machinability

SG Iron machines well, allowing tight tolerances and good surface finish for precision components.

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Fatigue Resistance

Better fatigue life than CI due to nodular graphite structure, ideal for cyclically loaded components.

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Cost Effective vs Steel

SG Iron offers near-steel properties at cast iron cost – an economical choice for many structural applications.

Industries & Applications

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Agriculture

Tractor components, pump casings, gear housings, and implement parts for farm machinery.

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Automotive

Crankshafts, brake drums, differential cases, steering knuckles, and suspension components.

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Hydraulics

Hydraulic cylinder bodies, valve blocks, manifolds, and pump housings requiring high pressure resistance.

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Heavy Engineering

Gear housings, machine tool components, press frames, and structural load-bearing parts.

Need SG Iron Castings?

We manufacture SG Iron castings in any grade, size, and weight as per your engineering requirements. Get in touch for a quote today.

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