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.
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.
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) | Application |
|---|---|---|---|---|---|
| SG 400/12 | 400 | 250 | 12 | 130–180 | General engineering, pipes |
| SG 500/7 | 500 | 320 | 7 | 170–230 | Agricultural machinery, crankshafts |
| SG 600/3 | 600 | 370 | 3 | 190–270 | Hydraulic cylinders, gears |
| SG 700/2 | 700 | 420 | 2 | 225–305 | Heavy engineering, truck hubs |
| Parameter | Details |
|---|---|
| Casting Process | Sand Casting (Green Sand & CO&sub2; Mold) |
| Weight Range | 0.5 kg – 2000 kg |
| Standards | IS 1865 / ASTM A536 / BS 2789 |
| Surface Finish | Shot Blasted / Machined |
| Heat Treatment | Annealing, Normalizing, Stress Relieving |
| Testing | UT, Hardness, Chemical, Tensile Testing |
SG Iron has 2–3x higher tensile strength than conventional grey CI, making it suitable for load-bearing components.
The spheroidal graphite structure provides significant elongation (up to 18%), unlike brittle grey cast iron.
SG Iron absorbs shock and impact loads far better than CI, making it ideal for dynamic loading applications.
SG Iron machines well, allowing tight tolerances and good surface finish for precision components.
Better fatigue life than CI due to nodular graphite structure, ideal for cyclically loaded components.
SG Iron offers near-steel properties at cast iron cost – an economical choice for many structural applications.
Tractor components, pump casings, gear housings, and implement parts for farm machinery.
Crankshafts, brake drums, differential cases, steering knuckles, and suspension components.
Hydraulic cylinder bodies, valve blocks, manifolds, and pump housings requiring high pressure resistance.
Gear housings, machine tool components, press frames, and structural load-bearing parts.
We manufacture SG Iron castings in any grade, size, and weight as per your engineering requirements. Get in touch for a quote today.