# Grey and ductile iron castings from India: process and clusters

> How grey and ductile iron castings are made in India, step by step, and where: Kolhapur, Coimbatore and Rajkot. QA tests, HS heading and lead times.

Source: https://sourcesquid.co/india-atlas/products/iron-sand-castings/

Product guide

# Grey and ductile iron castings. From pattern making to inspection.

Grey and ductile iron castings are best sourced from Kolhapur, Coimbatore, Rajkot, Batala, Belagavi, Kolkata–Howrah and Agra. Indian foundries pour iron castings from under a kilogram to several tonnes for pumps, machinery, vehicles, agriculture and infrastructure.

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7
    process steps

7
    mapped clusters

7325.10
    typical HS heading

Where India makes it · **Grey and ductile iron castings** 7 clusters

  * __Clusters for this product
  *  __Other clusters

The manufacturing chain

## How it is made, in 7 steps.

The sequence Indian factories follow, from raw material to an approved part ready to ship.

  1. **Pattern making** Wood, metal or resin patterns and core boxes
  2. **Moulding** Green-sand or no-bake moulds with cores
  3. **Melting & pouring**Induction melting; inoculation and magnesium treatment for ductile iron
  4. **Knock-out & fettling**Sand removed, risers cut, grinding
  5. **Heat treatment** Annealing or normalising as specified
  6. **Machining & painting**Critical faces machined, primer applied
  7. **Inspection** Chemistry, microstructure, hardness and dimensions

Key facts

## What buyers plan around.

Typical HS heading
    7325.10 (non-malleable cast iron), 7325.99; parts often by function  
[Check 7325.10 in the HS code finder](https://sourcesquid.co/tools/hs-code-finder/?q=7325.10)

Lead time
    Patterns and samples 4–6 weeks, production 6–8 weeks

India's edge
    India has one of the world's largest foundry industries, giving buyers a wide choice of capacity and specialisms.

Materials
    

  * [Cast iron (grey and ductile)](https://sourcesquid.co/india-atlas/materials/cast-iron/)

Process families
    

  * [Casting & foundry](https://sourcesquid.co/india-atlas/processes/casting-and-foundry/)
  * [Machining & precision](https://sourcesquid.co/india-atlas/processes/machining-and-precision/)

Where to source

## The clusters that make it.

Listed in the order buyers usually start. Each page covers the nearest ports and neighbouring clusters.

[ Maharashtra Major cluster **Kolhapur** Foundry, Kolhapuri chappals, jaggery Casting & foundryLeather & footwearFood, spices & agri ](https://sourcesquid.co/india-atlas/clusters/kolhapur/)[ Tamil Nadu Major cluster **Coimbatore** Pumps, motors, wet grinders, textile machinery, foundry Casting & foundryMachining & precision ](https://sourcesquid.co/india-atlas/clusters/coimbatore/)[ Gujarat Major cluster **Rajkot** Diesel engines, submersible pumps, bearings, aluminium castings, machine tools Casting & foundryMachining & precisionForging ](https://sourcesquid.co/india-atlas/clusters/rajkot/)[ Punjab Established cluster **Batala** Castings, agricultural implements, machine tools Casting & foundryMachining & precision ](https://sourcesquid.co/india-atlas/clusters/batala/)[ Karnataka Established cluster **Belagavi** Foundry, aerospace precision, hydraulics Casting & foundryMachining & precision ](https://sourcesquid.co/india-atlas/clusters/belagavi/)[ West Bengal Major cluster **Kolkata – Howrah** Foundry & engineering, leather goods Casting & foundryLeather & footwearMachining & precision ](https://sourcesquid.co/india-atlas/clusters/kolkata/)[ Uttar Pradesh Major cluster **Agra** Footwear, foundry, marble inlay, durries Leather & footwearCasting & foundryStone & marble ](https://sourcesquid.co/india-atlas/clusters/agra/)

Quality

## Tests we plan for.

The checks that usually sit in the inspection plan for this product. We agree the final list with you against your drawing and market.

[How our inspections work](https://sourcesquid.co/quality/)

  * Chemical analysis per heat
  * Tensile and hardness tests from test bars
  * Microstructure and nodularity (ductile iron)
  * Dimensional check
  * Pressure test for fluid-handling parts

Grey and ductile iron castings questions

## Straight answers.

Anything else, ask us directly. A principal replies, not a bot.

[anirudh@sourcesquid.co](mailto:anirudh@sourcesquid.co)

### What moulding methods are used?

Green-sand moulding for high volumes, and no-bake resin sand for larger or lower-volume parts.

### Can foundries machine castings?

Yes. Most export foundries machine castings in-house or through nearby partners.

### Which standards are common?

IS 210 and IS 1865, EN 1561 and EN 1563, and ASTM A48 and A536.

More product guides

## Related products.

[6 steps**Pump and valve components** Coimbatore, Rajkot, Ahmedabad](https://sourcesquid.co/india-atlas/products/pump-valve-components/)[6 steps**Investment castings (steel, stainless)** Rajkot, Coimbatore, Pune](https://sourcesquid.co/india-atlas/products/investment-castings/)[6 steps**Brass & metal home décor**Moradabad, Aligarh, Jodhpur](https://sourcesquid.co/india-atlas/products/brass-metal-home-decor/)

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