High-quality grey iron and ductile iron castings for automotive, industrial machinery, pumps, valves and construction sectors. ISO-quality assured, exported to 30+ countries.
Iron casting is one of the oldest and most versatile metal-forming processes — molten iron is poured into prepared moulds, allowed to cool and solidify, and then cleaned and finished to produce components of exceptional strength, durability and design complexity.
At Audhe Industries, we have been producing precision iron castings from our foundry in Coimbatore — India's foremost manufacturing hub — since 2010. With over 15 years of foundry expertise, a modern induction-furnace melting shop, and rigorous quality control backed by spectrometer analysis and CMM dimensional inspection, we deliver iron casting components that consistently meet demanding international standards.
Whether you require small prototype batches or high-volume production runs, we handle every stage in-house — from pattern making and mould preparation through to melting, casting, cleaning, machining and final inspection — giving you a single accountable supplier with full traceability.
FG 150 to FG 350 grades for general engineering, pump bodies and machinery housings
SG iron for high-impact, high-strength automotive and structural applications
0.5 kg to 500 kg per piece, prototype to mass production
COC, COO, material test reports, PPAP and packing lists for every shipment
We manufacture two primary categories of iron castings, each suited to specific mechanical requirements, service environments and cost targets. Our metallurgy team helps you choose the right grade for your application.
Grey cast iron is the most widely used iron casting material, named for its grey fracture surface caused by graphite flakes in the microstructure. Excellent vibration damping, machinability and compressive strength make it the go-to choice for engine blocks, pump casings, gearbox housings, machine beds and brake components.
We produce grey iron castings across FG 150, FG 200, FG 260, FG 300 and FG 350 grades per IS 210 and equivalent international standards (EN-GJL, ASTM A48). Our induction furnace ensures consistent chemistry and properties in every heat.
Ductile iron (also called spheroidal graphite or SG iron) contains graphite in spherical nodule form, giving it significantly higher tensile strength, impact resistance and ductility compared to grey iron. Ideal for parts subject to shock loads, bending stresses and dynamic service conditions such as crankshafts, axle housings, suspension arms and pipe fittings.
We manufacture SG iron castings per IS 1865 grades SG 400/15, SG 500/7, SG 600/3 and SG 700/2, with magnesium treatment, inoculation and post-cast heat treatment available to achieve required mechanical properties.
Every iron casting we produce follows a structured, quality-gated process — from your initial drawing to verified shipment. Here is an overview of the eight key stages.
Precision iron castings are born from a sequence of carefully controlled steps. Here is how we approach each stage at our Coimbatore foundry.
A casting is only as good as its pattern. Our skilled pattern makers work from your engineering drawings or 3D CAD models to create precise patterns in wood, aluminium or polyurethane foam. Every pattern incorporates:
Patterns are inspected against a first-article dimension check before any production casting begins. Tooling is stored and maintained for repeat orders, reducing lead times on subsequent batches.
We select the moulding process based on your casting's complexity, dimensional tolerance requirement and surface finish specification:
Core boxes for internal cavities are manufactured in-house and cores are cured and assembled with precision to maintain consistent wall thickness throughout the casting.
Our induction furnace melting shop provides precise control over iron chemistry. Key steps include:
Every heat is accompanied by a spectro report retained as part of the batch quality record.
After pouring, castings are allowed to cool in the mould for a controlled time period before shakeout. Premature shakeout causes residual stress and cracking; delayed shakeout reduces throughput. Our scheduling team optimises both quality and efficiency.
Quality at Audhe Industries is not a final checkpoint — it is embedded at every process stage. Our QC capabilities for iron castings include:
Full inspection reports, first-article reports and PPAP documentation are provided on request. Rejection rates are consistently maintained below 0.5%.
Our grey and ductile iron castings are trusted across a wide spectrum of sectors — from high-volume automotive production to precision-engineered hydraulic and defence components.
Engine blocks, brake drums, disc rotors, differential cases, flywheel housings, gearbox casings
Pump casings, impellers, valve bodies, bonnets, flanges and hydraulic manifold blocks
Manhole covers, drainage grates, counterweights, crane components and lifting hardware
Plough components, tractor parts, sprocket hubs, bearing housings and equipment frames
Machine bases, bed plates, brackets, pulleys, counterweights and jig and fixture plates
Armour brackets, ballistic housings, winch drums, and pressure-retaining components
Pulley wheels, bearing blocks, cam levers, loom frame components and machine housings
Ductile iron pipe fittings, flanged joints, bends, tees and sluice valve bodies for water infrastructure
Reference guide to the iron casting grades we routinely produce. Custom alloy formulations and heat treatment conditions available on request.
| Grade | Standard | Tensile Strength (MPa) | Hardness (BHN) | Elongation (%) | Typical Applications |
|---|---|---|---|---|---|
| Grey Iron FG 150 | IS 210 | 150 min | 149–197 | — | Low-stress housings, covers, counterweights |
| Grey Iron FG 200 | IS 210 | 200 min | 163–217 | — | Machine beds, pump casings, pipe fittings |
| Grey Iron FG 260 | IS 210 | 260 min | 180–230 | — | Engine cylinder blocks, brake drums, flywheels |
| Grey Iron FG 300 | IS 210 | 300 min | 197–255 | — | High-strength hydraulic and automotive parts |
| Grey Iron FG 350 | IS 210 | 350 min | 207–269 | — | Heavy-duty diesel engine components |
| SG Iron SG 400/15 | IS 1865 | 400 min | 130–180 | 15 min | Pipe fittings, water valve bodies, brackets |
| SG Iron SG 500/7 | IS 1865 | 500 min | 170–230 | 7 min | Crankshafts, camshafts, axle housings |
| SG Iron SG 600/3 | IS 1865 | 600 min | 192–270 | 3 min | Gears, suspension arms, diff cases |
| SG Iron SG 700/2 | IS 1865 | 700 min | 225–305 | 2 min | High-load structural and machinery components |
Properties shown are minimum values per respective standard. Actual values depend on section thickness, heat and process parameters. Contact us for specific grade data sheets.
At Audhe Industries, quality is not an afterthought. Our foundry operates a quality management system aligned with ISO requirements at every process gate — from raw-material incoming inspection to final shipment verification.
On-line optical emission spectrometer confirms iron chemistry before every pour — no casting begins until chemistry is within specification.
Co-ordinate measuring machine and precision gauging verifies all critical dimensions against customer drawings on first article and statistical sampling in production.
Dye penetrant (PT) and magnetic particle (MT) testing detects surface and near-surface defects. UT and radiography available for safety-critical castings.
Every batch carries a unique heat number linked to spectro report, hardness records, dimension inspection report and packing list for complete traceability.
Choosing the right iron casting supplier affects your quality, cost and supply reliability for years. Here is what sets us apart from the competition.
Over a decade and a half of hands-on experience producing grey and ductile iron castings for demanding domestic and international clients. We have seen and solved nearly every casting challenge.
Our induction furnace technology gives us precise control over melt temperature and chemistry — a critical advantage over cupola-based foundries for consistency and repeatability.
Our internal tool room means faster first-article timelines, lower tooling costs and complete pattern-change control — no dependency on external vendors for new product introduction.
Castings requiring precision machined surfaces, bores or threaded features are finished in our on-site CNC machine shop — giving you a single-vendor supply chain and better dimensional control.
We have been exporting iron castings for over a decade. Our team manages shipping, customs documentation, international quality standards (ASTM, EN, DIN, JIS) and LC/TT payment terms routinely.
Our quality procedures, inspection records, corrective action process and supplier qualifications are aligned to ISO quality standards — providing the audit trail global buyers require.
Have a question not listed here? Call us on +91 422 417 2126 or email enquiry@audhe.com and our technical team will respond within 24 hours.
Send us your drawings, specifications or samples. Our technical team will respond within 24 hours with a competitive quote, material recommendation and lead time.