High-RefractorinessFoundryGradeSilicaSand(AFS25to65)
Engineered with sub-angular crystalline quartz grains, continuous rotary kiln drying (0.15%–0.25% moisture), deslimed clay (<0.18% max), and 0.00% PAN fines (certified spec). High refractoriness >1,650°C and neutral ADV < 2.5–3.0 mL help reduce chemical binder consumption by approx. 15%–20% across green sand and cold-box core lines.
WhyFoundriesChooseGujaratMineralsSand
Mould and core stability directly dictate scrap rates and surface finish. Our sand is processed to reduce the primary causes of casting defects.
Thermal Refractoriness (>1,650°C)
Purity of >99.20% SiO₂ withstands ductile iron and steel pours with high sintering resistance, reducing metal burn-on risk and simplifying fettling operations.
Resin Binder Efficiency
Deslimed clay content (<0.18% max) and neutral ADV (<2.5–3.0 mL) can reduce chemical binder consumption by approx. 15%–20%, depending on process conditions.
Rotary Kiln Moisture (0.15%–0.25%)
Controlled kiln drying reduces moisture-related gas defects and improves process consistency while eliminating paid water freight in transit.
AFS Grain Fineness & Sieve Grade Recommender
Select your casting process below to see the recommended AFS fineness number, mesh fractions, and technical rationale.
Foundry Grade FD-35 (AFS 30 – 35)
Balanced grain geometry maximizes green compression strength. Low ADV (<3.0 mL) can reduce resin binder consumption by approximately 15%–20%, depending on process conditions.
FoundrySandStandardProductionBenchmarks
High-purity raw silica sand calibrated for shell moulding, no-bake furan systems, and green sand moulding lines.
| Grade Name | AFS Fineness | Mesh Equivalent | SiO₂ % | Clay % | Moisture % | Target Application |
|---|---|---|---|---|---|---|
| Foundry Grade FD-28 | AFS 25 - 28 | 20 / 40 Mesh | > 99.10% | < 0.18% | 0.18% | Heavy Steel Castings, Large Grey Iron Moulds, Ingot Moulds |
| Foundry Grade FD-35 | AFS 30 - 35 | 30 / 60 Mesh | > 99.15% | < 0.18% | 0.20% | Ductile/SG Iron, Automotive Castings, High-Pressure Valve Bodies |
| Foundry Grade FD-42 | AFS 40 - 45 | 40 / 70 Mesh | > 99.20% | < 0.18% | 0.21% | Automotive Castings, Shell Moulding, Green Sand |
| Foundry Grade FD-52 | AFS 50 - 55 | 50 / 100 Mesh | > 99.25% | < 0.18% | 0.21% | Cold-Box / Hot-Box Core Shooters, Pump Casings |
| Foundry Grade FD-62 | AFS 60 - 65 | 60 / 140 Mesh | > 99.30% | < 0.18% | 0.19% | RCS (Resin Coated Sand), Investment Casting |
Foundry Grade FD-28
Mesh: 20 / 40 MeshApplication: Heavy Steel Castings, Large Grey Iron Moulds, Ingot Moulds
Foundry Grade FD-35
Mesh: 30 / 60 MeshApplication: Ductile/SG Iron, Automotive Castings, High-Pressure Valve Bodies
Foundry Grade FD-42
Mesh: 40 / 70 MeshApplication: Automotive Castings, Shell Moulding, Green Sand
Foundry Grade FD-52
Mesh: 50 / 100 MeshApplication: Cold-Box / Hot-Box Core Shooters, Pump Casings
Foundry Grade FD-62
Mesh: 60 / 140 MeshApplication: RCS (Resin Coated Sand), Investment Casting
Certified Laboratory Test Series (6 Foundry Batches)
Actual production batch assay results documented in our official quality dossier. All six are certified pass batches verified by laboratory sieve titration.
NeedaCustomAFSDistributionforYourFoundryCoreShop?
Our quality laboratory can match your existing plant sieve distribution. Complimentary 2 KG calibration sample box dispatched with physical COA upon request.