High-RefractorinessFoundryGradeSilicaSand(AFS25to65)
Engineered with sub-angular crystalline grains, sub-zero moisture (~0.00%), and ultra-low clay content (<0.08%) for grey iron, ductile iron, alloy steel, and non-ferrous casting.
WhyFoundriesChooseGujaratMineralsSand
Mould and core stability directly dictate scrap rates and surface finish. Our sand is processed to resolve the primary causes of casting defects.
High Refractoriness (>1730°C)
Prevents mould burn-on and metal penetration in high-temperature steel and ductile iron pours.
Sub-Angular Grain Geometry
Optimal surface-area-to-volume ratio reduces expensive resin binder consumption while maximizing green sand permeability.
Sub-Zero Moisture (0.00%)
Rotary kiln drying eliminates blowholes, pinholes, and gas porosity defects in precision castings.
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-Medium (AFS 35 – 40)
Balanced grain geometry maximizes green compression strength while maintaining low active clay consumption.
FoundrySandStandardProductionBenchmarks
High-purity raw silica sand calibrated for shell moulding, no-bake furan systems, and green sand systems.
| Grade Name | AFS Fineness | Mesh Equivalent | SiO₂ % | Target Application |
|---|---|---|---|---|
| Foundry Grade FD-Coarse | AFS 25 - 28 | 20 / 40 Mesh | > 99.10% | Heavy Steel Castings, Large Grey Iron Moulds, Resin Coated Sand |
| Foundry Grade FD-Medium | AFS 35 - 40 | 30 / 60 Mesh | > 99.15% | Ductile Iron, Automotive Castings, Precision Valve Bodies |
| Foundry & Glass Standard | AFS 40 - 45 | 40 / 70 Mesh | > 99.20% | Non-Ferrous Alloys, Glass Containers, Shell Moulding |
| Foundry Fine & Specialty | AFS 50 - 55 | 50 / 100 Mesh | > 99.25% | Ultra-Smooth Castings, Core Shooters, Specialty Refractory Mortars |
| Micro Fine Quartz | AFS 60 - 65 | 60 / 140 Mesh | > 99.30% | Ceramic Glazes, Investment Casting, Filler Applications |
NeedaCustomAFSDistributionforYourFoundryCoreShop?
Our quality laboratory can match your existing plant sieve distribution. Free 1–2 KG sample dispatched on request.