Foundry Sand
Foundry sand is a silica-based quartz sand with high refractoriness (heat resistance) and a controlled particle-size distribution, used in the production of moulds and cores in the metal casting industry. It is preferred in iron, steel, aluminium, brass and bronze casting.
Foundry sand is a critical raw material that can withstand the high temperature of molten metal, accurately maintains the mould cavity and directly determines the surface quality of the final cast part. Thanks to its high SiO₂ purity and low impurity levels, it reduces the risk of sintering and sticking on the sand surface during casting.
The AFS (American Foundry Society) grain fineness number is the most important technical criterion for foundry sand. At Seyman Maden, we supply products tailored to iron, steel, aluminium and brass casting applications with 10 different fraction options in the 15-120 AFS range. The particle size determines the surface roughness of the cast part, gas permeability and mould strength.
Used in the production of green sand moulds, resin moulds (no-bake, cold-box, shell) and cores, foundry sand provides homogeneous mould performance thanks to its washed and screened structure. Its low clay and dust content optimises resin and binder consumption and reduces casting defects.
Main Applications
- Iron and steel casting
- Aluminium, brass and bronze casting
- Green sand mould systems
- Resin mould and core production (no-bake, cold-box, shell)
- Fraction options in the 15-120 AFS range
- High refractoriness and low gas emission
- Automotive, machinery and industrial foundries