Chromite sand AFS42-58 Cr-Sand casting refractory material
【Product Name】: Chromite sand
【Other Names】: Cr-Sand, Chrome ore sand, foundry chromite sand, Arena de cromita AFS42/58,La arena de cromita,Arena cromita,cromite,Fundición cromita,refractarios de cromita,cromita refractaria,Areia de Cromita,cromita preço,Areia de Cromita,Chromite sand, Cr-sand AFS42/58,sable de chromite,KROMİT KUMU,Cromita refratária,Areia de minério de ferro cromado,Areia cromada,Sabbia di Cromite,Chromerzsand
Chromite sand AFS42-58 Cr-Sand is casting refractory material with a low thermal expansion coefficient, high refractory temperature, strong resistance to molten steel erosion, and excellent thermal conductivity. When pouring carbon steel, stainless steel, ductile cast iron, manganese steel and other materials, it can accelerate cooling and will not chemically react with molten steel and impurities. Therefore, Cr-sand can prevent defects such as pores, sand inclusions, and sand adhesion in castings and improve the quality of castings. Applicable casting processes include furan resin self-hardening sand, water glass resin sand, alkali phenolic resin coated sand, coated sand shell molds and cores.
Chromite sand AFS42-58 Cr-Sand casting refractory material Characteristics:
- High melting point, high sintering temperature
- Excellent thermal stability
- High density, high density –
- Medium Mohs hardness 5.5
- Strong thermal conductivity
- Low coefficient of thermal expansion
Technical Index of Chromite sand AFS42-58 Cr-Sand casting refractory material:
- Chemicals
| Content | Guarantee Value | Typical Value |
| Cr2O3 | ≥ 46% | 46.70 |
| SiO2 | ≤ 1.0% | 0.61 |
| FeO | ≤ 26.5% | 26.2 |
| Cr:Fe | ≥1.5:1 | 1.55 |
| MgO | ≤ 10% | 9.8 |
| CaO | ≤ 0.3% | 0.3 |
| Al2O3 | ≤ 15.5% | 15.4 |
| P | ≤30 ppm | 28 ppm |
| S | ≤30 ppm | 27 ppm |
- Physical index:
| Mohs Hardness | 5.5-6 |
| Melting Point | 2180 ℃ |
| Sintering Point | ＞1800℃ |
| Specific Gravity | 4.0-4.8 g/cm3 |
| Bulk Density (LPD) | 2.5-3 g/cm3 |
| Color | Black |
| PH Value | 7-9 |
| Thermal conductivity | 0.63 W/M·K |
| Thermal Expansion Rate（1000℃） | 0.6% |
| Acid Demand Value (ADV) | PH3:≤ 3ML PH4: ≤ 2ML PH5: ≤ 2ML |
| Turbidity(NTU) | ≤ 200 |
| Soil content | ≤0.1% |
| Moisture | ≤0.1% |
Particle distribution of Chromite sand AFS42-58 Cr-Sand casting refractory material:
| Sieve Mesh | Residue Percentage |
| +40mesh(425um) | 2.40% |
| +50mesh(300um) | 36.80% |
| +70mesh(212um) | 41.70% |
| +100mesh(150um) | 13.70% |
| +140mesh(106um) | 3.20% |
| Grain Fineness(GFN) | AFS 50.184 |
Applications of Chromite sand AFS42-58 Cr-Sand casting refractory material:
- Large scale thick walled casting: Chromite sand combined with sand casting, furan resin self hardening sand, water glass self hardening sand and other processes are used for large volume and weight cast iron and steel castings. It can cool the castings in a predetermined order, which is conducive to improving the internal tightness of the castings and enhancing their strength. In addition, for the process of using silica sand, chromite ore sand can be used as surface sand instead of silica sand in key areas where porosity and veins are prone to occur, which can effectively prevent casting defects such as cracks and porosity.
- Lost foam casting. In lost foam casting, using chrome ore sand can prevent defects such as sand inclusion and sticking caused by quartz sand casting. Used for manufacturing castings such as valves and impellers made of high chromium cast steel and high manganese steel materials.
- Shell casting: Chromite sand can be used as a core sand material for complex components in shell casting, making sand cores. Used for producing high-precision, smooth surface 304316 stainless steel castings and carbon steel precision castings. It can effectively prevent the problem of sand sticking in the inner cavity of castings.
- Sand casting: Chromite sand can also be used for sand casting, such as sand casting, water glass self hardening sand casting, etc., to produce various large, medium, and small parts, such as pump bodies, pipelines, valves, etc.
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