Cr Sand for foundry with 46% Cr2O3 & Low silica
Cr Sand for foundry with 46% Cr2O3 & Low silica is a high-quality foundry sand made primarily from chromite. It is chemically stable, has high refractoriness, and can effectively withstand the erosion of molten metal at high temperatures. Cr Sand for foundry possesses excellent thermal conductivity, a low coefficient of thermal expansion, and good permeability. It can significantly improve the surface finish of castings and reduce casting defects such as porosity and sand inclusions. Due to its good heat retention and anti-sticking properties, it is widely used as molding sand, core sand, and surface sand for cast steel, gray cast iron, ductile iron, and large precision castings.
【Product Name】: Cr Sand for foundry
【Other Names】: Cr-Sand for foundry, Arena Cromita, Arena de cromita, mineral de cromita, Fundición cromita, Arena cromita AFS45-50, Arena de cromita AFS 45-55, Arena de cromita AFS 42-58
Cr Sand for foundry with 46% Cr2O3 & Low silica 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 Cr Sand for foundry with 46% Cr2O3 & Low silica:
- 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 Cr Sand for foundry with 46% Cr2O3 & Low silica:
| 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 Cr Sand for foundry with 46% Cr2O3 & Low silica:
- 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.
Production Process:
Package:
Latest News:
What are the advantage of foundry chromite sand for Gray iron and ductile iron？
