Metal foundry sand Chromite sand AFS45-50/AFS45-55
【Product Name】: Metal foundry sand/Metal foundry chromite sand, La arena de cromita, Arena de fundición cromita, Arena para fundición de metales Arena de cromita
Metal foundry sand Chromite sand AFS45-50/AFS45-55 is a specialized foundry sand processed from natural chromite ore, suitable for casting iron, ductile iron, gray cast iron, stainless steel, manganese steel, and alloy cast steel. It possesses an ultra-low coefficient of thermal expansion and extremely strong resistance to chemical adhesion, preventing leakage and veining on the casting surface even under high-temperature pouring. Chromite sand for steel casting has high thermal conductivity, which facilitates the sequential solidification of molten cast iron, thereby improving the mechanical strength of the castings. Chromite sand is chemically inert to molten stainless steel, alloy steel, and copper, ensuring stable dimensional accuracy of castings. Chromite sand can be used as surface sand and molding sand in steel casting and is widely used in foundry machinery, crusher liners, large cast iron parts, mining equipment, and other fields.
Dried foundry chrome sand AFS45-55 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 Metal foundry sand Chromite sand AFS45-50/AFS45-55:
- 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 Metal foundry sand Chromite sand AFS45-50/AFS45-55:
| Mesh# | Mesh size(um) | Typical Value(%) |
| +40 | 425 | 19.5 |
| +50 | 300 | 42.6 |
| +70 | 212 | 21.2 |
| +100 | 150 | 13.4 |
| -100 | 150 | 3.3 |
| AFS Fineness | 46.2 | |
Applications of Metal foundry sand Chromite sand AFS45-50/AFS45-55:
- 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:
FQA:
Q： Where is the chromite sand for metal & Inox casting orginally from？
A: The chromite foundry sand we supply is originally from South Africa
Q: What is chromite foundry sand refractoriness?
A: Chromite sand can resist high temperature above 1850 degree.
Q: What is the bulk density of chromite foundry sand?
A: Bulk density of chromite fondry sand is above 2.55g/cm3. The specific gravity is about 4.5g/cm3.
Q: What is the PH Value of chromite foundry sand?
A: PH of metal casting chromite sand is 7-9 which is alkaline materials.
