Chromite sand AFS50-55 for foundry
Product Introduction of Chromite sand AFS50-55 for Foundry
Chromite sand AFS50-55 for foundry is a natural casting sand. It is suitable for steel casting, iron casting, etc. Chromite sand can conduct heat quickly. It makes thick wall castings solidify from bottom to top. Thus, it can avoid the deformation of casting. The best chromite sand for foundry is from a good quality mine in South Africa. The Cr2O3 purity of SA chrome ore is min 46%. Compared with refractory grade chromite sand, the foundry chromite sand should be high Cr2O3 content and good particle distribution. Foundry chromite sand will help foundries to get a smooth finish surface of steel castings.
Typical chemical analysis of Chromite sand AFS50-55 for foundry:
| CHEMICAL COMPOSITION | |
| Cr2O3 | 46.5% |
| SiO2 | 0.4% |
| FeO | 26.3% |
| CaO | 0.2% |
| MgO | 9.8% |
| AL2O3 | 15.2% |
| P | 0.001% |
| S | 0.001% |
| Moisture (105°C) | 0.01% |
| Cr/Fe | 1.55:1 |
Typical physical properties of Chromite sand AFS50-55 for foundry:
| Hardness: | Mohs:5.5-6 |
| Melting Point: | Sublimes at 2180 °C |
| Sintering point: | >1800°C |
| Specific Gravity: | 4.0-4.8 g/cm3 |
| Bulk density(LPD): | 2.5-3 g/cm3 |
| Turbidity (JTU) | 110 |
| Color: | Black |
| PH Value | 7.3 |
| Percentage of free acid present in the sand: | 0% |
| The amount of the acid: | ≤2ML |
| Percentage of soil: | ≤0.1 |
| Percentage of Moisture: | ≤0.1 |
Typical particle size distribution of Chromite sand AFS50-55 for foundry:
| MESH | VALUE |
| +40mesh（425um） | 3.0% |
| +50mesh（300um） | 25.0% |
| +70mesh（212um） | 45.0% |
| +100mesh（150um） | 22.0% |
| -100mesh（150um） | 5.0% |
| AFS | 53.80 |
Product Feature and Applications of Chromite sand AFS50-55 for foundry:
- Good resistance to alkaline slag and does not react with iron oxide.
In practical applications, chrome ore can avoid thermal chemical sand sticking on the surface of the casting. Thus it will save costs on further surface finish work.
- High Wetting angle to molten steel liquid.
That makes good wettability resistance to steel liquid. Chromite sand won’t get react with molten steel. There won’t be chemical sand sticking for casting steels.
- High thermal conductivity and thermal storage coefficient
It is several times greater than that of silica sand. That property of chromite sand can
increase the cooling speed of melted steel liquid. On one hand, it prevents a chemical reaction at high temperatures. So casting will get off from the shell. It is easier to clean the casting surface.
On the other hand, it also increases the solidification process of molten steel. It will make less shrinkage and porosity of steel castings.
- High refractoriness
The resistance to high temperatures will help chromite sand stable to molten steel.
- Low thermal expansion.
That property of foundry chromite sand will help to decrease the unshaped defects on castings.
- Even particle sieve distribution. The chromite sand grit size is getting strictly according to AFS standards. By multi-cleaning process, the chromite sand from us is with low turbidity. That will make the consistency of chromite quality.
- Low SiO2 content. It will help to prevent heavy leather defects on castings.
Applications of Chromite sand AFS50-55 for foundry:
Investment casting.
Shell molding for precise casting such as water glass shell molding.
Lost foam casting.
Sand casting.
Resin-coated casting.
Production details of Chromite sand AFS50-55 for foundry:
Packing of Chromite sand AFS50-55 for foundry:
FAQ:
Q: Where are you located?
A: Our chromite sand factory is located in a tariff-free Zone at Lianyungang Port. So it will be convenient to export.
Q: What is your main market?
A: Our main market is local China and Asia-Pacific regions.
Q: What is the difference between your chromite sand and Original South Africa Chromite sand?
A: In our factory, we take production processes on original South Africa such as washing, magnetic removing, and sieving. So it is cleaner with fewer impurities, less magnetic content. The cleanness of chromite from us is just proper for the foundry industry. In the meantime, we will get a precise AFS size and make customized particle size distribution to the requirement.
Q: Do you have a limit of MOQ?
A: No. We don’t have a limit of MOQ, but for a small quantity, the transportation cost would be high.
Q: Can you provide free samples?
A: Yes, free samples within 25 kgs are available. You only have to bear the express cost.
Q: What is the delivery time for one container?
A: Generally the lead time of FCL is 7-10 days. A bigger quantity will get a longer delivery time.
Q: What is the HS code of Chromite sand?
A: The chromite sand HS code is 2610000000.
Q: Do you get MSDS of chromite sand?
A: Yes. You could download it from our website or get it from our sales team.
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