Foundry Material Chromite Sand AFS 40-50 AFS 50-55 Price for Ductile Iron Casting
Chrome ore sand AFS 45-55 is a non
siliceous casting surface sand and molding sand. The main component of chromite
sand AFS 45-55 is natural chromite, accompanied by iron oxide and aluminum
oxide. After water washing and four rounds of magnetic separation, the chrome
ore sand manufacturer will control the content of silicon dioxide and sediment
to make it more suitable for the casting field. Chromium sand used in casting
has the characteristics of high sintering temperature, prevention of chemical penetration,
excellent thermal conductivity, and small thermal expansion when encountering
heat. Chromite sand AFS 45/55 (50-100mesh) is mainly used for surface sand of
large thick wall castings, core sand of easily sticky sand parts of castings,
and alloy steel castings with high pouring temperature. In terms of molding
sand and other aspects of the product.
Foundry Material Chromite Sand AFS 40-50 AFS 50-55 Price for Ductile Iron Casting Characteristics:
1. High
melting point, high sintering temperature
2. Excellent
thermal stability
3. High
density, high density
4. Medium Mohs
hardness 5.5
5. Strong
thermal conductivity
6. Low coefficient
of thermal expansion
Technical
Index of Foundry Material Chromite Sand AFS 40-50 AFS 50-55 Price for Ductile Iron Casting:
a)
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
|
b)
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 Foundry Material Chromite Sand AFS 40-50 AFS 50-55 Price for Ductile Iron Casting:
|
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 Foundry Chrome Ore Sand/Chromite Sand for Sale From China:

1. 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.
2. 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.
3. 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.
4. 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.


