Dried foundry chrome sand AFS45-55

【Product Name】: Chrome sand /Chromite sand

【Other Names】: foundry chromite sand, Cr-Sand, Chrome ore sand, Chromite AFS45/55,Arena de cromita AFS45-55,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 AFS45-50,sable de chromite,KROMİT KUMU,Cromita refratária,Areia de minério de ferro cromado,Areia cromada,Sabbia di Cromite,Chromerzsand,Хромитовый песок,Хромит песок,Песок хромитовый, Песок хромитовый AFS 45-55, クロマイトサンド,クロマイト砂,クロム鉱石砂,Песок хромита AFS45-50，크롬모래,크롬샌드,주조모래, 크롬샌드 주조모래

Dried foundry chrome sand AFS45-55 is an special casting sand for manganese steel, ductil iron, carbon steel,etc. The refractoriness of foundry chrome sand is 1850 degree. The excellent slag resistance, low thermal expansion and high thermal conductivity make it performs superb particularly for large size, high weight castings.

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 Dried foundry chrome sand 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 Dried foundry chrome sand AFS45-55:

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 chromite sand:

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.