Grades Of Silicon Metal
Silicon metal is rich in silicon and is widely used in industries such as steelmaking, foundry casting, aluminum ingot production, and refining. Different grades of silicon metal contain different amounts of silicon and have widely differing applications. The main common grades of silicon metal are 441, 553, 3303, and 2202, but in addition to these grades there are also lesser known grades such as 421, 411, and 1101.
List of Silicon Metal Grades
| Grades | Specifications | |||
| Chemical composition(%) | ||||
| Si | Fe | Al | Ca | |
| Min | Max | |||
| Silicon Metal 553 | 98.5 | 0.5 | 0.5 | 0.3 |
| Silicon Metal 441 | 99.0 | 0.4 | 0.4 | 0.1 |
| Silicon Metal 421 | 99.0 | 0.4 | 0.2 | 0.1 |
| Silicon Metal 3303 | 99.0 | 0.3 | 0.3 | 0.03 |
| Silicon Metal 2202 | 99.0 | 0.2 | 0.2 | 0.02 |
| Silicon Metal 1101 | 99.0 | 0.1 | 0.1 | 0.01 |
| Off grade silicon | 96.0 | 2.0 | 1.0 | 0.5 |
| Size:1-10mm, 3-8mm, 10-50mm, 10-100mm, 200 mesh, 325 mesh, | ||||
Many people assume that silicon metal grades are graded based on silicon content, like ferro silicon, but this is not the case. Silicon metal 2202 contains 0.2% ferro silicon, 0.2% aluminum, and 0.02% calcium. Grades of silicon metal used in steelmaking are generally 411, 441, 421, and 553, while grades of silicon metal used in aluminum ingots and refining processes are relatively high, generally 3303 and 2202.
Processing the grain size of silicon metal produces silicon metal powder and silicon metal pellets. Silicon metal powder is usually packaged in steel drums, aluminum foil, or paper bags, while silicon metal lumps are usually packaged in ton bags, but other packaging can be changed according to user requirements.
