Chromium Silicon (SiCr), also known as Ferro Silicon Chromium, is an iron-based alloy composed primarily of chromium (Cr), silicon (Si), and iron (Fe). It plays a critical role in the electric silicon thermal method for producing medium, low, and micro-carbon ferrochromium, serving as an essential intermediate alloy in the steel industry.
Silicon Chromium Composition and Classification
| Grade | Chemical Component(%) | |||||
| Si | Cr | C | P | S | ||
| I | Ⅱ | |||||
| ≥ | ≤ | |||||
| FeCr30Si40-A | 40.0 | 30.0 | 0.02 | 0.02 | 0.04 | 0.01 |
| FeCr30Si40-B | 40.0 | 30.0 | 0.04 | 0.02 | 0.04 | 0.01 |
| FeCr30Si40-C | 40.0 | 30.0 | 0.06 | 0.02 | 0.04 | 0.01 |
| FeCr30Si40-D | 40.0 | 30.0 | 0.10 | 0.02 | 0.04 | 0.01 |
| FeCr32Si35 | 35.0 | 32.0 | 1.0 | 0.02 | 0.04 | 0.01 |
Advantages of Silicon Chromium
1. Efficient Deoxidizing Agent
Silicon Chromium is an excellent deoxidizer in steelmaking, capable of replacing traditional deoxidizers like ferrosilicon, reducing oxygen content effectively.
2. Low Carbon Addition
Ideal for producing low-carbon and ultra-low-carbon steels, as it introduces chromium without significantly increasing carbon content.
3. Improved Steel Properties
Enhances hardness, strength, and corrosion resistance of finished steel products due to its dual role as a chromium and silicon additive.
4. Stable Alloying Behavior
Offers good thermal and chemical stability during steelmaking, ensuring uniform composition and reliable performance.
5. Cost-Effective
Compared to pure chromium alloys, Silicon Chromium provides a more economical way to add chromium and silicon simultaneously.
Production Process of Silicon Chromium
1. Raw Material Selection
The main raw materials include chromite ore, silica (quartz), and carbonaceous reducing agents like coke or coal.
2. Electric Furnace Smelting
The mixture is charged into a submerged arc furnace, where high temperatures (up to 1600–1800℃) trigger a reduction reaction.
Silicon is formed from silica and carbon.
Chromium is reduced from chromite.
These elements combine to form the SiCr alloy.
3. Refining and Casting
After smelting, the molten alloy is tapped, refined to remove impurities, and cast into ingots or crushed into lumps according to user requirements.
4. Grading and Packaging
Products are classified by chemical composition (Cr, Si and C content) and size, then packaged for delivery.
Applications of Silicon Chromium
Steelmaking and Refining
Acts as a powerful deoxidizer and alloying agent, replacing part of ferrosilicon and ferrochromium in steel production to improve steel purity and strength.
Stainless Steel Manufacturing
Adds chromium and silicon to enhance corrosion resistance and oxidation resistance in stainless steel grades.
High-Temperature Alloy Production
Used in heat-resistant and high-strength steels that operate under extreme conditions, such as in turbines and industrial furnaces.
Vacuum Melting and Special Steel
Low-carbon Silicon Chromium is ideal for vacuum induction melting (VIM) and electroslag remelting (ESR), producing high-purity steels for aerospace and precision applications.
HS Ferroalloy – Your Reliable Partner for Silicon Chromium Alloy
At Hongshun Ferroalloy, we specialize in the supply of high-quality Silicon Chromium (SiCr) alloy, tailored to meet the diverse needs of the steel and foundry industries. Our products are available in both standard grades and customized specifications, ensuring superior performance across a wide range of applications.
With a strong focus on product consistency, competitive pricing, and customer satisfaction, we are committed to helping you achieve optimal results in your production processes. Whether you're looking for reliable deoxidation agents or high-purity alloy additives, HS Ferroalloy is your trusted source.
Contact us today to request a quote or learn more about our Silicon Chromium alloy solutions.
