Calcium Silicon Cored Wire, commonly abbreviated as CaSi Cored Wire, is a high-performance alloy cored wire widely applied in the steelmaking industry. It is produced by filling high-purity calcium silicon alloy powder into a steel strip, which is then processed and formed by a professional cored wire machine. As a key out-of-furnace refining material, this wire is developed based on jet metallurgy technology, providing a more efficient and stable alternative to the traditional bulk alloy direct feeding method and alloy powder spraying method that were once prevalent in alloy production.
As an efficient deoxidizer, calcium silicon cored wire has a strong affinity for oxygen. During the diffusion deoxidation process, it reacts with oxygen in molten steel to form composite products composed of metal oxides and non-metal oxides. These composites have good fluidity and floatability, making them easy to separate from molten steel and discharge, thus greatly improving the purity of molten steel. This advantage has made calcium silicon cored wire the preferred choice for most steel refining enterprises in modern steelmaking.
CaSi Cored Wire Specifications
| Type | Main Composition | Inside Powder Weight (g/m) | Steel Strip Thickness (mm) | Cored Wire Diameter (mm) |
| CaSi | Si: 55-65, Ca: 28-35 | 230 | 0.4±0.05 | 13-13.5 |
| CaSi (Customized) | Si: 55-65, Ca: 24-31 | 220-240 | 0.35-0.45 | 12-14 |
Wire Feeding Method for Calcium Silicon Cored Wire
The wire feeding method is a mainstream application method for calcium silicon cored wire in modern steelmaking. It refers to feeding the cored wire into the ladle with a wire feeder after molten steel is tapped from the steelmaking furnace. According to different refining purposes, the wire feeding method can be divided into deoxidation wire feeding, desulfurization wire feeding, inclusion control wire feeding and alloying wire feeding, among which calcium silicon cored wire is mainly used for deoxidation and inclusion control.
The feeding equipment of calcium silicon cored wire has the characteristics of simple structure, convenient operation, small floor area and low investment. During operation, it has no smoke, low processing cost, small molten steel temperature drop and high alloy absorption rate, which effectively solves the problems of serious molten steel splashing and gas inhalation caused by traditional feeding methods.
Advantages of Calcium Silicon Cored Wire
Compared with traditional refining materials and feeding methods, calcium silicon cored wire has obvious advantages in practical application:
It minimizes the agitation of molten steel during the feeding process, which is much smaller than that of bulk alloy feeding and powder spraying methods, effectively reducing molten steel splashing and gas inhalation, and ensuring the stability of the refining process.
It can significantly reduce the temperature loss of molten steel, controlling the temperature loss at 5-7℃/min, which is 3-6 times lower than that of traditional methods, reducing energy consumption and ensuring the quality of molten steel.
By selecting calcium silicon cored wires with different silicon-calcium ratios, the chemical composition of molten steel can be precisely adjusted to meet the production requirements of different grades of steel.
According to the content of aluminum and sulfur in molten steel, adding an appropriate amount of calcium silicon cored wire can effectively improve the shape of inclusions, transform high-melting inclusions into low-melting ones, and further improve the mechanical properties of steel products.
The wire feeding method of calcium silicon cored wire can reduce the investment cost and operating cost of enterprises, and the alloy absorption rate is high, which helps to improve production efficiency and reduce production waste.
2026 Calcium Silicon Cored Wire Industry News
With the global steel industry moving towards high-end, green and intelligent transformation, the calcium silicon cored wire industry is also facing new development opportunities and changes. According to the latest industry report released in early 2026, the global cored wire market size is expected to grow steadily in the next decade, with calcium silicon cored wire accounting for a key share of 68% of the market segmentation.
In 2026, the application of calcium silicon cored wire in high-end special steel production has been further popularized. With the improvement of downstream enterprises’ requirements for steel purity, the demand for high-purity calcium silicon cored wire (Ca30Si60, Ca28Si60) has increased significantly. At the same time, the industry has gradually promoted the application of digital monitoring technology in the production and use of calcium silicon cored wire, which can realize real-time monitoring of wire feeding speed, powder core uniformity and other parameters, and further improve the stability of refining effect.
In terms of market prices, affected by the fluctuation of raw material prices and the adjustment of industry supply and demand, the price of calcium silicon cored wire (FOB Tianjin, ca30si60∮13mm) in March 2026 is 1680-1750 USD, which is slightly higher than the same period in 2025. The industry generally predicts that the market price will remain stable in the short term, and the long-term trend will be affected by the progress of the steel industry’s transformation and upgrading.
Current Price of CaSi Cored Wire
As of March 2026, the reference price of calcium silicon cored wire (FOB Tianjin, ca30si60∮13mm) is 1680-1750 USD. Due to factors such as raw material price fluctuations, order quantity and transportation distance, the specific price needs to be confirmed through official consultation. The price of customized specifications (different silicon-calcium ratio, diameter and powder weight) will be adjusted according to actual requirements.