Low-Silicon Iron Powder: New Arrival
Dec 09, 2025
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I. 45# Atomized Ferrosilicon Powder
Product Grade: FeSi45
Application: Serves as an auxiliary material in the flux coating of special welding electrodes within the welding materials sector.
Manufacturing Process: Electric furnace smelting / Crushing / Sieving
Form: Powder
Chemical Composition: Si: 43-47%, Mn: ≤0.70%, C: ≤0.10%, S: ≤0.02%, P: ≤0.04%
II. 75# Atomized Ferrosilicon Powder
Product Grade: FeSi75
Application: Functions as an auxiliary material in the flux coating of special welding electrodes within the welding materials field.
Manufacturing Process: Electric furnace smelting / Crushing / Sieving
Form: Powder
Chemical Composition: Si: 72-75%, Mn: ≤0.70%, C: ≤0.10%, S: ≤0.02%, P: ≤0.04%
III. Differences Between the Two Products
1.Core Composition Variation: The fundamental difference between 45# Atomized Ferrosilicon Powder and 75# Atomized Ferrosilicon Powder lies in their silicon content. 45# Atomized Ferrosilicon Powder has a silicon content of only 43%-47%, with a relatively higher iron content, making it a low-silicon grade atomized ferrosilicon powder. In contrast, 75# Atomized Ferrosilicon Powder boasts a silicon content of 72%-75%, where the proportion of silicon is significantly higher than that of the 45# grade, and the iron content is correspondingly lower, classifying it as a medium-to-high silicon grade atomized ferrosilicon powder.
2.Critical Performance Differences: The two products share basically the same physical specifications such as particle size and packaging. Both offer multiple particle size options (e.g., 40 mesh, 50 mesh) and have an identical apparent density of 2.5g/cm³. However, their core performance, particularly deoxidation capacity, differs remarkably due to the variation in silicon content.
|
Performance Indicator |
45# Atomized Ferrosilicon Powder |
75# Atomized Ferrosilicon Powder |
|
Deoxidation Capacity |
Relatively weak. As the core deoxidizing element, the low silicon content limits its ability to combine with oxygen during welding or metallurgical processes. |
Significantly stronger. The high silicon content enables rapid reaction with oxygen in welding or metallurgical environments, achieving a more thorough deoxidation effect and effectively minimizing oxygen-induced defects on product quality. |
|
Alloying Effect |
Moderately supplements silicon in welded workpieces or metallurgical products without causing significant changes to the silicon content of the base material. |
Exhibits a prominent alloying effect. It can rapidly increase the silicon content in products, facilitating precise regulation of material properties such as hardness and wear resistance. |
3. Differences in Application Scenarios
Although both products can be used as auxiliary materials in the flux coating of welding electrodes, their segmented application directions and adaptive requirements vary based on performance disparities.
·45# Atomized Ferrosilicon Powder: Suitable for scenarios with moderate deoxidation requirements and the need to control silicon addition. Typical applications include serving as an auxiliary material in the flux coating of ordinary carbon steel electrodes-it not only meets basic deoxidation needs but also avoids reduced toughness of weld metal caused by excessive silicon content. Additionally, it is applicable in simple welding processes where the requirement for alloy composition accuracy is not stringent.
·75# Atomized Ferrosilicon Powder: In addition to being adapted for the production of flux coatings for special welding electrodes requiring high deoxidation efficiency, it can also be used in metallurgical scenarios with specific alloying demands. For instance, in the smelting of certain alloy steels, it not only exerts an efficient deoxidation effect but also synchronously achieves silicon alloying supplementation. Meanwhile, it is suitable for precision welding fields with strict quality requirements, where it helps reduce defects such as porosity and slag inclusion.
