BY 
GENN
2025/09
News
What is the difference between Ferrosilicon 65 and Ferrosilicon 75?
Ferrosilicon 65 vs. Ferrosilicon 75
When producing steel and working with molten metal, selecting the appropriate grade of ferrosilicon can significantly impact the efficiency of the process, its cost, and the quality of the end product. Ferrosilicon 65 (FeSi65) and Ferrosilicon 75 (FeSi75) have different applications in metallurgy, but the differences between them are not widely understood. ZHEN AN INTERNATIONAL CO., LIMITED (ZhenAn) produces alloys that meet exacting standards. We also have a reliable supply chain.
| Parameter | Ferrosilicon 65 (FeSi65) | Ferrosilicon 75 (FeSi75) |
| Silicon Content | 63-68% Si (Typically 65%) | 72-80% Si (Typically 75%) |
| Iron Content | ~32-35% Fe | ~22-25% Fe |
| Density | Higher (5.1-5.5 g/cm³) | Lower (2.8-3.2 g/cm³) |
| Primary Function | Cast Iron Inoculant | Steel Deoxidizer |
| (Promotes graphite formation) | (Removes oxygen, prevents porosity) | |
| Key Applications | • Gray & ductile iron foundries | • Carbon/alloy steel production |
| • Low-silicon steel additives | • Magnesium manufacturing (Pidgeon process) | |
| • High-silicon steel alloys | ||
| Impurity Tolerance | Higher Al/Ca acceptable | Strict low-Al/Ca requirements |
| Reaction Speed | Slower dissolution | Faster deoxidation |
Applications
| Your Industry | Recommended Grade | ZhenAn’s Value |
| Steelmaking (BOS/EAF) | FeSi75 (Deoxidation) | Ultra-low Al (<1.5%) variants |
| Foundry (Ductile Iron) | FeSi65 (Inoculation) | Controlled 1-3% Ca/Mg content |
| Mg Production | FeSi75 (75% min Si) | Consistent 75-78% Si batches |
Why Global Buyers Trust ZhenAn for Both FeSi65 & FeSi75
1. 𝗙𝗮𝗰𝘁𝗼𝗿𝘆 𝗗𝗶𝗿𝗲𝗰𝘁 𝗘𝘅𝗰𝗲𝗹𝗹𝗲𝗻𝗰𝗲
• Eliminate trader markups with direct-from-smelter pricing
• Access free samples, technical manuals, lab reports (incl. Al/Ca analysis), and market insights
2. 𝗥𝗲𝗮𝗱𝘆 𝗦𝘁𝗼𝗰𝗸 & 𝗖𝘂𝘀𝘁𝗼𝗺𝗶𝘇𝗮𝘁𝗶𝗼𝗻
• Ship FeSi65/FeSi75 within 24 hours from our 10,000+ ton inventory
• Tailor size (0-3mm, 10-50mm, etc.), composition, or low-Al/Ca variants to your process
3. 𝗤𝘂𝗮𝗱𝗿𝘂𝗽𝗹𝗲 𝗤𝘂𝗮𝗹𝗶𝘁𝘆 𝗔𝘀𝘀𝘂𝗿𝗮𝗻𝗰𝗲
Every batch undergoes:
① Raw Material Spectrometry
② Molten Metal Chemistry Analysis
③ Granulometry & Physical Testing
④ Pre-Shipment Chemical Verification
Ensuring precise Si content and impurity control
4. 𝗔𝗱𝘃𝗮𝗻𝗰𝗲𝗱 𝗣𝗮𝗰𝗸𝗮𝗴𝗶𝗻𝗴 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀
• Triple-layer protection: 10kg/25kg waterproof bags → 1MT jumbo bags → moisture-proof lining
• Custom packaging (bulk bags, drums, etc.) for safe ocean/land transit
5. D𝗲𝗱𝗶𝗰𝗮𝘁𝗲𝗱 𝗢𝗿𝗱𝗲𝗿 𝗖𝗼𝗻𝗰𝗶𝗲𝗿𝗴𝗲
• Personal manager for real-time production/shipping updates
6. 2𝟰-𝗛𝗼𝘂𝗿 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗦𝘂𝗽𝗽𝗼𝗿𝘁
• Rapid response to quality certificates, SDS, or metallurgical queries
