Silicon Manganese – SiMn63-25 – High‑Carbon Alloy for Steelmaking
High‑silicon ferromanganese (25-26% Si) for efficient deoxidation, desulfurization and alloying in steel production.
| Main Composition | Mn: 63-66%, Si: 25-26%, C: ≤0.5%, P: ≤0.25%, S: ≤0.04%, Fe: Balance |
| Form | Lumps (10-60mm), Powder (0-10mm), Custom sizes available |
| Application | Steelmaking deoxidation, alloying agent, foundry industry |
| Standard | GB/T 4008-2008, ASTM A99, ISO 5445 |
Silicon Manganese 63‑25 Alloy Product Overview
Silicon Manganese 63‑25 (SiMn63‑25) is a high‑silicon ferroalloy composed primarily of manganese (63‑66%), silicon (24‑26%) and iron. It is widely used in steel production as a powerful deoxidizer and efficient alloying element. Our premium SiMn63‑25 delivers excellent performance in steelmaking, improving steel cleanliness while reducing production costs through its high silicon content.
Product Core Advantages
- Superior Deoxidation: The elevated silicon level (24‑26%) provides stronger deoxidation than standard grades, resulting in cleaner steel with minimal oxide inclusions.
- Excellent Desulfurization: Helps remove sulfur impurities, enhancing steel quality and mechanical properties.
- Alloying Efficiency: Supplies both manganese and silicon in a single addition – simplifies the steelmaking process and improves control over final chemistry.
- Cost‑Effective: Reduces overall alloy consumption and processing time compared to separate additions of ferromanganese and ferrosilicon.
- Consistent Quality: Rigorous quality control ensures uniform composition and reliable performance batch after batch.
Typical Application Areas
Silicon Manganese 63‑25 is essential in various steel production processes:
- Carbon Steel Production: As a deoxidizer and to impart specific properties to the final product.
- Stainless Steel Manufacturing: To control composition and improve corrosion resistance.
- Alloy Steel Production: For creating steels with specific mechanical properties (strength, hardness, ductility).
- Foundry Applications: In cast iron production to control graphite formation and improve mechanical properties.
- Welding Electrode Manufacturing: As a coating component in certain types of welding electrodes.
For specific application guidance or custom formulations, contact our technical team for personalized recommendations based on your production requirements.
Technical Specifications – SiMn63‑25
Our Silicon Manganese 63‑25 is produced to meet international standards with strict quality control throughout the manufacturing process.
Chemical Composition (Grade SiMn63‑25)
| Grade | Mn (%) | Si (%) | C (%) | P (%) | S (%) | Fe (%) |
|---|---|---|---|---|---|---|
| SiMn60-14 | 60.0-63.0 | 14.0-16.0 | ≤2.5 | ≤0.30 | ≤0.05 | Balance |
| SiMn63-25 | 63.0-66.0 | 24.0-26.0 | ≤0.5 | ≤0.25 | ≤0.04 | Balance |
| SiMn60-25 | 60.0-63.0 | 24.0-26.0 | ≤0.5 | ≤0.3 | ≤0.05 | Balance |
| SiMn60-28 | 60.0-63.0 | 27.0-29.0 | ≤0.5 | ≤0.3 | ≤0.05 | Balance |
| SiMn65-17 | 65.0-68.0 | 17.0-19.0 | ≤1.8 | ≤0.25 | ≤0.04 | Balance |
| SiMn65-25 | 65.0-68.0 | 24.0-26.0 | ≤0.5 | ≤0.25 | ≤0.04 | Balance |
Physical Properties
| Property | Value | Unit |
|---|---|---|
| Melting Point | 1200–1300 | °C |
| Density | 6.3–6.5 | g/cm³ |
| Appearance | Metallic gray, angular lumps | - |
| Bulk Density | 3.2–3.5 | g/cm³ |
Available Sizes
- Lumps: 10–60mm, 10–100mm, or customized sizes
- Powder: 0–3mm, 0–10mm for specific applications
- Custom Sizes: Available upon request to meet specific process requirements
Application Guidelines for SiMn63‑25
Silicon Manganese 63‑25 is a versatile high‑silicon alloy with multiple metallurgical uses. Detailed guidelines are provided below.
Steelmaking Deoxidation
In steel production, SiMn63‑25 is added during the refining stage to remove oxygen from molten steel. The deoxidation reaction forms manganese silicate and silica, which float to the surface as slag. The higher silicon content offers stronger deoxidation power than lower‑silicon grades.
Recommended addition: 2–5 kg per ton of steel, depending on initial oxygen content and desired final composition.
Alloying in Steel Production
As an alloying agent, SiMn63‑25 imparts specific properties:
- Manganese increases strength, hardness, and hardenability.
- Silicon improves strength while maintaining ductility and enhances electrical properties.
Desulfurization
Silicon Manganese aids in sulfur removal, crucial for producing high‑quality steel with improved mechanical properties and reduced hot shortness.
Foundry Applications
In cast iron production, SiMn63‑25 controls graphite structure and improves mechanical properties. It also deoxidizes the melt and reduces porosity in castings.
Welding Electrode Production
Silicon Manganese powder (63‑25 grade) is used in coatings of certain welding electrodes to provide deoxidizing and alloying elements during welding.
Packaging & Logistics – SiMn63‑25
Packaging Options
We offer various packaging solutions to meet different customer requirements and ensure product integrity during transportation:
- 1‑ton Jumbo Bags: Most common option, easy to handle with standard equipment
- 25kg Bags: For smaller orders or specific application requirements
- Custom Packaging: We can accommodate special packaging requests (e.g., palletized, shrink‑wrapped)
Logistics Information
| Parameter | Details |
|---|---|
| Minimum Order Quantity | 20 metric tons |
| Lead Time | 15‑20 days after order confirmation |
| Port of Loading | Main Chinese ports (Tianjin, Shanghai, Qingdao) |
| Shipping Options | FOB, CIF, CFR (depending on destination) |
| Payment Terms | T/T, L/C at sight |
Download Center
Access our technical documentation for detailed product information:
Frequently Asked Questions – SiMn63‑25
Is it possible to entrust a third-party inspection to check the quality before shipment?
+
Certainly, we support third-party inspections by internationally recognized quality inspection agencies such as SGS and BV to verify product quality before shipment. The inspection covers product appearance, weighing, dimensions, and chemical composition analysis. The entire inspection process will be documented with photos and written records, which will be provided to you together with the final inspection report. This ensures you have no concerns regarding product quality.
What is the difference between Silicon Manganese 63‑25 and standard 65‑17?
+
SiMn63‑25 contains a higher silicon content (25‑26%) compared to SiMn65‑17 (17‑19% Si). This makes 63‑25 a more powerful deoxidizer and allows greater silicon addition per kilogram of alloy. It is often chosen when higher silicon pickup is desired or to reduce the amount of separate ferrosilicon additions.
What is the typical consumption of SiMn63‑25 in steel production?
+
Consumption typically ranges from 2‑5 kg per ton of steel, depending on initial oxygen content, desired final silicon/manganese levels, and the specific steel grade. Our technical team can provide precise recommendations based on your process parameters.
Can you provide custom sizes or composition adjustments for SiMn63‑25?
+
Yes, we regularly produce custom sizes (e.g., 10‑60mm, 10‑80mm) and can adjust chemistry within certain limits (e.g., tighter carbon or phosphorus). Contact our sales team to discuss your specific needs.
What quality certifications do you have for this alloy?
+
We hold ISO 9001:2015 certification, and our SiMn63‑25 complies with international standards including GB/T 4008‑2008, ASTM A99, and ISO 5445. Every batch is tested in our in‑house laboratory.
What is your production capacity and lead time for SiMn63‑25?
+
We have an annual production capacity of over 50,000 metric tons of silicon manganese. Standard lead time is 15‑20 days after order confirmation. Rush orders can be accommodated depending on production schedule and quantity.
Why Choose Our Silicon Manganese
20+ Years Experience
Specialized in ferroalloy production with deep industry knowledge
Strict Quality Control
Every batch tested to ensure consistent composition and performance
Global Delivery
Reliable logistics network ensuring timely delivery worldwide
Quality & Production Showcase
Explore our quality control process, production facilities, and customer interactions
Different Grades of Silicon Manganese Comparison
Loading product overview...
Related Products
Ferro Silicon
Ferro Silicon 65%,70%,72%,75%,85% grades,high-purity ferro silicon with ultrol low impurities,C 0.01-0.2%,Al 0.01-2%,10-50mm,3-10mm,0-3mm with customizable specifications and sizes.
View Details
Silicon Calcium
Si60/Ca30, Si58/Ca30,customizable chemistries (Ca 20-32%, Si 50-60%) with lump (10-50mm) and powder (0-3mm,0-2mm) options.
View DetailsReady to Order or Need More Information?
Contact our technical sales team for pricing, samples, or application advice tailored to your specific needs.
Contact Us Today