Silicon Manganese - SiMn65-25 - High-Manganese, High-Silicon Premium Alloy
Top-tier grade combining maximum manganese (65-68%) with high silicon (25-26%) for critical steel applications and maximum efficiency.
| Main Composition | Mn: 65-68%, Si: 25-26%, C: ≤0.5%, P: ≤0.25%, S: ≤0.04% |
| Form | Lumps (10-100mm), Powder (0-10mm), Custom sizes available |
| Application | High-end alloy steels, specialty spring steels, electrical steels, wear-resistant grades |
| Standard | GB/T 4008-2008, ASTM A99, ISO 5445 |
SiMn65-25 Product Overview
SiMn65-25 represents the pinnacle of silicon manganese alloys, delivering both high manganese and high silicon in a single product. It maximizes deoxidation efficiency while providing substantial alloying for strength and special properties.
Product Core Advantages
- Optimized Silicon Content: Highest manganese for strength and hardenability
- Effective Deoxidation: Silicon and manganese work synergistically for cleaner steel with reduced inclusions
- Desulfurization Capability: Aids in sulfur removal, improving steel quality and reducing hot shortness
- Cost-Efficient Alloying: Provides three key elements (Mn, Si, C) in one addition, streamlining the process
- Consistent Composition: Strict quality control ensures uniform chemistry across all batches
Typical Application Areas
Silicon Manganese 65-25 is essential in various metallurgical processes:
- High-Carbon Steel Production: As a combined alloying and deoxidizing addition
- Rail Steel & Wear-Resistant Steels: Imparts necessary hardness and strength
- Alloy Steel Manufacturing: For creating steels with specific mechanical properties requiring controlled carbon
- Foundry Castings: In cast iron production to control graphite formation and improve mechanical properties
- Specialty Welding Electrodes: As a component in coatings requiring higher carbon content
For specific application guidance or custom formulations, contact our technical team for personalized recommendations based on your production requirements.
Technical Specifications
Our Silicon Manganese 65-25 alloy is produced to meet international standards with strict quality control throughout the manufacturing process.
Chemical Composition
| Grade | Mn (%) | Si (%) | C (%) | P (%) | S (%) | Fe (%) |
|---|---|---|---|---|---|---|
| SiMn65-25 | 65.0-68.0 | 24.0-26.0 | ≤0.5 | ≤0.25 | ≤0.04 | Balance |
| SiMn65-17 | 65.0-68.0 | 17.0-19.0 | ≤1.8 | ≤0.25 | ≤0.04 | Balance |
| SiMn60-14 | 60.0-63.0 | 14.0-16.0 | ≤2.5 | ≤0.30 | ≤0.05 | 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 |
| SiMn63-25 | 63.0-66.0 | 24.0-26.0 | ≤0.5 | ≤0.25 | ≤0.04 | Balance |
Physical Properties
| Property | Value | Unit |
|---|---|---|
| Melting Point | 1180-1280 | °C |
| Density | 6.2-6.4 | g/cm³ |
| Appearance | Metallic gray, angular lumps | - |
| Bulk Density | 3.1-3.4 | 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
Silicon Manganese 65-25 is a specialized alloy with multiple applications in metallurgy. Below are detailed guidelines for its use in various processes.
Steelmaking Deoxidation & Alloying
In steel production, SiMn65-25 is added during the refining stage to remove oxygen while simultaneously contributing manganese, silicon, and controlled carbon to the molten steel. The deoxidation products form a fluid slag that readily separates from the steel.
Recommended addition: 3-6 kg per ton of steel, depending on the initial oxygen content and desired final composition of carbon, manganese, and silicon.
High-Carbon & Wear-Resistant Steels
For grades requiring higher carbon along with manganese and silicon (such as rail steels or wear plates), SiMn65-25 provides an efficient single addition:
- Manganese increases strength, hardness, and hardenability
- Silicon improves strength and deoxidation
- Carbon contributes to hardness and wear resistance
Desulfurization
Like other silicon manganese grades, SiMn65-25 aids in sulfur removal, which is crucial for producing high-quality steel with improved mechanical properties and reduced hot shortness.
Foundry Applications
In cast iron production, SiMn65-25 is used to control the graphite structure and improve mechanical properties, while the higher carbon content can be beneficial in certain iron grades. It also helps in deoxidizing the melt and reducing porosity in castings.
Welding Electrode Production
SiMn65-25 powder is used in the coating of certain types of welding electrodes where a higher carbon transfer is desired during the welding process.
Packaging & Logistics
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
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
Is it possible to entrust a third-party inspection to check the quality before shipment?
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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 SiMn65-25 and standard SiMn65-17?
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SiMn65-25 contains significantly higher silicon (25-26% vs 17-19%) and higher carbon (≤2.5% vs ≤1.8%) compared to SiMn65-17. This makes SiMn65-25 more suitable for steel grades that require higher silicon content for specific properties (like electrical steels, spring steels) or where controlled carbon addition is beneficial alongside manganese and silicon.
What is the typical consumption of Silicon Manganese 65-25 in steel production?
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The typical consumption ranges from 3-6 kg per ton of steel, depending on factors such as the initial oxygen content, desired final composition of manganese, silicon, and carbon, and the specific steel grade being produced. Our technical team can provide more precise recommendations based on your specific process parameters.
Can you provide custom sizes or compositions for SiMn65-25?
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Yes, we regularly produce custom sizes and can adjust the composition within certain limits (e.g., tighter carbon ranges, modified silicon/manganese ratios). We can provide various size fractions from powder to large lumps. Contact our sales team to discuss your specific needs.
What quality certifications do you have for this product?
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We hold ISO 9001:2015 quality management system certification and our SiMn65-25 complies with international standards including GB/T, ASTM, and ISO. We implement strict quality control throughout the production process, from raw material selection to final product inspection.
What is your production capacity and lead time for SiMn65-25?
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We have an annual production capacity of over 40,000 metric tons of Silicon Manganese 65-25. Standard lead time is 15-20 days after order confirmation, but we can accommodate rush orders depending on production schedule and quantity. Larger orders may require slightly longer lead times.
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
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