Silicon Carbon Alloy 65-15 – High-Grade Carbon Silicon (Si 65% min, C 15% min) for Premium Steelmaking
High-performance silicon carbon alloy with minimum 65% silicon and 15% carbon. Designed for precise deoxidation and alloying in high-grade steel production, offering improved efficiency over conventional ferroalloys.
| Main Composition | Si 65% min, C 15% min, S ≤0.05%, P ≤0.05% (typical) |
| Form | Lumps (10-50mm), Granules (3-8mm), Powder (0-3mm, 0-10mm), Custom sizes available |
| Application | High-grade steel deoxidation, alloying, electric furnace steelmaking, foundry casting |
| Standard | GB/T 2272-2020, ASTM A100, ISO 5445 |
Silicon Carbon Alloy 65-15 – Product Overview
Silicon Carbon Alloy 65-15 is a premium-grade composite alloy containing minimum 65% silicon and 15% carbon. It is produced through advanced carbothermic reduction of selected quartz and carbon sources in submerged arc furnaces with strict process control. The higher silicon content (65% min) makes it ideal for applications requiring precise metallurgical control, offering excellent deoxidation efficiency while providing simultaneous carburization. It serves as a superior alternative to traditional ferrosilicon in high-grade steel production.
Product Core Advantages
- Enhanced Silicon Content: Minimum 65% Si for more efficient deoxidation and precise alloying.
- Dual Functionality: Combines silicon deoxidation with carbon carburization in a single product.
- Cost Savings: Significant cost advantage compared to ferrosilicon + carburizer combinations.
- Fast Melting: Optimized density ensures rapid dissolution and high recovery rates.
- Custom Sizing: Available in lumps, granules, or powder to match your specific process.
- Stable Supply: Produced in modern furnaces with ISO 9001 quality management.
Typical Application Areas
Silicon Carbon Alloy 65-15 is essential in premium metallurgical processes:
- High-Grade Steel Deoxidation: Efficiently removes oxygen from molten steel, producing cleaner steels with fewer inclusions.
- Precision Alloying: Adds silicon and carbon simultaneously to achieve tight composition targets in spring steel, rail steel, and tool steel.
- Electric Furnace Steelmaking: Used as a charge material to optimize composition and reduce tap-to-tap time.
- Foundry Industry: Improves fluidity and mechanical properties of high-grade castings.
- Substitute for FeSi 75: Replaces traditional ferrosilicon in many applications with better economics and added carbon value.
For specific application guidance or custom formulations, contact our technical team for personalized recommendations based on your production requirements.
Technical Specifications – Silicon Carbon Alloy 65-15 & Common Grades
Our Silicon Carbon Alloy 65-15 is produced to meet international standards with strict quality control. Below is the chemical composition of our primary grade (65-15) compared with other common industrial grades for reference.
Chemical Composition (Typical Values, % by weight)
| Grade / Designation | Si (%) | C (%) | S (%) | P (%) | Typical Application |
|---|---|---|---|---|---|
| 65-15 | 65 min | 15 min | ≤0.05 | ≤0.05 | High-grade steel, precise alloying |
| 60-15 | 60 min | 15 min | ≤0.05 | ≤0.05 | General steelmaking, deoxidation |
| 68-18 | 68 min | 18 min | ≤0.03 | ≤0.04 | Specialty steel, high-carbon applications |
| 40-20 (0-8mm powder) | 40 min | 20 min | ≤0.05 | ≤0.05 | Powder injection, sintering |
| 50-20 (0-8mm powder) | 50 min | 20 min | ≤0.05 | ≤0.05 | Powder metallurgy, injection |
Physical Properties
| Property | Value | Unit |
|---|---|---|
| Melting Point | 1250-1350 | °C |
| Density (at 20°C) | 3.0-3.5 | g/cm³ |
| Appearance | Dark gray metallic lumps / granules / powder | - |
| Bulk Density (lumps) | 1.8-2.2 | g/cm³ |
Available Sizes
- Lumps: 10-50mm, 10-100mm, 50-100mm (standard), custom sizes available
- Granules: 3-8mm, 1-3mm
- Powder: 0-2mm, 0-10mm,
- Custom Sizes: Available upon request to meet specific process requirements
Application Guidelines – Silicon Carbon Alloy 65-15
Silicon Carbon Alloy 65-15 is a high-performance material with the following primary applications:
Precision Deoxidation in Ladle Furnace
Added during ladle refining (typically 1-5 kg per ton) to achieve precise oxygen control. The higher silicon content ensures rapid deoxidation while carbon provides additional refining benefits. Ideal for producing clean steel with tight inclusion control.
Alloying in Spring Steel and Rail Steel
65-15 is particularly suited for grades requiring both silicon and carbon, such as 60Si2Mn spring steel and U71Mn rail steel. The balanced composition allows single-step addition, improving consistency and reducing alloying time.
Electric Arc Furnace Optimization
Used as part of the charge or added during melting to increase silicon and carbon levels efficiently. Its high density ensures good penetration into the molten bath.
Foundry Applications for High-Grade Castings
In ductile iron and high-strength gray iron production, 65-15 improves microstructure and mechanical properties while reducing production costs.
Typical Addition Rates (Steelmaking)
Addition rates typically range from 2 to 12 kg per ton of steel, depending on target specifications. Our technical team can assist with optimal sizing and addition practices for maximum recovery and precision.
Packaging & Logistics – Silicon Carbon Alloy 65-15
Packaging Options
We offer various packaging solutions to meet different customer requirements and ensure product integrity during transportation:
- 1‑ton Jumbo Bags: Common option, easy to handle with standard equipment.
- 25kg / 50kg Bags: For smaller orders or specific application requirements (e.g., foundries).
- Custom Packaging: We can accommodate special packaging requests, including moisture-proof liners or small drums.
Logistics Information
| Parameter | Details |
|---|---|
| Minimum Order Quantity | 20 metric tons (less for trial orders, subject to availability) |
| Lead Time | 15-20 days after order confirmation |
| Port of Loading | Main Chinese ports (Tianjin, Shanghai, Qingdao, Huangpu) |
| Shipping Options | FOB, CIF, CFR, DAP (depending on destination) |
| Payment Terms | T/T, L/C at sight, or negotiable |
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Access our technical documentation for detailed product information:
Frequently Asked Questions – Silicon Carbon Alloy 65-15
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 are the advantages of 65-15 over standard 60-15?
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65-15 offers higher silicon content (65% min vs 60% min), allowing more efficient deoxidation and requiring lower addition rates to achieve target silicon levels. This makes it ideal for high-grade steel applications where precise control and minimal impurity introduction are critical.
Can 65-15 be used in stainless steel production?
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Yes, 65-15 can be used in certain stainless steel grades where carbon is acceptable (e.g., ferritic and martensitic stainless steels). For austenitic grades requiring very low carbon, we recommend our low-carbon silicon products.
What sizes are available for injection systems?
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For injection systems, we offer granules in 1-6mm or 2-8mm, as well as powder in 0-2mm or 0-10mm. Custom sizing can be arranged to match your injection equipment specifications.
Do you provide technical support for optimizing addition rates?
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Absolutely. Our metallurgical engineers can work with your team to determine optimal addition rates, sizing, and practices based on your furnace type, steel grades, and quality requirements.
What is your quality control process for 65-15?
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Each batch is tested for Si, C, S, P, and other elements in our ISO 17025 accredited laboratory. We provide a Certificate of Analysis with every shipment and can arrange third-party inspection upon request.
Why Choose Our Silicon Carbon(High Carbon Silicon)
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
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Different Grades of HC-Silicon(Si-C Alloy) Comparison
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