Metallurgical Silicon Carbide for Steelmaking & Foundry Applications
SiC 75% and SiC 85% are specialized metallurgical silicon carbide grades designed for steelmaking deoxidation, carbon addition, and foundry operations where simultaneous silicon and carbon inputs are required.
Product Specifications
| Parameter |
SiC 75% |
SiC 85% |
| Product |
Metallurgical Silicon Carbide |
Metallurgical Silicon Carbide |
| Grade |
75% SiC |
85% SiC |
| Primary Function |
Deoxidation, Si/C Addition |
Deoxidation, Si/C Addition |
| Steelmaking Application |
Applicable |
Applicable |
| Foundry Application |
Applicable |
Applicable |
| Carbon Addition |
Applicable |
Applicable |
Chemical Composition Requirements
The 75% and 85% grades represent distinct chemical specifications. While SiC content is the primary differentiating factor, buyers should specify comprehensive impurity limits for each grade.
Typical Specification Parameters:
- SiC content
- Free carbon
- SiO₂ and other oxides
- Fe₂O₃ or total iron
- Sulfur content
- Phosphorus content
- Moisture level
Specific numerical limits should be established in commercial specifications.
Available Sizes and Forms
Metallurgical SiC is supplied in granular, particle, lump, pellet, or briquette forms tailored to application requirements. Commercial 85% SiC is commonly available in 0-10 mm, 1-10 mm, and 10-50 mm size ranges.
Product Characteristics & Functions
Steel Deoxidation
Effective deoxidizing agent for steel treatment processes.
Carbon Addition
Supplies carbon while simultaneously contributing silicon to the melt.
Silicon Adjustment
Enables precise adjustment of molten metal chemistry through silicon contribution.
Foundry Applications
Used as combined Si/C additive in iron foundries, influencing cast-iron nucleation and graphite formation.
Primary Applications
- Steelmaking: deoxidation, carbon adjustment, and silicon addition
- Cast iron production: gray and ductile iron manufacturing
- Foundry treatment: induction and cupola furnace operations
- Carbon addition: where combined silicon and carbon inputs are required
Grade Selection Guide
| Factor |
SiC 75% |
SiC 85% |
| Grade Designation |
75% SiC |
85% SiC |
| Steel Deoxidation |
Applicable |
Applicable |
| Carbon Addition |
Applicable |
Applicable |
| Foundry Use |
Applicable |
Applicable |
| Si/C Source |
Yes |
Yes |
Selection should be based on target melt chemistry, required SiC contribution, and specific process parameters. Physical form and particle size should be specified separately.
Technical Specification Requirements
Complete purchasing specifications should include:
- SiC grade designation
- Physical form requirements
- Particle size distribution
- Chemical impurity limits
- Moisture content
- Furnace type and addition method
- Target silicon and carbon levels
- Required quantity
Buyer Specification Checklist
| Requirement |
Buyer Information |
| Grade |
SiC 75% or SiC 85% |
| Form |
Required form (granular, lump, etc.) |
| Size |
Required particle size |
| Chemistry |
SiC and impurity limits |
| Application |
Steelmaking / foundry |
| Quantity |
Required quantity |
| Packing |
Required packaging |
| Destination |
Port / country |
| Documents |
COA, SDS, inspection requirements |
Quality Assurance & Documentation
Buyers should define grade and chemical limits prior to quotation. Quality is confirmed through applicable documentation, with Certificate of Analysis (COA) provided for lot-specific chemical analysis as agreed in purchase terms.
Packing & Delivery
Packaging is selected according to physical form, particle size, quantity, and handling equipment. Bulk bags and heavy-duty industrial bags are common formats for metallurgical SiC shipments.
Frequently Asked Questions
What is SiC 75% used for?
SiC 75% serves as a metallurgical silicon and carbon source in steelmaking and foundry applications.
What is SiC 85% used for?
SiC 85% is specified where higher SiC-content metallurgical grade is required for steelmaking or foundry processing.
Can both grades be used for steel deoxidation?
Yes, metallurgical SiC is effective for steel deoxidation; grade selection depends on target process and chemical specifications.
Can SiC 75% and 85% be used for cast iron?
Yes, both grades are used as Si/C additives in cast-iron production.
What sizes are available for SiC 85%?
Commercial availability includes 0-10 mm, 1-10 mm, and 10-50 mm size ranges for 85% metallurgical SiC.
What is the key difference between 75% and 85%?
The principal distinction is SiC content. Buyers should compare impurity limits, form, and particle size for comprehensive evaluation.
Can SiC replace separate carbon and silicon additions?
It can contribute both elements, but replacement of separate additives depends on specific melt chemistry and process requirements.
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