Product Overview

Silicon Carbide 70% (SiC 70) is an industrial-grade silicon carbide material containing a minimum of 70% SiC. It is primarily used in metallurgical and foundry processes where silicon carbide serves as a source of silicon and carbon or as an additive under suitable furnace conditions.

SiC 70 is typically supplied as black or dark-gray granular material in different particle sizes. Its chemical specification includes SiC content, free carbon, Fe₂O₃ and moisture limits. Compared with higher-content silicon carbide grades, SiC 70 may be considered when its impurity limits and effective SiC content meet the requirements of the intended application.

Available particle sizes include 0–1 mm, 1–3 mm, 0–5 mm, 3–5 mm and 5–10 mm. Customized sizes can be discussed according to your production requirements.

Silicon Carbide 70% Technical Specifications

The chemical composition and particle size of SiC 70 should be checked against your actual production requirements. The following values are the reference specifications listed for this product.

Specification Note: These values are reference specifications rather than batch-specific test results. Final chemical limits, particle-size distribution and quality documentation should be confirmed according to your purchase requirements.

Understanding SiC 70 Chemical Composition

When evaluating silicon carbide 70%, you should not rely only on the minimum SiC percentage. Free carbon, iron oxide, moisture and other impurities may affect material suitability for your production process.

The main items to review include:

• SiC Content: Determines the minimum silicon carbide content specified for the grade.
• Free Carbon: Represents carbon that is not chemically combined within SiC. It should be distinguished from the carbon contained in the silicon carbide compound itself.
• Fe₂O₃: An iron oxide impurity indicator that may be relevant to your material specification.
• Moisture: Should be controlled according to your storage, handling and process requirements.
• Other Impurities: Additional limits, such as silica or mineral residue, may need to be confirmed for particular applications.

If your production requires tighter impurity control, please provide the relevant chemical limits so we can review the specification before quotation.

Main Applications of Silicon Carbide 70%

1. Metallurgy and Steelmaking

Metallurgical silicon carbide 70% can be considered for selected steelmaking and ferroalloy-related operations where silicon carbide is used as a source of silicon and carbon or as a deoxidizing additive.

Under suitable furnace conditions, SiC participates in high-temperature reactions that may contribute to the metallurgical process. Its effectiveness depends on the furnace operation, charge chemistry, addition method and expected element recovery.

When evaluating SiC 70 for steelmaking, you should confirm:

• The required silicon and carbon contribution.
• The acceptable free carbon and impurity limits.
• The appropriate particle size for the addition method.
• The expected recovery under your operating conditions.

Because SiC 70 contains a lower minimum SiC percentage than higher-content grades, you should compare the effective SiC input and impurity contribution rather than assuming that the lowest price per metric ton offers the best value.

2. Foundry and Cast Iron Production

In foundry applications, Silicon Carbide 70% may be used as a silicon and carbon additive during cast iron melting, provided its chemical composition meets the foundry’s requirements.

Silicon carbide additions can influence molten iron chemistry and, under suitable conditions, may affect graphite nucleation and the resulting cast iron microstructure.

Actual results depend on several factors:

• Initial molten iron composition.
• Silicon carbide content and impurity levels.
• Particle size and addition rate.
• Furnace temperature and melting conditions.
• Existing inoculation and treatment practices.

For gray iron or ductile iron production, you should confirm whether the listed SiC 70 specification meets your chemical and process requirements before selecting the material.

3. Selected Refractory Applications

Silicon carbide is used in refractory and wear-resistant materials because of its hardness and high-temperature properties.

SiC 70 may be considered for selected refractory formulations where its minimum SiC content, impurity limits and particle-size distribution meet the required material specification.

However, refractory manufacturing can require different technical characteristics from metallurgical applications. Suitability should be evaluated according to the formulation, operating environment and performance requirements.

If you are sourcing SiC 70 for refractory production, please provide your required chemical composition and particle-size distribution before ordering.

SiC 70 vs SiC 75: How Should You Choose?

Both Silicon Carbide 70% and Silicon Carbide 75% are industrial-grade materials, but their minimum SiC contents and specified impurity limits differ.

SiC 70 contains at least 70% silicon carbide and can be considered when the listed chemical specification meets your production requirements.

SiC 75 contains at least 75% silicon carbide and may be more suitable when a higher minimum SiC content or different impurity limits are required.

When comparing these grades, you should evaluate:

• Minimum SiC content and the required effective SiC input.
• Free carbon and other impurity limits.
• Expected element recovery and material consumption.
• Price per metric ton under comparable delivery conditions.
• Particle size, packing and application suitability.

A lower purchase price does not automatically mean a lower processing cost. The appropriate grade depends on your actual furnace requirements, acceptable impurity contribution and expected material performance.

If your production requires higher SiC content, you can also review our Silicon Carbide (SiC) 88% / 90% specifications.

Silicon Carbide 70% Particle Sizes and Packaging

Available Particle Sizes

We supply SiC 70 in several particle-size ranges for different handling and production requirements.

• 0–1 mm
• 1–3 mm
• 0–5 mm
• 3–5 mm
• 5–10 mm
• Customized sizes upon confirmation

Particle size can affect how silicon carbide is introduced into the furnace and how it behaves during processing. You should choose the size range according to your equipment, material handling method and intended application.

If you need a customized size distribution, please provide the required range and acceptable fines content.

Export Packaging

Available packing options include:

• 25 kg woven bags for smaller handling units.
• 1 MT jumbo bags for bulk industrial orders.
• Customized packing according to agreed shipment and handling requirements.

The packing method should be confirmed according to your order quantity, unloading equipment, warehouse conditions and destination requirements.

Storage Recommendations

To help maintain the condition of silicon carbide during storage, keep the material in a clean, dry and covered location.

Packages should be protected from unnecessary moisture exposure, contamination and physical damage. If the material is stored for an extended period, check the condition of the packaging before use.

Quality Control and Supply Support

At ZHENAN, we supply Silicon Carbide 70% for industrial customers who require clearly defined chemical specifications, particle sizes and export packing arrangements.

Before confirming your order, we can review the relevant specification and quality requirements, including:

• SiC Content: Confirmation of the required minimum silicon carbide content.
• Impurity Limits: Review of free carbon, Fe₂O₃, moisture and other required indicators.
• Particle Size: Agreement on the required size range and any additional distribution requirements.
• Quality Documentation: Discussion of chemical analysis and inspection documents required for your order.
• Packaging: Confirmation of the agreed packing type and quantity.

We support bulk industrial purchasing and can discuss customized particle sizes and packaging according to your requirements.

If you require a COA or third-party inspection, please specify the test items and documentation requirements when submitting your inquiry so we can confirm the available arrangements.

What Should You Confirm Before Ordering Silicon Carbide 70%?

Before purchasing SiC 70, you should confirm that the chemical composition, particle size and commercial conditions meet your production requirements.

To help us prepare a suitable quotation, please provide:

• Product Grade: Silicon Carbide 70%.
• Chemical Specification: Required SiC content, free carbon and other impurity limits.
• Particle Size: Standard or customized size range.
• Application: Metallurgy, foundry or refractory production.
• Order Quantity: Required quantity in metric tons.
• Packaging: 25 kg bags, 1 MT jumbo bags or other requirements.
• Destination: Destination port or delivery location.
• Documentation: COA or additional inspection requirements, if applicable.

With this information, we can review the applicable specification, available supply and quotation conditions for your order.

Frequently Asked Questions About Silicon Carbide 70%

What is Silicon Carbide 70%?

Silicon Carbide 70% is an industrial-grade silicon carbide material with a minimum SiC content of 70%. It is available in different particle sizes for selected metallurgical, foundry and refractory applications.

What is Silicon Carbide 70% used for?

SiC 70 may be used as a source of silicon and carbon or as a metallurgical additive in suitable steelmaking and foundry processes. It may also be considered for selected refractory formulations when the chemical composition and particle-size requirements are met.

What chemical specifications should I check for SiC 70?

Our listed reference specification includes SiC content of at least 70%, free carbon of no more than 8%, Fe2O3 of no more than 3.0% and moisture of no more than 0.5%. Additional impurity limits should be confirmed according to your application.

What is the difference between SiC 70 and SiC 75?

SiC 70 contains at least 70% silicon carbide, while SiC 75 contains at least 75%. The appropriate grade depends on the required SiC input, impurity limits, purchasing cost and application conditions. Higher SiC content does not automatically guarantee better performance in every process.

What particle sizes and packaging options are available?

Common SiC 70 sizes include 0–1 mm, 1–3 mm, 0–5 mm, 3–5 mm and 5–10 mm. Standard packing options include 25 kg bags and 1 MT jumbo bags. Customized sizes and packaging can be discussed before ordering.

Can I request a COA and bulk quotation?

Yes. We support bulk industrial inquiries. You can send us your required chemical specification, particle size, quantity and destination port. COA and third-party inspection requirements can be discussed as part of the order confirmation process.

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When we receive your request, we will send you our personal catalog, price list, delivery terms, payment terms, and other necessary detailed information via email within 24 hours.

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