What is silicon carbide (SiC)?

Silicon carbide (SiC) is an industrial material produced from silicon and carbon. It is widely used in metallurgical grade silicon carbide applications because it performs well at high temperature and in harsh conditions. Buyers usually purchase silicon carbide as lumps or granules and check quality through silicon carbide COA (Certificate of Analysis) before shipment.

Difference 1: silicon carbide 88 vs silicon carbide 90 different specifications

The first difference is the grade itself. In most market practice, silicon carbide 90 is treated as a tighter-control grade than silicon carbide 88, meaning higher SiC content target and often lower impurity ranges.

Specification comparison

In real buying, the key is not only SiC%. Many buyers confirm Free C, SiO₂, Fe-related items, and S/P if required, because these details influence performance and consistency in metallurgy and refractory systems.

Difference 2: where silicon carbide 88 is used VS where silicon carbide 90 is used？

The second difference is application fit. Both grades can work, but they are often chosen for different priorities.

Where silicon carbide 88 is used?

Silicon carbide 88 is commonly used when buyers want a practical balance of performance and cost, especially in:

• silicon carbide for metallurgy (routine heats where the process has some tolerance)

• silicon carbide for refractory products where cost-performance is important

• bulk supply projects where buyers focus on stable supply and clear COA

This is why many buyers search “silicon carbide 88 used for” and also ask for a silicon carbide 88 price reference when they plan volume purchasing.

Where silicon carbide 90 is used?

Silicon carbide 90 is often used when the process is more sensitive and the buyer wants tighter control, especially in:

• metallurgy applications where batch variation must be minimized

• refractory projects requiring higher consistency and longer service life

• customers with stricter acceptance limits on impurities

In these cases, buyers usually care less about the lowest price and more about stability, so they often request recent silicon carbide COA and confirm the supplier can keep the same spec across shipments.

Summary: silicon carbide 88 vs silicon carbide 90 in one sentence

If you want a simple summary: silicon carbide 90 is usually chosen for tighter chemistry control and higher consistency, while silicon carbide 88 is often chosen for cost-efficient routine use, as long as the supplier can keep stable quality and sizing.

Not sure which grade to buy?

Contact ZhenAn for a recommendation

If you are not sure whether to buy silicon carbide 88 or select silicon carbide 90, you can send us your application (metallurgy or refractory), size requirement, and impurity limits. We will recommend the best grade and share COA/SDS for review.

At ZhenAn Metallurgy, we work as an experienced silicon carbide supplier for export and industrial buyers. We support stable supply, clear documentation, and practical product selection so you can purchase with confidence.

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