Standard Size: 9 x 4.5 x 2.5 inches (Equivalent to 230 x 114 x 65 mm).
Weight per Brick: Approximately 8.0 lbs (3.6 kg).
Material Grades: Available in Low Duty (2000F), High Duty (2700F), and Super Duty (3000F+).
Alumina Content: Ranging from 35 percent to 55 percent depending on your application.
Dimensional Tolerance: +/- 1.5 percent (Industry-leading precision for tight masonry joints).
1. High temperature resistance
2. Good wear resistance
3. Weakly acidic at high temperatures
4. Strong erosion resistance
5. Good volume stability
6. Low prices
Used for lining blast furnaces, hot blast furnaces, electric furnace roofs, oxygen converters, reverberatory furnaces, and rotary kilns. They are also widely used as regenerative flat furnace checker bricks, plugs for pouring systems, and water mouth bricks, among other applications.
Standard Firebrick 9 x 4.5 x 2.5: The Universal Solution for High-Heat Engineering
In the refractory industry, the 9 x 4.5 x 2.5 inch brick (often referred to as the 9-inch straight) is the foundation of almost every thermal structure. Whether you are relining an industrial boiler or building a high-end wood-fired pizza oven, the precision and quality of this standard brick determine the lifespan of your project.
At Highland Refractory, we don't treat "standard" as "basic." Our 9x4.5x2.5 firebricks are engineered with high-purity fireclay and alumina, ensuring they stand up to thermal shock, chemical erosion, and mechanical stress.
Technical Specifications
Standard Size: 9 x 4.5 x 2.5 inches (Equivalent to 230 x 114 x 65 mm).
Weight per Brick: Approximately 8.0 lbs (3.6 kg).
Material Grades: Available in Low Duty (2000F), High Duty (2700F), and Super Duty (3000F+).
Alumina Content: Ranging from 35 percent to 55 percent depending on your application.
Dimensional Tolerance: +/- 1.5 percent (Industry-leading precision for tight masonry joints).
Why This Size Matters
The 9 x 4.5 x 2.5 dimension is the international standard for a reason. Its 2:1 length-to-width ratio allows for perfect "half-bond" masonry patterns, ensuring maximum structural stability in walls and floors.
Applications for 9-Inch Straight Bricks
Industrial Kilns and Furnaces: As the primary working lining for heat treatment, ceramics, and glass manufacturing.
Wood-Fired Pizza Ovens: The high thermal mass of our 9-inch bricks ensures even heat distribution for the perfect crust every time.
Blacksmithing Forges: Durable enough to withstand direct flame and rapid temperature cycles without spalling.
Fireplaces and Fire Pits: Safe for indoor residential use and outdoor backyard entertainment areas.
The Highland Advantage: Precision You Can Trust
When you order firebricks from Highland Refractory, you are buying direct from the manufacturer. We solve the three biggest problems in refractory procurement:
Dimensional Consistency: We use high-pressure automated hydraulic presses to ensure that every brick in your order is the exact same size. This means less mortar, stronger bonds, and a longer-lasting furnace.
Food-Safe Mineral Composition: Our bricks are made from natural fireclay and alumina. We use zero harmful chemical binders, making our bricks 100 percent food-safe for bakery and pizza oven applications.
Zero-Damage Logistics: We understand that shipping heavy bricks globally is a challenge. We use reinforced export pallets, heavy-duty corner protectors, and vacuum-sealed plastic wrap to ensure your bricks arrive in perfect condition.
Wholesale Pricing and Global Shipping
Highland Refractory specializes in bulk B2B supply. By shipping directly from our facility, we eliminate middleman markups and offer the most competitive "landed cost" for your project.
Full Container Loads (FCL): Approximately 8,000 to 9,000 bricks per 20ft container.
Wholesale Quotes: Customized pricing based on your volume and required alumina grade.
Door-to-Port Delivery: Reliable shipping to the USA, Europe, Australia, and Southeast Asia.
Installation Tips
For a 9x4.5x2.5 brick lining, we recommend a joint thickness of 1/16 to 1/8 inch. Always use a high-temperature mortar that matches the alumina content of your bricks to ensure even thermal expansion.
Frequently Asked Questions (FAQ)
Q: Is 9 x 4.5 x 2.5 the same as 230 x 114 x 65 mm?
A: Yes. These are the imperial and metric versions of the same standard straight brick size used globally in the refractory industry.
Q: How many bricks do I need for my project?
A: One standard 9 x 4.5 x 2.5 brick covers approximately 40.5 square inches of surface area when laid flat. Our team can provide a full bill-of-materials calculation based on your drawings.
Q: What is the difference between "Red Bricks" and "Firebricks"?
A: Standard red bricks will crack and melt at high temperatures. Firebricks are made from specialized refractory minerals that can withstand temperatures above 2000 degrees Fahrenheit without losing structural integrity.
Get a Quote for Your Project Today
The success of your furnace depends on the quality of its foundation. Contact Highland Refractory today for a technical consultation and a competitive wholesale quote on our 9 x 4.5 x 2.5 standard firebricks.
Silicon carbide plates are mainly composed of silicon carbide (SiC) as the aggregate (with a content usually ≥ 80%).
