Fire Clay Bricks are economical refractory bricks made from clay-based materials containing 30–48% alumina, offering good thermal stability, moderate strength, and excellent resistance to thermal shock.
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info@rsrefractories.comFire Clay Bricks are one of the most commonly used refractory materials in industrial furnaces and kilns. Produced from high-quality fireclay and kaolin through molding and high-temperature firing, these bricks offer reliable performance in medium-temperature environments. They provide good thermal shock resistance, strong resistance to abrasion and chemical corrosion, and stable structural integrity under repeated heating cycles. With multiple grades (SK-30, SK-32, SK-34, SK-36), Fire Clay Bricks can be used in a wide range of thermal equipment, serving as cost-effective linings for industrial applications.
| ITME | SK 31 | SK 30 | SK 30 | SK 29 | SK 29 | SK 28 | SK 27 |
| CHINA CODE | N-1 | N-2a | N-2b | N-3a | N-3b | N-4 | N-5 |
| Refractoriness ℃ | 1750 | 1730 | 1730 | 1710 | 1710 | 1690 | 1670 |
| Al2O3 % | 40 | 39 | 34 | 34 | 32 | 32 | 31 |
| Fe2O3 % | 2.1 | 2.1 | 2.3 | 2.3 | 2.5 | 2.5 | 2.5 |
| Apparent Porosity％ | 22 | 24 | 26 | 24 | 26 | 24 | 26 |
| Bulk Density g/cm3 | 2.15 | 2.1 | 2.1 | 2.05 | 2.05 | 2.05 | 2 |
| Cold Crushing Strength Mpa |
30 | 25 | 20 | 20 | 15 | 20 | 15 |
| 0.2Mpa Refractoriness Under Load T0.6 ℃ ≥ |
1400 | 1350 | 1350 | 1320 | 1320 | 1300 | 1300 |
| Reheating Linear Change 1400℃ |
0.1–0.4 | 0.1–0.5 | 0.2–0.5 | ||||
| Reheating Linear Change 1350℃ |
0.2–0.5 | 0.2–0.5 | 0.2–0.5 | 0.2-0 |
Fire Clay Bricks are widely used in:
Industrial boilers and incinerators
Cement rotary kilns and preheaters
Glass furnaces (non-contact areas)
Metallurgical furnaces: reheating furnaces, ladle covers, blast furnace linings
Ceramic kilns and tunnel kilns
Fireplace and pizza oven construction
Chimneys and thermal equipment linings
Comprehensive Refractory Product Range
We manufacture 3 main types of refractory materials — refractory castables, high alumina cement, and refractory bricks — covering 100+ industrial furnace types worldwide.
Certified Quality and International Standards Compliance
All batches undergo strict quality control. Products comply with ISO, ASTM, and GB standards, ensuring reliable performance in high-temperature industrial applications.
Annual Production Capacity of 130,000 Tons
With a large-scale capacity of 130,000 tons per year, we guarantee stable supply and on-time delivery for long-term and large-volume projects.
Exported to 120+ Countries and 1,000+ Projects
Our products have been successfully delivered to over 120 countries, supporting more than 1,000 industrial projects, including cement, steel, incineration, glass, and petrochemical furnaces.
20+ Years of Experience in Refractory Manufacturing
With over 20 years of experience, we understand real furnace conditions and deliver materials proven in long-term industrial operations worldwide.
Professional Technical Support and Free Samples
We provide technical assistance from material selection to installation guidance, with free samples available for testing and supporting 1,000+ projects globally.
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