HA 70 Fire Bricks

HA 70 Fire Bricks

HA 70 Fire Bricks from The Fire Bricks Supply Co, Kolkata’s leading supplier and wholesaler, deliver exceptional performance in extreme-heat applications. Crafted with 70% alumina content, these bricks provide outstanding resistance to thermal shock and slag corrosion, making them ideal for steel furnaces, glass kilns, and petrochemical reactors. Their high mechanical strength and low creep rate ensure structural integrity under continuous high-temperature exposure. Available in standard and custom sizes, our HA 70 Fire Bricks streamline installation and reduce maintenance costs. Rely on The Fire Bricks Supply Co for prompt bulk supply and industry-leading quality across Eastern India.

Technical specifications of HA 70 Fire Bricks

Parameter	Specification
Product Name	HA 70 Fire Bricks
Alumina Content (Al₂O₃)	Minimum 70 %
Silica Content (SiO₂)	≤ 28 %
Bulk Density	2.6 – 2.8 g/cm³
Apparent Porosity	16 – 18 %
Cold Crushing Strength (CCS)	≥ 250 kg/cm²
Modulus of Rupture	≥ 40 kg/cm²
Thermal Conductivity @ 1000 °C	1.4 – 1.8 W/m·K
Maximum Service Temperature	Up to 1750 °C
Refractoriness Under Load	≥ 1550 °C
Thermal Shock Resistance	≥ 25 cycles at 1000 °C
Creep Restriction	≤ 0.5 % at 1500 °C
Chemical Resistance	Excellent against acidic and basic slags
Standard Size	230 × 114 × 65 mm (Custom sizes available)
Water Absorption	≤ 12 %

Features

HA 70 Fire Bricks maintain dimensional stability even after repeated heating and cooling cycles.
Their high alumina formulation reduces thermal conductivity, improving overall furnace efficiency.
These bricks resist melting and erosion when exposed to aggressive molten slags.
Precision manufacturing ensures minimal joint thickness and uniform brickwork.
Their dense microstructure minimizes gas permeability, enhancing insulation performance.