Fireclay bricks and shapes

Fireclay brick is the most common aluminosilicate refractory. It is made from refractory clay and chamotte. It withstands prolonged heating and temperature changes and is suitable for acidic and weakly acidic environments.

We supply fireclay bricks of grades ША and ШБ to GOST 390; product numbers (shapes and sizes) to GOST 8691. For laying we select МШ fireclay mortar to GOST 6137.

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Grades and types

Fireclay brick ША

To GOST 390, class A; product numbers and sizes to GOST 8691. Fireclay brick with a higher alumina content than class B, for the working layer in hot zones: boilers, fireboxes, kilns and reheating furnaces. We supply straight, wedge and shaped bricks; laying is done with МШ fireclay mortar.

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Fireclay brick ШБ

To GOST 390, class B; shapes to GOST 8691. For moderate-temperature zones: flues, chimney ducts, fireboxes, protective and auxiliary lining layers. The brick class is chosen by the zone temperature — send us a description of the unit and we will advise.

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Can’t find the grade you need? Write to us — we supply other items too.

In brief

Parameter	Value
Standard	GOST 390, shapes and sizes — GOST 8691
Grades	ША (class A), ШБ (class B)
Applications	boilers, fireboxes, kilns and reheating furnaces, flues, chimney ducts
Laying	МШ fireclay mortar
Supply	under contract with legal entities, delivery across Kazakhstan

How to choose a grade

The grade is chosen by the zone temperature. ША is class A with a higher alumina content and goes into hotter zones: boilers, fireboxes, kilns and reheating furnaces. ШБ is class B for moderate temperatures: flues, chimney ducts, protective layer.

The product number (straight, wedge, shaped) is taken from the masonry drawing to GOST 8691. If there is no drawing, describe the unit and dimensions — we will select the shapes.

Laying and installation

Fireclay bricks are laid with МШ fireclay mortar; the mortar grade is matched to the brick grade. Refractory mortars →

Frequently asked questions

What is the difference between ША and ШБ bricks?

ША is class A with a higher alumina content, for hot zones of boilers and furnaces. ШБ is class B for moderate-temperature zones: flues, chimney ducts, protective layer.

How do I choose the fireclay brick number?

The number (shape and size) is determined by the masonry drawing; product numbers and sizes are set by GOST 8691. Send us the drawing or bill of materials — we will select the numbers and calculate the quantity.

Which mortar should be used to lay fireclay bricks?

МШ fireclay mortar to GOST 6137. The number in the mortar grade is the alumina content, %; it is matched to the brick grade.

How can an enterprise order fireclay bricks?

Send a request with the grade, quantity and delivery city or attach a specification. We will prepare a commercial offer, sign a contract and deliver the bricks across Kazakhstan.