This sheet has a structure similar to Tanjid graphite sheet, which consists of punched steel in the middle and two asbestos sheets that are placed around it.
Of course, steel can be 304 or 316.
First, let's talk about punched asbestos and steel.
Asbestos (asbestos structure):
It is a very toxic fiber-like substance whose particles are dispersed in the air and flow.
Asbestos is a highly adaptable, strong, inexpensive, and non-flammable material that has been used in construction, refractory fabric, and construction, dating back 2,500 years.
Here are some of the features of Asbestos:
Inert: Asbestos fibers are chemically inert.
Low heat transfer rate
Punched steel: Steel sheets and plates are among the best materials for making structures and tools that require anti-oxidation properties. The only difference between the sheets and the steel plates is in the thickness. In general, steel plates are more than 6 mm thick, while steel sheets are produced with a thickness of less than 6 mm, and the thinner the metal, the larger the gauge number. Steel sheets and plates are supplied opaque and glossy.
The most common grades of stainless steel are 304, 316 and 410. However, low price, high flexibility, durability and high corrosion resistance are the main factors for the wider application of 304 and 304L grades. 316 is the best grade for marine and coastal environments, because its resistance to corrosion is superior to other grades.
Steel 316 difference:
316 steel sheet against chemicals such as alcohol, acid, and substances that cause iron decay, or better to say, have no destructive effect on this type of sheet.
+ Let's deal with the product that is created from the combination of these materials.
Dunite sheet is also known as embossed asbestos, which is due to the structure of this sheet.
As mentioned above, the structure of the dunite sheet is further explored in this section.
Dunite consists of two sheets of asbestos with layers of metal and stainless steel or 316 sheets. When all these components are pressed together and connected; They form a cohesive structure and a shape that has very good mechanical properties. Dunite refractory sheet is the most suitable option among pressure refractory sheets. Temperature tolerance of this sheet in ambient conditions up to 1100 ° C and in working environment and continuous conditions up to 900 ° C and against direct flame up to 700 ° C temperature tolerance is predicted for this product. The presence of steel in this refractory sheet has caused us to tolerate more pressure, heat, tension and abrasion, and at very high temperatures, a good strength of this sheet can be observed. The dimensions of this product are 150 by 50 cm and the thickness is 1 to 3 mm.