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We offer a metal sheet, welded pipe and seamless pipes, rods, flats.

Everything made of popular grades:

Norma Poland: H25N20S2, H20N12S2, H23N18, H13JS, H24JS, H6S2, H25T, H5M, H23N13.

Constantly

This resistance to oxidising gases at high temperatures. In most applications, components, machinery and parts, steel, alloys are cooled periodically and it is rare that they are exposed to continuous work for longer than 24 hours without adequate cooling process. To determine the fire resistance of the material applies a practical method: a sample of the steel heats up to a temperature of 24, then cooled down to a temperature of 20oC. This operation is repeated five times, then zgorzelina is removed from the surface and the material is weighed to determine the loss of mass.

Steel may be classified as high-temperature (the temperature) If, after the test loss of material which does not exceed 1 g (m2 x h) at a given temperature and if at 50 ° c of the higher loss in the material is less than 2 g (m2 x h)

It is the ability to transfer mechanical stresses at high temperatures, or the so-called resistance to creep. And so slow to change the shape of the material (deformation) as a result of solid, long-lasting heat strength alloy burden is the strength of the międzyatomowych bonds are larger and the greater strength of the alloy and the ad hoc. The strength of the bond międzyatomowych specifies the primarily melting point-the melting point of the alloy is higher, the heat strength should also be higher.

Provides fire resistance steel alloy additives: chromium, aluminium, Silicon, that form on the surface of the oxide material, make it difficult to further oxidation. Heat strength is achieved by alloying element molybdenum, vanadium, tungsten, titanium, cobalt, chromium, Silicon, which increase the binding energy of the atoms.

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