The steel pipe 20H25N20S2 brand is produced from complex alloys. The composition in accordance with GOST 5632−72 24−27% chromium, 18−21% nickel, 2−3% silicon. The alloy is doped with vanadium, tungsten, titanium and carbon — 0.2% manganese, copper and molybdenum — 0.3%, phosphorus thousandths lobes. Balance is iron. Since chromium and nickel are major alloying elements of chromium-nickel steel referred to. forging temperature 1170 ° C at the beginning and 850 ° C at the end of the process. Cooling is performed in air tube.
The percentage composition in accordance with GOST 5632−72
Heat resistance, corrosion resistance, including in an oxidative environment, aesthetic appeal. Due to nickel and chromium protective film on the surface of the pipes easily restores itself with minor injuries. The disadvantage is considered to be a tendency to temper brittleness.
Physical properties depending on temperature
|t °||Ex10 — 5||ax10 6||Thermal conductivity||Density|
|Degrees ° C||MPa||1 / Grad||W / (mxgrad)||g / cm 3|
E — first-order modulus of elasticity [MPa]
a — coefficient of thermal expansion
advantages allow use of the alloy tube 20H25N20S2 parts as high-temperature furnaces, furnace rollers, pipes and automotive exhaust gas exhaust tubes operating at temperatures up to 1100 ° C in an atmosphere saturated with both air and hydrocarbon. These pipes are used in construction for laying water pipe and electrical cable for the heat-resistant chimneys in private homes protecting the house from fire spontaneous combustion of soot. Sectional tubes with ground and polished surface are used in construction, for example, in the construction of advertising stands, decorative designs, outdoor staircases,
All products are certified 20H25N20S2 brand. The technical documentation includes data on the chemical composition, limiting the percentage of impurities; mechanical properties of products. We can buy in bulk, any semi-finished products for large-scale productions. We also offer optimal conditions for retail customers. High level of service and efficiency of service are the face of our company.
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In stock company «Electrovek-steel» always available products from stainless steel alloys for the best price. It is formed with European rates on non-ferrous metals without the inclusion of the additional costs. We supply certified products of domestic and foreign manufacturers. Cooperation with us gives a number of advantages. Our experts will be happy to provide advice when buying any alloys, the correct choice of which will depend on the performance and durability of the equipment. We will help you determine not only the optimum parameters of the product, but also offer the best price.