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High alloy high-temperature steel 20KH25N20S2 (ЭИ283) refers to a group of structural steel special purpose, which allows its use for the manufacture of parts operating at temperatures up to 1100 °C in corrosive industrial atmosphere. Thanks to the optimal technological and operational parameters such material to cope with the heavy work and actively oppose the influence of the most extreme industrial factors, providing reliability and durability of the equipment.


The percentage of Nickel in the alloy can range from 18% to 21%. To increase the operating parameters material legarrette additives of molybdenum, vanadium, tungsten, titanium, silicon, and some others.

Percentage composition according to GOST 5632−72
Alloy With Mn Cu P S Ni V Cr Si Ti Mo W Fe
20KH25N20S2 ≤0.2 ≤1,5 ≤0.3 mm ≤0.035 ≤0.02 18−21 ≤0,2 24−27 2−3 ≤2 ≤0.3 mm ≤0,2 the rest

20KH25N20S2 steel is smelted in open electric arc furnaces. Manufacture of semi-finished products normalized following GOST: 1133−71, 5582−75, 5949−75, 4405−75, 14955−77, 2590−2006, 2591−2006, 7417−75, 4405−75, 8559−75. As well as the following: 14−1-5350−97, 14−1-5361−98,14−11−245−88.


Heat-resistant steel 20KH25N20S2 designed for the production of elements of high heat resistance, working under high temperature up to 1100 °C, parts of furnaces operating in the hydrocarbon and air atmosphere, teplyh screens, furnace rollers, supports and suspensions boilers, etc.

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Our site offers a wide range of products from steels for special purposes. High quality of products and lack of intermediaries determine the most favorable conditions for their acquisition for solving current production problems. Delivery in the shortest possible time in any region of the country and abroad, compliance with regulatory documentation already gained the trust of regular customers. Due to the relatively low cost and wide model range, semi-finished products of the brand 20KH25N20S2 enjoyed continued popularity in all spheres of production.