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20KHGNM - 20NiCrMo2-2 - aisi 8620 round, rod, forging

20KHGNM - 20NiCrMo2-2 - aisi 8620 round, rod, forging

Supplier — AvecGlob Company — offers at a reasonable price from the manufacturer a circle, rods, forgings, which are made of steel grade 20ХГНМ (20NiСrMo2−2, AISI 8620). The supplier guarantees the timely delivery of products to any address specified by the consumer.

Technical specifications

Low-carbon steel grade 20ХГНМ (the nearest foreign analogues — steel 20NiСrMo2−2, AISI 8620) is a cemented structural steel that contains an increased percentage of manganese, and also is doped with chromium, molybdenum and nickel. In Western Europe it is produced in accordance with DIN EN 1.6523. The presence in the steel of refractory metals increases its mechanical strength at elevated temperatures. The presence of an increased percentage of manganese reduces the plasticity of the metal. Steel is amenable to cementation, after which it acquires a high resistance to wear.

Urgency of application

Steel grade 20ХГНМ (20NiСrMo2−2, AISI 8620) is widely used in mechanical transmissions of ships, ground vehicles, aircraft, guided missiles, weapon systems. The use of this steel has a special effect in railway transport, in the construction of roads, bridges, pressure vessels, machine tools, and other mechanical devices that have significant dimensions and / or cross sections. In the power industry, the reference steels for turbine boilers, especially critical fasteners, shafts operating in reversible modes, gears and gears of increased durability, responsible rods, etc., are produced from the considered steel grades.

Chemical composition

According to the technical requirements of GOST 4543−91, the following elements are included in steel 20ХГНМ (numerical data — in percent):

C Si Mn Ni S P Cr Cu Mo
0.18 — 0.23 0.17 — 0.37 0.7 — 1.1 0.4 — 0.7 up to 0.035 up to 0.035 0.4 — 0.7 up to 0.3 0.15−0.35

Physical and mechanical properties

  • density, kg / m 3 — 7820;
  • melting point, 0 С -1600;
  • coefficient of thermal expansion in the temperature range 20… 100 0 С, μm / deg — 10,5;
  • specific heat, J / ggrad — 508;
  • modulus of elasticity, GPa — 210;
  • coefficient of thermal conductivity in the temperature range 20… 100 0 С, W / megade — 38;
  • Brinell hardness, НВ — 241;
  • limit of temporary resistance, MPa — 1180… 1270 (depending on the heat treatment regime);
  • yield strength, MPa — 900… 1040 (depending on the heat treatment mode);
  • permissible tensile elongation,% — 7… 8.

Assortment and application features

The circle, rods and forgings made of alloy steel 20ХГНМ (20NiСrMo2−2, AISI 8620) are produced in a wide range of cross-sections and configurations. Mechanical machinability of steel is medium, weldability is satisfactory. At room temperatures, the plasticity of steel is limited only by the separation operations. The temperature range of forging is 800… 1220 0 С.

Supplier — AvekGlob Company — offers to buy bar, round or forgings from low-carbon structural steel 20ХГНМ (20NiСrMo2−2, AISI 8620) in the required assortment of cross-sections, weight and configuration. Products can be bought at a price formed on the basis of European and world standards of production. Implementation is possible in bulk and retail, for regular customers, a flexible system of discounts operates.