20KH2N4A - 20cr2ni4a - 20h2n4a round, rod, forging
Supplier — AvekGlob Company — offers at a reasonable price from the manufacturer a circle, bars, which are made of steel grade 20Х2Н4А (20Сr2Ni4а, 20h2n4a). The supplier guarantees the timely delivery of products to any address specified by the consumer /
Carbon steel grade 20Х2Н4А (the nearest foreign analogues are steel 20Сr2Ni4а, 20h2n4a) is a structural steel alloyed with chromium and nickel, with a reduced content of impurities. In the United States is produced under the name SAE 3120. The presence of refractory metals in the steel provides an increase in its strength characteristics at elevated temperatures. The material is well suited for cementation, as a result of which surface hardness and wear resistance are combined with a sufficiently viscous core.
Urgency of application
Steel grade 20Х2Н4А (20Сr2Ni4а, 20h2n4a) is widely used for the manufacture of parts, the durability of which is determined by high wear resistance at moderate operating loads. Durability is provided provided that the lubricating surfaces are heavily lubricated. Typical applications are the guiding assemblies of metal cutting machines, as well as large gears and gears operating under reversible loads.
According to the technical requirements of GOST 4543−91, 20Х2Н4А steel includes the following elements (numerical data — in percent):
|0.16 — 0.22||0.17 — 0.37||0.3 — 0.6||3.25 — 3.65||to 0.025||to 0.025||1.25 — 1.65||up to 0.3|
Physical and mechanical properties
- density, kg / m 3 — 7960;
- melting point, 0 С -1610;
- coefficient of thermal expansion in the temperature range 20… 100 0 С, μm / deg — 13,2;
- specific heat, J / grad — 506;
- modulus of elasticity, GPa — 207;
- coefficient of thermal conductivity in the temperature range 20… 100 0 С, W / mgrad — 33,3;
- Brinell hardness, НВ — 241;
- limit of temporary resistance, MPa — 1270;
- yield strength, MPa — 1130;
- permissible tensile elongation,% — 10.
Assortment and application features
The circle and rod of alloyed chromium-nickel steel 20Х2Н4А (20Сr2Ni4а, 20h2n4a) are produced in a wide range of cross-sections and configurations. Mechanical machinability of steel is medium, weldability is poor. The material is sensitive to flock formation, but it is not very susceptible to brittleness after tempering. The temperature range of forging is 850… 1200 0 С.
Supplier — AvekGlob Company — offers to buy a bar or a circle of alloyed structural steel 20Х2Н4А (20Сr2Ni4а, 20h2n4a) in the necessary 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.