20s - 20Cr4 - 20h round, rod, forging
Supplier — AvekGlob Company — offers at a reasonable price from the manufacturer a circle, rods, forgings, which are made of steel grade 20Х (20Сr4, 20h). The supplier guarantees the timely delivery of products to any address specified by the consumer.
Low-carbon steel grade 20X (the nearest foreign analogues — steel 20Cr4, 20h) is a structural steel, alloyed with chromium. Steel is not inclined to intercrystalline corrosion, it is characterized by very high ductility under hot and cold pressure treatment, suitable for the production of prefabricated metal structures of complex shapes. The material has a hardenability — medium. This steel has good heat resistance and wear resistance at medium and high slip speeds.
Urgency of application
Due to its good machinability, wear and heat resistance, 20X (20Cr4, 20h) steel is used in automatic lathe production of high-strength bolts and nuts, it is used in building metal structures of increased strength, in railway transport units, conveyor steel belts, fittings, domestic boiler components and heat exchangers, as well as for the manufacture of other parts, the operational durability of which is determined by high surface hardness with a relatively viscous heart eveene.
According to the technical requirements of GOST 4543−91, the following elements are included in steel 20X (numerical data — in percent):
|0.17 — 0.23||0.17 — 0.37||0.5 — 0.8||Up to 0.3||up to 0.035||up to 0.035||0.7 — 1.1||up to 0.3|
Physical and mechanical properties
- density, kg / m 3 -7830;
- melting point, 0 С -1470;
- coefficient of thermal expansion in the temperature range 20… 100 0 С, μm / deg — 10,5;
- Specific heat, J / grad — 496;
- modulus of elasticity, GPa — 213;
- coefficient of thermal conductivity in the temperature range 20… 100 0 С, W / mgrad — 42;
- Brinell hardness, НВ — 229;
- limit of time resistance, MPa — 440… 780 (depending on the assortment);
- yield strength, MPa — 320… 485 (depending on the assortment);
- permissible tensile elongation,% — 11… 18.
Assortment and application features
The circle, rods and forgings made of 20Х alloy steel (20Сr4, 20h) are manufactured in a wide range of cross-sections and configurations. Mechanical machinability and weldability are good. Steel is not prone to flocculation and to a decrease in plasticity after tempering. The temperature range of forging is 820… 1200 0 С.
Supplier — AvekGlob company — offers to buy a bar, circle or forgings from low-carbon structural steel 20Х (20Сr4, 20h) 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.