Supplier — AvekGlob Company — offers at a reasonable price from the manufacturer a circle, bars, which are made of structural steel grade 18H2N4VA (18CrNiMo7−6, 17CrNiMo6, 17hnm). The supplier guarantees the timely delivery of products to any address specified by the consumer /

Technical specifications

Low-carbon steel 18X2N4VA (the nearest foreign analogues are steel 18CrNiMo7−6, 17CrNiMo6, 17hnm) is a structural steel alloyed with chromium, nickel and vanadium (in foreign analogs vanadium is replaced by molybdenum). Refers to heat-strengthened steels of increased toughness. Good for carburizing. Steel is characterized by increased isotropy, in particular, it is distinguished by the absence of sulfide inclusions and inclusions of bound oxygen, increasing brittleness. In connection with this, the steels under consideration are distinguished by good fatigue strength under the conditions of the action of alternating loads.

Urgency of application

Of the 18X2N4VA (18CrNiMo7−6, 17CrNiMo6, 17hnm) steel grades, parts are produced that function under alternating loads, and under the condition of constant mechanical sliding friction. Typical products are contact bushings, bearing housings, sprockets, cogwheels and gears operating under reversible forces, shafts. Steel can also be used for high-strength applications without cementation, but in a quenched state.

Chemical composition

According to the technical requirements of GOST 4543−91, 18Х2Н4ВА steel comprises the following elements (numerical data — in percent):

Physical and mechanical properties

• density, kg / m ³ — 7800;
• melting point, ⁰ С -1500;
• coefficient of thermal expansion in the temperature range 20… 100 ⁰ С, μm / deg — 10,6;
• Specific heat, J / grad — 496;
• modulus of elasticity, GPa — 211;
• coefficient of thermal conductivity in the temperature range 20… 100 ⁰ С, W / megade — 38;
• Brinell hardness, НВ — 229;
• the limit of the temporary resistance, MPa — 980… 1110;
• yield strength, MPa −730… −880;
• Relative narrowing of the cross-sectional area. % — 50… 55;
• permissible tensile elongation,% — 10… 15.

Assortment and application features

Circle and rod of medium alloy structural steel 18Х2Н4ВА (18СrNiMo7−6, 17CrNiMo6, 17hnm) are produced in a wide range of cross-sections and length. Mechanical machinability and weldability are good (with the exception of products subjected to chemical-thermal treatment). The material is sensitive to flock formation, but slightly increases brittleness after tempering. The temperature range of forging is 800… 1200 ⁰ С.

Supplier — AvekGlob Company — offers to buy a bar or a circle of medium alloy structural steel 18Х2Н4ВА (18СrNiMo7−6, 17CrNiMo6, 17hnm) in the required assortment of cross sections and length. 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.