SU502973A1 - Structural steel - Google Patents

Description

one

The invention relates to the field of ferrous metallurgy, namely, to the production of low alloy steels and can be used, for example, for the manufacture of metal structures where welding is necessary.

Known structural steel containing, wt. %:

0.02-0.21 0.1-3.0 0.6-3.0

0.03-0.16 0.015-0.05 To 0.01

0.01-2.0 Else

The purpose of the invention is to save scarce materials and reduce the cost of steel.

This is achieved by the fact that the proposed steel additionally contains boron. In addition, the carbon content in the steel is increased and the components are taken in the following ratio.

Carbon

0.30-0.43 0.8-1.50 Manganese

1.0-0.3

0.08-0.14

0.015-0.030

0.001-0.007

0,005-0,050

0,005-0,050

Rest

Additional doping with boron and an increase in the carbon content makes it possible to exclude the deficient nickel element from the steel composition, while maintaining the mechanical properties of the steel at the same level. At the same time, the cost of steel is reduced by more than 30%.

The mechanical properties of the proposed (I) known (II) steel are listed below:

and

P

Strength, kg / mm 66-71,8

65 45 Yield strength, kg / mm246-51 Relative elongation,% 20-21

20 Impact viscosity, kgm / cm 8-10

Claims (1)

Invention Formula Structural steel containing carbon, chromium, nitrogen, manganese, silicon, sulfur, phosphorus and iron, characterized in that, in order to save scarce materials and reducing the cost of steel, the steel additionally contains boron, and the components are taken in the following ratio, weight. %: Carbon0.30-0.43 Manganese 0.8-1.50 Chrome1.0-0.3 0.08-0.14 0.015-0.030 0.001-0.007 0.005-0.050 0.005-0.050 Rest