Steel B

Designation

Name The value
Designation GOST Cyrillic B
Designation GOST Latin B
Transliteration B
By chemical elements B

Description

Steel B is used: for the production of plate, universal broadband, bandpass and shaped rolled, intended for the manufacture of shells and other welded structures of ships and floating structures.

Note

Steel normal strength.

Standards

Name Code Standards
Sheets and strips В23 GOST 5521-93, TU 14-1-4264-87

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu N As Al
GOST 5521-93 ≤0.21 ≤0.04 ≤0.04 0.6-1 ≤0.3 0.15-0.35 ≤0.4 Rest ≤0.35 ≤0.008 ≤0.08 0.015-0.06
Fe is the basis.
According to GOST 5521-93, the mass fraction of nitrogen is allowed up to 0.012%, provided that KCU ≥ 294 kJ / m 2 is provided in the rolled product after mechanical aging at 20 ° C. The mass fraction of manganese is allowed up to 1.40%. Total mass fraction C% + Mn / 6% ≤ 0,40%. It is allowed in place of aluminum soluble in acids, to determine its total mass fraction, while the rate increases by 0.005%. Partial replacement of aluminum with titanium is allowed: the total mass fraction of aluminum and titanium should be at least 0.015%, the mass fraction of titanium - not more than 0.020%, the mass fraction of aluminum soluble in acids - not less than 0.005%. The microalloying of niobium and (or) vanadium steel to 0.05 and 0.10%, respectively, or other grain refining admixtures is permitted in agreement with the consumer.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, %
Rental in the state of delivery according to GOST 5521-93
≥235 400-490 ≥22

Description mechanical marks

Name Description
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU Limit short-term strength
d5 Elongation after rupture