Steel A

Designation

Name	The value
Designation GOST Cyrillic	А
Designation GOST Latin	A
Transliteration	A
By chemical elements	-

Description

A steel 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
GOST 5521-93	≤0.21	≤0.04	≤0.04	0.4-1	≤0.3	0.15-0.35	≤0.4	Rest	≤0.35	≤0.008	≤0.08

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%. 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	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %
Rental in the state of delivery according to GOST 5521-93
	≥235	400-490	≥22

Description mechanical marks

Name	Description
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	Limit short-term strength
d₅	Elongation after rupture