20ГС steel is used: for the manufacture of forgings of various parts of General machinery; shafts of hydraulic turbines, large parts, General engineering; reinforcing steel classes At600, At600c, At600k, At800, At1000 and At1000k, designed for conventional reinforcement and prestressed concrete structures.

Note

Steel low alloy structural manganese.

Standards

Name	Code	Standards
Bars and shapes	В22	GOST 10884-94, TU 14-2-949-91, TU 14-1-5254-94
Processing of metals by pressure. Forgings	В03	GOST 8479-70, OST 108.236.01-86, TU 108.11.931-87, TU 302.02.173-93, TU 108.11.917-87, ST ЦКБА 010-2004

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	As
GOST 10884-94	0.17-0.22	≤0.04	≤0.04	1-1.5	≤0.3	1-1.5	≤0.3	Rest	≤0.3	≤0.08
TU 108.11.917-87	0.16-0.22	≤0.02	≤0.03	1-1.3	≤0.3	0.6-0.8	≤0.3	Rest	≤0.3	-

Fe is the basis.
According to TU 108.11.917-87, after processing the steel on the OSRV, a limitation on the sulfur content ≤ 0.015% and phosphorus ≤ 0.015% is introduced. The total content of sulfur and phosphorus after OSRV ≤ 0.020%.
According to GOST 10884-94 in steel, intended for the production of reinforcing steel classes AT600, AT600C, At600K and At800, it is possible to increase the mass fraction of sulfur and phosphorus to 0.045%.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %
Reinforcing steel in the delivery state according to GOST 10884-94 (the Holy column of the delivery condition specified strength grade and temperature of electrical heating)
10-32	≥1000	≥1250	≥7
10-40	≥600	≥800	≥12
10-32	≥800	≥1000	≥8

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

Technological properties

Name	The value
Weldability	Welded without any restrictions.

Steel 20ГС

Designation

Description