Steel 20ГС

Designation

Name The value
Designation GOST Cyrillic 20ГС
Designation GOST Latin 20GC
Transliteration 20GS
By chemical elements 20MnС

Description

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 sT|s0,2, MPa σU, 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
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

Technological properties

Name The value
Weldability Welded without any restrictions.