Steel 20G2

Designation

Name The value
Designation GOST Cyrillic 20Г2
Designation GOST Latin 20G2
Transliteration 20G2
By chemical elements 20Mn2

Description

Steel 20G2 is used: for the production of tooling durability operating under moderate and significant pressures without heating the cutting edge; the wire intended for the manufacture of rivets and bolts by cold heading.

Standards

Name Code Standards
Bars and shapes В32 GOST 10702-78
Sheets and strips В33 TU 14-1-1035-74
Steel wire medium and high carbon В72 TU 14-4-385-73

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu
GOST 10702-78 0.18-0.26 ≤0.035 ≤0.035 1.3-1.6 ≤0.25 0.17-0.37 ≤0.25 Rest ≤0.2
TU 14-4-385-73 0.18-0.26 ≤0.035 ≤0.035 1.3-1.6 ≤0.25 0.17-0.37 ≤0.25 Rest ≤0.2
Fe is the basis.

Mechanical properties

Section, mm σU, MPa d5, % HB, MPa
Hot-rolled steel and hot rolled with special surface finish
- - - ≤187
Steel calibrated and calibrated with special surface finish
- 490-690 - -
- - - ≤197
- - - ≤197
Wire on the other 14-4-385-73 in the delivery condition. Subanguina with pre-annealing to granular pearlite
490-687 ≥10 -

Description mechanical marks

Name Description
σU Limit short-term strength
d5 Elongation after rupture
HB Brinell hardness number