Steel 12KH21N5G2STL

Designation

Name The value
Designation GOST Cyrillic 12Х21Н5Г2СТЛ
Designation GOST Latin 12X21H5G2CTL
Transliteration 12H21N5G2STL
By chemical elements 12Cr21Н5Mn2СTi

Description

12KH21N5G2STL steel is used: for the manufacture of castings to various industrial purpose.

Note

Steel corrosion resistant austenitic-ferritic class. Steel corrosion in air, nitric acid, very dilute sulfuric acid and dilute or weak organic acids, more resistant to intergranular corrosion than steel 10KH18N9L.

Standards

Name Code Standards
Steel castings В82 GOST 977-88

Chemical composition

Standard C S P Mn Cr Si Ni Fe
GOST 977-88 ≤0.12 ≤0.035 ≤0.045 ≤2 20-22 ≤1.5 4.5-6 Rest
Fe is the basis.
According to GOST 977-88, the titanium content should be in the range of Ti = 4 · C% to 0.70%. It is allowed to use niobium and tantalum in the amount of 8 · C% to 1.20% instead of titanium for stabilization.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d y, % KCU, kJ/m2
Casting. Quenching in water or air from 1050-1100 °C
100 ≥343 ≥549 ≥12 ≥10 ≥196

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
d Elongation after rupture
y The relative narrowing
KCU Toughness