Steel 50Х4Г18

Designation

Name The value
Designation GOST Cyrillic 50Х4Г18
Designation GOST Latin 50X4G18
Transliteration 50H4G18
By chemical elements 50Cr4Mn18

Description

50Х4Г18 steel is used: for the manufacture of retaining rings of turbogenerators and other parts of the engineering requirements of namagnichennosti.

Note

The austenitic steel.
Absolute magnetic permeability at field strength of 1.6·104 A/m (200Э) must not exceed 1.4 x 10-6 Ng/m (1,1 GS/e).
Electrical resistivity shall not be less than 0,65·10-6 Ohm·m (0.65-Ohm·mm2/m).

Standards

Name Code Standards
Processing of metals by pressure. Forgings В03 TU 24.00.3748-85

Chemical composition

Standard C S Mn Cr Si Ni Fe Cl
TU 24.00.3748-85 0.4-0.55 ≤0.025 17-19 3-4 0.2-0.8 ≤0.5 Rest ≤0.05
Fe is the basis.

Mechanical properties

sT|s0,2, MPa σU, MPa d5, % y, %
The workpiece retaining ring - selection of samples for testing wall thickness 58-85 mm (strength category - I to V)
588 735 25 35
706 834 22 35
785-834 883-932 20 35
834-883 912-961 20 35
863-981 912-1040 20 35

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
y The relative narrowing