Steel 13Х9М (Х9М)

Designation

Name The value
Designation GOST Cyrillic 13Х9М
Designation GOST Latin 13X9M
Transliteration 13H9M
By chemical elements 13Cr9Mo
Name The value
Designation GOST Cyrillic Х9М
Designation GOST Latin X9M
Transliteration H9M
By chemical elements Cr9Mo

Description

13Х9М steel is used: for the manufacture of stoves and communication of pipes used in power and heat networks; of billets intended for production of tubes of the cracking units of oil refining.

Note

From 01.01.1991 steel is not allowed for use in new and retrofit techniques (see TU 14−1-583−73).

Standards

Name Code Standards
Blanks. Of the workpiece. Slabs В31 TU 14-1-583-73
Steel pipes and fittings to them В62 TU 14-3-457-76

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Mo
TU 14-3-457-76 0.09-0.15 ≤0.025 ≤0.035 ≤0.5 7.5-9.5 ≤0.5 ≤0.5 Rest ≤0.25 0.9-1.1
Fe is the basis.
According to TU 14-1-583-73, TU 14-3-457-76 the chemical composition is given for steel grade 13X9M. In the finished rolled products, deviations in chemical composition are allowed in accordance with GOST 20072.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % d10 y, % KCU, kJ/m2 HB, MPa
Tubular billet on the other 14-1-583-73 after annealing
≥215 ≥470 ≥22 - ≥55 ≥981 ≤170
Pipe kiln and communication in the delivery condition on the other 14-3-457-76 (impact strength is specified for tubes with wall thickness ≥ 12 mm and is determined for longitudinal samples)
≥216 ≥470 ≥22 ≥10 ≥50 ≥980 ≤170

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
d10 Elongation after rupture
y The relative narrowing
KCU Toughness
HB Brinell hardness number

Technological properties

Name The value
Macrostructure and pollution The macrostructure of billets, check for the etched cross templeto should not have shrinkage looseness, bubbles, delaminations, voids, cracks, inclusions and placenow visible without using the magnifying devices. The defects allowed on a point inhomogeneity, the Central porosity and segregation must not exceed 2 points (for each species), subcortical bubbles at 1 point at a depth of less than 2 mm.