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Steel 18Х2МФА-

Designation

Name The value
Designation GOST Cyrillic 18Х2МФА-А
Designation GOST Latin 18X2MFA-A
Transliteration 18H2MFA-A
The chemical elements 18Cr2MoVN-

Description

Steel 18Х2МФА AND used: for the production of workpieces in the form of forgings, sheets, sheet blanks, the sheet of stamped blanks, Cavanaugh-rolled billets (slabs), used for products of machinery and vessels, working under pressure and within the jurisdiction of the Gosatomenergonadzor.

Standards

Name Code Standards
Bulls. Blanks. Slabs В31 TU 108.131-86

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu As V Mo Sn Sb Co
TU 108.131-86 0.16-0.21 ≤0.015 ≤0.012 0.3-0.6 2.5-3 0.17-0.37 ≤0.4 The rest ≤0.1 ≤0.01 0.25-0.35 0.6-0.8 ≤0.005 ≤0.005 ≤0.025
Fe is the basis.
According to TU 108.131-86 the chemical composition is given for steel grade 18X2MFA-A. In the chemical composition, deviations are allowed: carbon ± 0.010%, manganese, silicon, and vanadium ± 0.050% each, chromium ± 0.10%. In steel, the total content of phosphorus, antimony, and tin should not be more than 0.015%. Additional determination of the content of zinc, lead and bismuth is carried out. The results of the determination are not delivery, but are recorded in the certificate.

Mechanical characteristics

Section, mm sT|s0,2, MPa σB, MPa d5, % y, % kJ/m2, кДж/м2 Brinell hardness number, MPa
Billet heat-treated in the delivery condition on the other 108.131-86
160-400 ≥430 540-735 ≥14 ≥50 ≥490 187-229
160-400 ≥390 ≥490 ≥14 ≥50 - -
160-400 ≥430 540-735 ≥14 ≥50 ≥490 187-229
160-400 ≥390 ≥490 ≥14 ≥50 - -

Description mechanical marks

Name Description
Section Section
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σB Limit short-term strength
d5 Elongation after rupture
y The relative narrowing
kJ/m2 Toughness

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