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 |