|Designation GOST Cyrillic||25Х3МФА-А|
|Designation GOST Latin||25X3MFA-A|
|By chemical elements||25Cr3MoVN-|
Steel 25Х3МФА 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.
|Blanks. Of the workpiece. Slabs||В31||TU 108.131-86|
According to TU 108.131-86 the chemical composition is given for steel grade 25X3MFA. In the chemical composition, deviations are allowed: for carbon -0.010%, for manganese, silicon, and vanadium ± 0.050% for 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.
|Section, mm||sT|s0,2, MPa||σU, MPa||d5, %||y, %||KCU, kJ/m2||HB, MPa|
|Billet heat-treated in the delivery condition on the other 108.131-86|
Description mechanical marks
|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|
|HB||Brinell hardness number|