|Designation GOST Cyrillic||АЦ28ХГН2АФБ|
|Designation GOST Latin||ATs28XGH2AFB|
|By chemical elements||-|
АЦ28ХГН2АФБ steel is used: for the production of bars in high precision, used for the manufacture of sucker rods and other highly loaded parts of oil production equipment; wellhead rods for connection of the column of sucker rods from the pumping unit in oil sucker-rod pumps.
Steel high strength high workability.
|Bars and shapes||В32||TU 14-1-4495-88|
According to TU 14-1-4495-88, deviations from the norms of chemical composition in accordance with GOST 4543: niobium +0.005%, nitrogen +0.002% are allowed in finished rolled steel provided that the requirements of TU 14-1-4495-88 on mechanical properties are fulfilled. Calcium and strontium are administered with a complex ligation according to calculation and chemical or other analysis does not determine.
|Section, mm||t отпуска, °C||sT|s0,2, MPa||σU, MPa||d5, %||y, %||KCU, kJ/m2||HB, MPa|
|Bars high precision in the delivery condition on the other 14-1-4495-88. Normalization at 900±15 °C, air cooling + Vacation, air cooling|
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|
|Macrostructure and pollution||The macrostructure of rolled on the other 14-1-4495-88 should not have residues shrinkage, podnasadochnogo looseness, bubbles, cracks, placenow. Obesplozhennym layer on the surface of bars is not allowed.|
|Particularities of production of goods||Bars on the other 14-1-4495-88 are supplied in a normalized (air cooling with temperature end of rolling) of vacation. Depending on the hardness of the bars is divided into 2 groups of hardness - see Table mechanical properties.|