Steel АЦ28ХГН2АФБ
Designation
| Name |
The value |
| Designation GOST Cyrillic |
АЦ28ХГН2АФБ |
| Designation GOST Latin |
ATs28XGH2AFB |
| Transliteration |
ATs28HGN2AFB |
| The chemical elements |
- |
Description
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.
Note
Steel high strength high workability.
Standards
| Name |
Code |
Standards |
| Sectional and shaped rolling |
В32 |
TU 14-1-4495-88 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
N |
Al |
V |
Nb |
Ca |
Sr |
| TU 14-1-4495-88 |
0.24-0.34 |
≤0.035 |
≤0.035 |
1-1.3 |
0.8-1.1 |
0.2-0.4 |
2-2.5 |
The rest |
≤0.35 |
0.005-0.03 |
0.02-0.05 |
0.09-0.15 |
0.01-0.03 |
0.003-0.02 |
0.001-0.003 |
Fe is the basis.
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.
Mechanical characteristics
| Section, mm |
t отпуска, °C |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
Brinell hardness number, 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 |
| 25 |
67030 |
≥635 |
≥800 |
≥17 |
≥55 |
≥780 |
241-260 |
| 25 |
64030 |
≥780 |
≥910 |
≥14 |
≥50 |
≥390 |
286-321 |
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 |
Technological properties
| Name |
The value |
| Macrostructure and contamination |
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. |
| Features of production |
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. |
