Steel 13Х13С2М2 (ЭИ852)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
13Х13С2М2 |
| Designation GOST Latin |
13X13C2M2 |
| Transliteration |
13H13S2M2 |
| The chemical elements |
13Cr13С2Mo2 |
| Name |
The value |
| Designation GOST Cyrillic |
ЭИ852 |
| Designation GOST Latin |
EI852 |
| Transliteration |
EhI852 |
| The chemical elements |
- |
Description
13Х13С2М2 steel is used: for the manufacture of bars; billets; and electropolishing extremely thin-walled pipes used in the manufacture of parts and equipment for the chemical, energy and nuclear engineering.
Note
Steel of ferrite-martensitic type.
Standards
| Name |
Code |
Standards |
| Bulls. Blanks. Slabs |
В31 |
TU 14-1-1401-75, TU 14-1-1992-76 |
| Sectional and shaped rolling |
В32 |
TU 14-1-1889-76 |
| Pipes steel and connecting parts to them |
В62 |
TU 14-3-1179-83, TU 14-3-258-74, TU 14-3-791-78, TU 14-3-882-79 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Mo |
| TU 14-1-1401-75 |
0.1-0.15 |
≤0.02 |
≤0.03 |
≤0.6 |
12-14 |
1.4-2.1 |
≤0.3 |
The rest |
1.2-2 |
| TU 14-1-1992-76 |
0.1-0.15 |
≤0.015 |
≤0.02 |
≤0.6 |
12-14 |
1.4-2.1 |
≤0.3 |
The rest |
1.2-2 |
Fe is the basis.
According to TU 14-1-1401-75, the chemical composition is presented for steel grade 13X13M2S2 (EI852).
According to TU 14-1-1992-76 the chemical composition is presented for steel grade 13Х13М2С2-Ш (ЭИ852-Ш). The deviation in nickel is +0.10%.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
| Tubular billet on the other 14-1-1401-75 the 14-1-1992-76. Quenching in water from 1050-1070 °C + Vacation at 720-740 °C (aging of 1.0-1.5 h), air cooling |
| 20-25 |
≥255 |
≥539 |
≥20 |
≥56 |
| 20-25 |
- |
≥323 |
≥15 |
≥50 |
| 20-25 |
- |
≥638 |
≥20 |
- |
| 20-25 |
≥167 |
≥196 |
≥25 |
- |
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 |
Technological properties
| Name |
The value |
| Pressure treatment |
Clan of the workpiece on the other 14-1-1992-76 determined by the ratio of the average cross section of the ingot to the billet must be at least 4.5 for ø 90-100 mm and not less than 3.0 to ø 105-110 mm. |
| Macrostructure and contamination |
The macrostructure of the steel on the other 14-1-1401-75 when checking for cross etched templeto should not have shrinkage looseness, cracks, bubbles, turns brown, inclusions and delaminations visible to the naked eye. Quality assessment of macrostructure is scored and must be: - on a point inhomogeneity ≤ 1.5 points; - the Central porosity ≤ 1.5 points; - phase separation in the square ≤ 2.0 points. Contamination of metal non-metallic inclusions should be (on the average score/maximum score): - sulphides With ≤ 2,0/3,0; - silicates SP ≤ 3,0/4,0; - silicates CX ≤ 3,0/5,0; - silicates SN ≤ 3,0/4,0; - oxides (OS, OT) ≤ 3,0/5,0. The macrostructure of the steel on the other 14-1-1992-76 in the delivery condition must have no cracks, gas bubbles, traces of shrinkage, inclusions and delaminations are visible to the naked eye. Layer-by-layer crystallization is not a rejection symptom. Under the control of the macrostructure on a cross templeto allowed: - on a point inhomogeneity ≤ 1.0 points; - the Central porosity ≤ 1.0 points; - phase separation in the square ≤ 1.0 points. Contamination of metal non-metallic inclusions should be (for maximum points): - sulphides With ≤ 1,0; - oxides of stroke OS ≤ 2,0; - oxides of point ≤ 2,0; - silicates fragile CX ≤ 2,0; silicates plastic SP ≤ 1,0; - silicates, non-deformed SN ≤ 1,0. The fragile silicates allows for a single attack with a score of no more than 3.0. |
| Features of production |
Bars of billets on the other 14-1-1401-75 are supplied in the annealed and peeled condition. The purity of roughing the surface should correspond to the 3 class according to GOST 2789 or agreed to by the parties, the standard of cleanliness of the surface with the heavy duty centerless grinding machines. |
