Steel 10Х12Н20Т2 (ЭП452)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
10Х12Н20Т2 |
| Designation GOST Latin |
10X12H20T2 |
| Transliteration |
10H12N20T2 |
| The chemical elements |
10Cr12Н20Ti2 |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП452 |
| Designation GOST Latin |
EP452 |
| Transliteration |
EhP452 |
| The chemical elements |
- |
Description
10Х12Н20Т2 steel is used: for the manufacture of high-quality and sheet hire, pipes and tubes; parts and piping systems of aerospace engineering; elements of power engineering.
Note
high-temperature steel corrosion resistant Nickel.
Standards
| Name |
Code |
Standards |
| Bulls. Blanks. Slabs |
В31 |
OST 1 90163-74, TU 14-1-1214-75, TU 14-1-4079-86 |
| Sectional and shaped rolling |
В32 |
TU 14-1-1730-76 |
| Sheets and stripes |
В33 |
TU 14-1-4515-88, TU 14-1-947-74 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Al |
Ti |
| TU 14-1-1730-76 |
≤0.1 |
≤0.015 |
≤0.025 |
≤0.6 |
10-12.5 |
≤0.6 |
18-21 |
The rest |
≤0.5 |
2.3-2.8 |
Fe is the basis.
According to TU 14-1-1730-76 and TU 14-1-4079-86, the chemical composition is given for steel grade 10Х12Н20Т2-Ш (ЭП452-Ш). The additive of cerium or zirconium is not more than 0,050% by calculation, which are not determined by chemical analysis. Provided that all the requirements of technical specifications are satisfied in the finished rolled products, the titanium deviation is allowed to be +0.10%.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
Brinell hardness number, MPa |
| Bars hot rolled and forged on the other 14-1-1730-76. Quenching in oil with 990-1010 °C (extract 2-3 h) + Aging at 700-780 °C (extract 10-25 h), air cooling |
|
≥520 |
≥883 |
≥20 |
≥35 |
≥490 |
229-321 |
|
- |
≥589 |
≥8 |
≥11 |
- |
- |
| Tubular billet on the other 14-1-4079-86. Quenching in oil with 990-1010 °C (exposure 2 hours) + Aging at 690-710 °C (exposure for 10 h), air cooling |
| 20-25 |
≥520 |
≥880 |
≥20 |
- |
- |
- |
| 20-25 |
- |
≥740 |
≥10 |
- |
- |
- |
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 bars on the other 14-1-1730-76 must be without voids, cracks, cracks, delamination, rough pores and slag inclusions visible to the naked eye. The macrostructure of billets on the other 14-1-4079-86 should not have shrinkage porosity, bubbles, cracks, inversions, crusts, inclusions, visible without using the magnifying devices. The defects allowed must not exceed: - for Central porosity - 1.0 points; - point heterogeneity - 1.0 points; - exudation on the square - 1.0 points. In the tube blank, the nitrides and carbonitrides, the actual results recorded in the certificate of quality. |
| Features of production |
Bars on the other 14-1-1730-76 are supplied without heat treatment. |
