Steel Х12Н20Т2Р (ЭИ696А)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
Х12Н20Т2Р |
| Designation GOST Latin |
X12H20T2P |
| Transliteration |
H12N20T2R |
| The chemical elements |
Cr12Н20Ti2B |
| Name |
The value |
| Designation GOST Cyrillic |
ЭИ696А |
| Designation GOST Latin |
EI696A |
| Transliteration |
EhI696A |
| The chemical elements |
- |
Description
Х12Н20Т2Р steel is used: for the production of cold-rolled strips; welding wire used for welding parts and welding of steel structures in energy engineering; welding electrodes.
Standards
| Name |
Code |
Standards |
| Bulls. Blanks. Slabs |
В21 |
OST 1 90176-75 |
| Sheets and stripes |
В33 |
TU 14-1-146-71 |
| Tapes |
В34 |
TU 14-1-927-74 |
| Welding and cutting of metals. Soldering, riveting |
В05 |
TU 14-1-997-74 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
Al |
B |
Ti |
| TU 14-1-997-74 |
≤0.1 |
≤0.02 |
≤0.03 |
≤1 |
10-12.5 |
≤0.8 |
18-21 |
The rest |
≤0.2 |
≤0.5 |
≤0.008 |
2.3-2.8 |
| TU 14-1-927-74 |
≤0.1 |
≤0.02 |
≤0.03 |
≤1 |
10-12.5 |
≤1 |
18-21 |
The rest |
≤0.2 |
≤0.5 |
≤0.008 |
2.3-2.8 |
Fe is the basis.
According to TU 14-1-927-74, boron and deoxidizers (cerium, calcium, barium) are introduced into the metal by calculation and chemical analysis is not determined. Under the agreement between the consumer and the manufacturer, steel is supplied with a calculated boron content of 0.003-0.005%.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
Brinell hardness number, MPa |
| Steel hot-rolled sheet (6-11 mm). Quenching in water, in air or under water shower with 1020-1040 °C + aging at 710-730 °C (exposure 8 h), air cooling |
|
≥588 |
≤980 |
≥20 |
- |
- |
- |
| Cold-rolled steel strip of 0.2-1.2 mm on the other 14-1-927-74. Quenching in water or air with 1020-1060 °C |
| - |
- |
≤735 |
≥30 |
- |
- |
- |
| Steel hot-rolled sheet (6-11 mm). Quenching in water, in air or under water shower with 1020-1040 °C |
|
- |
≤735 |
≥35 |
- |
- |
- |
| Steel hot-rolled sheet (6-11 mm). Quenching in water, in air or under water shower with 1020-1040 °C + aging at 710-730 °C (exposure 8 h), air cooling |
|
- |
≥588 |
≥10 |
- |
- |
- |
| Forming at OST 1 90176-75. Annealing in air or in oil with 1100-1170 °C (exposure 2 hours) + Aging at 700-750 °C (extract 15-25 h), air cooling |
|
≥442 |
≤785 |
≥15 |
≥50 |
≥294 |
241-302 |
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 |
