Steel 1Х14Н14В2М (ЭИ257)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
1Х14Н14В2М |
| Designation GOST Latin |
1X14H14B2M |
| Transliteration |
1H14N14V2M |
| The chemical elements |
1Cr14Н14W2Mo |
| Name |
The value |
| Designation GOST Cyrillic |
ЭИ257 |
| Designation GOST Latin |
EI257 |
| Transliteration |
EhI257 |
| The chemical elements |
- |
Description
1Х14Н14В2М steel is used: for the manufacture of pipes; parts superheaters, steam collectors and pressure vessels.
Note
Steel complexly alloyed heat-resistant austenitic class.
Steel is recommended for continuous use at temperatures up to +550−600 °C.
Currently steel is produced, applied to steel 45KH14N14V2M (ЭИ69).
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and general norms |
В30 |
GOST 5632-61 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Mo |
W |
| GOST 5632-61 |
≤0.15 |
≤0.03 |
≤0.035 |
≤0.7 |
13-15 |
0.3-0.8 |
13-15 |
The rest |
0.4-0.6 |
2-2.75 |
Fe is the basis.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
Brinell hardness number, MPa |
| Pipe hot rolled. Quenching in water or air with 1100-1175 °C |
|
≥220 |
≥550 |
≥35 |
≤175 |
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 |
Technological properties
| Name |
The value |
| Weldability |
Steel of limited weldability. Welding methods: RD, RAD. After welding it is recommended to perform heat treatment for removing stress. |
| Forging temperature |
Start - 1160 °C, the end - 850 °C. the cooling of the forgings section up to 300 mm, manufactured from ingots and billets produced in the air in the stacks. |
| Machining by cutting |
In the hardened and tempered condition with a HB of 170 and σв = 600 MPa Kn b.St.= 0,4. |
