Steel 03Х11Н10М2Т1 (ЭП679)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
03Х11Н10М2Т1 |
| Designation GOST Latin |
03X11H10M2T1 |
| Transliteration |
03H11N10M2T1 |
| The chemical elements |
03Cr11Н10Mo2Ti1 |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП679 |
| Designation GOST Latin |
EP679 |
| Transliteration |
EhP679 |
| The chemical elements |
- |
Description
03Х11Н10М2Т1 steel is used: for the production of highly loaded parts of turbine, gears, spindles, working in temperature range from cryogenic to +500 °C.
Note
High-strength corrosion-resistant Maraging steel.
Standards
| Name |
Code |
Standards |
| Bulls. Blanks. Slabs |
В31 |
TU 14-1-1046-74, TU 14-1-3072-80 |
| Metal forming. Forgings |
В03 |
TU 14-1-2100-77, TU 14-1-5285-94 |
| Sheets and stripes |
В33 |
TU 14-1-2519-78, TU 14-1-5132-92 |
| Sectional and shaped rolling |
В32 |
TU 14-1-4608-89 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
Al |
B |
Ti |
Mo |
Nb |
Zr |
| TU 14-1-5285-94 |
≤0.03 |
≤0.01 |
≤0.01 |
≤0.1 |
10-11.3 |
≤0.15 |
9-10.3 |
The rest |
- |
≤0.2 |
0.003 |
1-1.4 |
1.8-2.3 |
≤0.15 |
0.03 |
| TU 14-1-4608-89 |
≤0.03 |
≤0.01 |
≤0.01 |
≤0.1 |
10-11.3 |
≤0.15 |
9-10.3 |
The rest |
≤0.3 |
≤0.2 |
0.002 |
1-1.4 |
1.8-2.3 |
≤0.15 |
0.06 |
Fe is the basis.
According to TU 14-1-4608-89 the chemical composition is given for steel grade 03H11N10M2T1-VD (EP679-VD). Boron and zirconium are introduced into the metal by calculation without taking into account the burn and chemical analysis is not determined. Deviations from the chemical composition are permissible: carbon +0.0050%, chromium ± 0.20%, nickel -0.20%. Deviations in sulfur and phosphorus are allowed, provided that the total mass fraction does not exceed 0.022%, and also for silicon and manganese, provided that the total mass fraction does not exceed 0.30%.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
| Bars hot rolled and forged THAT 14-1-4608-89. Group 1. The longitudinal samples. Bars up to 100 mm: Hardened in air or in water 950-980 °C + Aging at 500-520 °C (extract to 4.0-4.5 hours), air cooling; Rods over 100 mm: Triple tempering in air or in water 950-980 °C (40 minutes exposure) + Aging at 500-520 °C (extract to 4.0-4.5 hours), air cooling |
|
≥1270 |
≥1370 |
≥8 |
≥35 |
≥343 |
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 |
Pollution steel non-metallic inclusions estimated average score on the methods and scales GOST 1778 (SH1 Ш4 or method) and should not exceed: nitride inclusions - 3.0 points, silicates, non-deformed - 2.5 points, other types of inclusions - 1.0 points. The surface quality and macrostructure must meet the requirements of GOST 5949. |
