Steel 35ХН3МФА (35ХН3МФАР)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
35ХН3МФА |
| Designation GOST Latin |
35XH3MFA |
| Transliteration |
35HN3MFA |
| The chemical elements |
35CrН3MoV |
| Name |
The value |
| Designation GOST Cyrillic |
35ХН3МФАР |
| Designation GOST Latin |
35XH3MFAP |
| Transliteration |
35HN3MFAR |
| The chemical elements |
35CrН3MoVNB |
Description
35ХН3МФА steel is used: for the production of forged billets for rotors of troubleproof; rings for turbine generators, rotor shafts and flywheels forged shafts, turbine generator rotors, shafts and rotors of gas turbines and compressors and most critical highly loaded parts operating at temperatures up to 400 °C; heavily loaded parts of pipeline valves; cylinders with a volume of 400 liters, are designed for storing compressed air under pressure of 400 kgf/cm2 at a temperature of from minus 50°to plus 60 °C.
Note
Structural steel high-quality hromonikelemolibdenovyh.
Standards
| Name |
Code |
Standards |
| Sheets and stripes |
В23 |
GOST 103-2006 |
| Sectional and shaped rolling |
В32 |
GOST 1051-73, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77 |
| Sectional and shaped rolling |
В22 |
GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006 |
| Metal forming. Forgings |
В03 |
GOST 8479-70, TU 3-896-78, TU 108-11-910-87, TU 108.11.923-87 |
| Bulls. Blanks. Slabs |
В31 |
TU 108.11.889-87 |
| Cylinders made of steel |
В66 |
TU 14-3-883-79 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Mo |
| TU 3-896-78 |
0.3-0.4 |
≤0.025 |
≤0.025 |
0.25-0.5 |
1.1-1.4 |
0.17-0.37 |
2.75-3.25 |
The rest |
≤0.2 |
0.08-0.15 |
0.3-0.4 |
| TU 14-3-883-79 |
0.34-0.39 |
≤0.022 |
≤0.022 |
0.25-0.5 |
1.1-1.4 |
0.22-0.37 |
2.75-3.25 |
The rest |
≤0.3 |
0.08-0.15 |
0.3-0.4 |
| TU 108.11.923-87 |
0.25-0.35 |
≤0.015 |
≤0.015 |
0.2-0.6 |
1.1-1.55 |
≤0.37 |
2.6-3.55 |
The rest |
≤0.2 |
0.05-0.15 |
0.3-0.7 |
| TU 108.11.889-87 |
0.3-0.35 |
≤0.02 |
≤0.02 |
0.2-0.4 |
1.1-1.4 |
≤0.37 |
2.75-3.25 |
The rest |
≤0.3 |
0.08-0.15 |
0.3-0.4 |
Fe is the basis.
According to TU 14-3-883-79 the chemical composition is given for the steel of rotary grade 35ХН3МФА. Permissible deviations in chemical composition: carbon ± 0.010%, chromium ± 0.050%, manganese ± 0.020%, molybdenum ± 0.020%, vanadium ± 0.020%, nickel -0.10%, silicon +0.020%, On sulfur and phosphorus +0.0050% of each.
According to TU 3-896-78 the chemical composition is given for the rotary grade steel 35ХН3МФАР.
According to TU 108.11.923-87, the chemical composition is given for the steel of the rotary grade 35ХН3МФА. The total content of S + P≤0,025 for smelting by a duplex process and in electric furnaces. The content of S≤0.010%, P≤0.010% after out-of-furnace refining with a total content of S + P≤0,020%. The content of S≤0.012%, P≤0.012% after out-of-furnace evacuation (ODS) with a total content of S + P≤0,020%.
According to TU 108.11.889-87, deviations in chemical composition are allowed: by carbon ± 0.010%, by chroma ± 0.050%, by manganese ± 0.020%, by molybdenum ± 0.020%, by vanadium ± 0.020%, by nickel -0.10% , for silicon +0.020%. The total content of sulfur and phosphorus should not be more than 0.036% for smelting by a duplex process and in an electric furnace. The sulfur and phosphorus content after the use of the out-of-furnace refining and evacuation unit (OVPV) should not be more than 0.010% and 0.012%, respectively, for a sum of sulfur and phosphorus not more than 0.020%. The steel shall be melted according to the manufacturer's technical documentation using the UVRB unit. It is allowed to melt steel in an open-hearth furnace by a duplex process or in the main electric arc furnace.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
| Steel cylinders on the other 14-3-883-79 |
|
≥980 |
≥1128 |
≥11 |
≥45 |
≥686 |
| Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential) |
| - |
294 |
491 |
16 |
30 |
294 |
| Steel cylinders on the other 14-3-883-79 |
|
≥980 |
≥1098 |
≥11 |
≥45 |
≥686 |
| Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential) |
| - |
392 |
589 |
16 |
30 |
491 |
| For billet flywheels (indicates the direction and place the clippings of the sample) THAT 108.11.923-87 |
| - |
637 |
735 |
16 |
45 |
588 |
| Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential) |
| - |
491 |
687 |
16 |
30 |
392 |
| For billet flywheels (indicates the direction and place the clippings of the sample) THAT 108.11.923-87 |
| - |
637 |
735 |
17 |
50 |
686 |
| Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential) |
| - |
589 |
765 |
16 |
35 |
491 |
| For billet flywheels (indicates the direction and place the clippings of the sample) THAT 108.11.923-87 |
| - |
637 |
735 |
16 |
45 |
588 |
| Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential) |
| - |
687 |
834 |
14 |
35 |
491 |
| Billet rotor of the turbogenerator of 1000 MW (indicates the direction and place the clippings of the sample) THAT 108.11.923-87 |
| - |
666-813 |
764 |
16 |
45 |
490 |
| Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential) |
| - |
785 |
932 |
13 |
35 |
392 |
| Billet rotor of the turbogenerator of 1000 MW (indicates the direction and place the clippings of the sample) THAT 108.11.923-87 |
| - |
666-813 |
764 |
17 |
50 |
686 |
| Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential) |
| - |
883 |
1010 |
12 |
30 |
392 |
| Billet rotor of the turbogenerator of 1000 MW (indicates the direction and place the clippings of the sample) THAT 108.11.923-87 |
| - |
666-813 |
764 |
16 |
45 |
588 |
| Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential) |
| - |
981 |
1079 |
11 |
30 |
294 |
| Billet rotor of the turbogenerator with the capacity of 1200 MW (indicates the direction and place the clippings of the sample) THAT 108.11.923-87 |
| - |
666-813 |
764 |
16 |
45 |
490 |
| Forged billet rotors of turbine generators, thermal power plants up to 500 MW III-VI categories on the other 3-896-78 (indicate the cutting direction of sample) |
| - |
540 |
687 |
19 |
55 |
1177 |
| Billet rotor of the turbogenerator with the capacity of 1200 MW (indicates the direction and place the clippings of the sample) THAT 108.11.923-87 |
| - |
666-813 |
764 |
17 |
50 |
686 |
| Forged billet rotors of turbine generators, thermal power plants up to 500 MW III-VI categories on the other 3-896-78 (indicate the cutting direction of sample) |
| - |
540 |
687 |
17 |
45 |
785 |
| Billet rotor of the turbogenerator with the capacity of 1200 MW (indicates the direction and place the clippings of the sample) THAT 108.11.923-87 |
| - |
666-813 |
764 |
16 |
45 |
588 |
| Forged billet rotors of turbine generators, thermal power plants up to 500 MW III-VI categories on the other 3-896-78 (indicate the cutting direction of sample) |
| - |
638 |
785 |
18 |
55 |
981 |
| Billet rotor of the turbogenerator by power 800 MW (indicates the direction and place the clippings of the sample) THAT 108.11.923-87 |
| - |
637 |
735 |
16 |
45 |
588 |
| Forged billet rotors of turbine generators, thermal power plants up to 500 MW III-VI categories on the other 3-896-78 (indicate the cutting direction of sample) |
| - |
638 |
785 |
17 |
45 |
687 |
| Billet rotor of the turbogenerator by power 800 MW (indicates the direction and place the clippings of the sample) THAT 108.11.923-87 |
| - |
637 |
735 |
17 |
50 |
686 |
| - |
637 |
735 |
16 |
45 |
588 |
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 |
In the macrostructure of steel shall not be cavities, bubbles, delaminations, cracks, inclusions and placenow visible without magnification. |