Steel 30ХН3М2ФА (30ХН3М2Ф)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
30ХН3М2ФА |
| Designation GOST Latin |
30XH3M2FA |
| Transliteration |
30HN3M2FA |
| The chemical elements |
30CrН3Mo2V |
| Name |
The value |
| Designation GOST Cyrillic |
30ХН3М2Ф |
| Designation GOST Latin |
30XH3M2F |
| Transliteration |
30HN3M2F |
| The chemical elements |
30CrН3Mo2V |
Description
30ХН3М2ФА steel is used: for the manufacture of blanks of disks of steam turbines with a working operating temperature up to +350 °C.
Standards
| Name |
Code |
Standards |
| Metal forming. Forgings |
В03 |
TU 108-1028-81 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Mo |
| TU 108-1028-81 |
0.26-0.32 |
≤0.022 |
≤0.025 |
0.2-0.5 |
1.2-1.7 |
≤0.37 |
3-3.5 |
The rest |
≤0.25 |
0.1-0.2 |
0.4-0.65 |
Fe is the basis.
According to TU 108-1028-81, the chemical composition is given for steel grade 30ХН3М2ФА. In the workpieces, deviations in the content of the elements indicated in the table are allowed: carbon ± 0.010%, silicon + 0.030%. In the manufacture of blanks with discs with hub heights from 450 to 650 mm, the content of phosphorus and sulfur in steel should not be more than 0.018% of each; For metal VDP and ELP, the deviation of manganese content +0.10% is allowed. In the ESR steel, the sulfur content should not be more than 0.015%. When casting steel without evacuation, for the manufacture of disc blanks with a hub height of more than 300 mm, hydrogen content in the metal must be determined. The results of determination of the hydrogen content are not acceptance-delivery and, at the request of the consumer, are to be entered in the procurement certificate.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
Brinell hardness number, MPa |
| Forged blanks of disks of steam turbines on the other 108-1028-81 (in the delivery condition specified strength; in cross-section, if regulated, see the recommended height of the hub) |
| ≤550 |
664-833 |
≥815 |
≥12 |
≥40 |
≥490 |
- |
| Forgings. Annealing in air with 850-870 °C + Vacation at 580-650 °C, air cooling |
| 500 |
≥750 |
≥900 |
≥12 |
≥35 |
≥490 |
277-321 |
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 |
Physical characteristics
| Temperature |
r, кг/м3 |
| 20 |
7800 |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| r |
Density |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
Technological properties
| Name |
The value |
| Weldability |
Difficult weldability. |
| Propensity to temper brittleness |
Malosolone. |
| Forging temperature |
Start - 1200 °C, the end of - 900 °C. |
| Flock-sensitive sensitivity |
A highly sensitive. |
