Steel 07Х12НМБФ (ЭП609)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
07Х12НМБФ |
| Designation GOST Latin |
07X12HMBF |
| Transliteration |
07H12NMBF |
| The chemical elements |
07Cr12НMoNbV |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП609 |
| Designation GOST Latin |
EP609 |
| Transliteration |
EhP609 |
| The chemical elements |
- |
Description
07Х12НМБФ steel is used: for the manufacture of sheet and structural shapes, hot rolled and forged bars and forgings intended for subsequent cold machining or hot for subsequent machining (stamping, forging, rolling, etc.) in the manufacture of machine parts; solid-rolled rings for different purposes; welding wire.
Note
Steel corrosion-resistant martensitic class.
Standards
| Name |
Code |
Standards |
| Sheets and stripes |
В23 |
GOST 82-70, GOST 19903-74, GOST 19904-90, GOST 19903-90 |
| Classification, nomenclature and general norms |
В20 |
OST 1 90005-91 |
| Bulls. Blanks. Slabs |
В31 |
OST 1 90231-76, OST 1 90302-81, OST 1 90348-83, OST 1 90385-89, TU 14-1-1214-75 |
| Sectional and shaped rolling |
В32 |
OST 1 92049-76, TU 14-1-931-74 |
| Metal forming. Forgings |
В03 |
TU 14-1-1530-75, TU 14-1-2918-80 |
| Sheets and stripes |
В33 |
TU 14-1-2271-77, TU 14-1-2412-78 |
| Welding and cutting of metals. Soldering, riveting |
В05 |
TU 14-1-2458-78 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
V |
Mo |
Nb |
Ce |
| TU 14-1-2412-78 |
0.05-0.09 |
≤0.02 |
≤0.03 |
≤0.6 |
10.5-12 |
≤0.6 |
1.4-1.8 |
The rest |
0.15-0.25 |
0.35-0.5 |
0.05-0.15 |
≤0.02 |
| TU 14-1-2918-80 |
0.05-0.09 |
≤0.02 |
≤0.03 |
≤0.6 |
10.5-12 |
≤0.6 |
1.4-1.8 |
The rest |
0.15-0.25 |
0.35-0.5 |
0.05-0.15 |
≤0.02 |
Fe is the basis.
According to TU 14-1-2271-77, TU 14-1-2412-78 and TU 14-1-2918-80, the chemical composition is given for steel grade 07X12HMBF-SH (EP609-Ш). Cerium is introduced into the metal by calculation and chemical analysis is not determined.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
Brinell hardness number, MPa |
HRC |
| Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91 |
| - |
- |
880-1080 |
- |
- |
- |
262-311 |
23-34 |
| Ring welded at OST 1 90231-76. Quenching in oil 1000-1050 °C + Vacation at 540-570 °C |
|
≥833 |
≥980 |
≥12 |
≥55 |
≥588 |
302-387 |
- |
|
≥755 |
≥883 |
≥7 |
≥30 |
≥294 |
- |
- |
| Ring forged in OST 1 92049-76. Quenching in oil or air from 1000-1050 °C + Vacation at 630-670 °C, air cooling |
| 30 |
≥785 |
≥910 |
≥10 |
≥50 |
≥735 |
- |
- |
| Sheet of Kh/K (0.8-3.0 mm) and g/K to (2.0-3.0 mm). Without additional heat treatment in the delivery state (after annealing) |
| - |
- |
≤930 |
≥13 |
- |
- |
- |
- |
| Sheet of Kh/K (0.8-3.0 mm) and g/K to (2.0-3.0 mm). Normalization 1040-1060 °C and leave at 640-660 °C, air cooling |
| - |
640-830 |
830-1030 |
≥10 |
- |
- |
- |
- |
| Sheet of Kh/K (0.8-3.0 mm) and g/K to (2.0-3.0 mm). Delivery condition + Tempering air with 1000-1050 °C + vacation at 630-670 °C, air cooling |
| - |
≥735 |
≥833 |
≥10 |
- |
- |
- |
- |
| Forgings. Annealing in air or in oil with 1000-1050 °C + Vacation at 630-670 °C, air cooling |
|
≥736 |
≥834 |
≥12 |
≥55 |
≥688 |
255-341 |
- |
| Strip (thickness 6,0-40,0 mm, width 400-480 mm). Annealing in air or in oil at 1000-1050 °C + vacation at 640-660 °C, air cooling |
| - |
- |
≥890 |
≥13 |
- |
- |
- |
- |
| Strip (thickness 6,0-40,0 mm, width 400-480 mm). Delivery condition - after softening annealing |
| - |
- |
≤931 |
≥14 |
- |
- |
- |
- |
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 |
| HRC |
Rockwell hardness (indenter diamond spheroconical) |
Technological properties
| Name |
The value |
| Features of production |
Ring welded at OST 1 90231-76 are supplied in the normalized and vysokoopasnye condition with hardness of the ≤285 HB (indentation diameter, mm) of at least 3.6. |
