Steel 12Х12М1БФР (ЭП450)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
12Х12М1БФР |
| Designation GOST Latin |
12X12M1BFP |
| Transliteration |
12H12M1BFR |
| The chemical elements |
12Cr12Mo1NbVB |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП450 |
| Designation GOST Latin |
EP450 |
| Transliteration |
EhP450 |
| The chemical elements |
- |
Description
12Х12М1БФР steel is used: for the manufacture of pipes, designed for continuous operation at temperatures up to +630 °C, power equipment and nuclear power plant equipment; wire diameter 1.05 mm, intended for manufacturing of components in nuclear power facilities operating in the environment of liquid alkali metals.
Note
High-temperature corrosion-resistant chromium steel, alloy boron steel of ferrite-martensitic type.
Standards
| Name |
Code |
Standards |
| Bulls. Blanks. Slabs |
В31 |
TU 14-1-3820-84 |
| Sectional and shaped rolling |
В32 |
TU 14-131-992-2003 |
| Low-carbon steel wire |
В71 |
TU 14-159-341-2010 |
| Pipes steel and connecting parts to them |
В62 |
TU 14-3-1511-87 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
V |
B |
Mo |
Nb |
Ca |
| TU 14-159-341-2010 |
0.1-0.15 |
≤0.015 |
≤0.025 |
≤1 |
11-13.5 |
≤0.5 |
0.05-0.3 |
The rest |
0.1-0.3 |
0.005-0.015 |
1.5-2 |
0.15-0.4 |
0.001-0.05 |
| TU 14-3-1511-87 |
0.1-0.15 |
≤0.015 |
≤0.025 |
≤0.8 |
11-13.5 |
≤0.5 |
0.05-0.3 |
The rest |
0.1-0.3 |
≤0.08 |
1.2-1.8 |
0.25-0.55 |
- |
Fe is the basis.
According to TU 14-3-1511-87, the chemical composition is given for steel grade 12X12M1BFR-SH (EP450-SH).
According to TU 14-1-3820-84, the chemical composition is given for steel grade 12X12M1BFR-SH (EP450-SH). Boron and calcium are introduced into the metal by calculation and chemical analysis are not determined. Deviation in niobium is allowed to be -0.10%.
According to TU 14-159-341-2010 the chemical composition is given for steel grade 12X12M1BFR-SH (EP450-SH). Boron and calcium are introduced into the metal by calculation and chemical analysis are not determined. The calculated content of boron and calcium is recorded in the document on the quality of the pipes. In the finished product, deviations in chemical composition are allowed: niobium -0.10%, phosphorus +0.0050%, chromium ± 0.10%.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
d |
| Wire on the other 14-159-341-2010 in the delivery condition. In the graph δ indicates the value δ100 |
| 1.05 |
- |
≥620 |
- |
≥10 |
| Tubular billet on the other 14-1-3820-84. Quenching in water from 1050-1080 °C + Vacation at 720-740 °C (aging of 1.0-1.5 h), air cooling (longitudinal samples) |
|
≥275 |
≥310 |
≥20 |
- |
| Pipe cold-worked welded austenitic beyond 14-3-1511-87. Normalization at 1000-1050 °C, air cooling + Vacation at 750-780 °C (extract 3 hrs), air cooling (longitudinal samples) |
|
≥640 |
≥820 |
≥17 |
- |
| Tubular billet on the other 14-1-3820-84. Quenching in water from 1050-1080 °C + Vacation at 720-740 °C (aging of 1.0-1.5 h), air cooling (longitudinal samples) |
|
≥490 |
≥640 |
≥12 |
- |
|
≥343 |
≥490 |
≥12 |
- |
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 |
| d |
Elongation after rupture |
Physical characteristics
| Temperature |
Е, ГПа |
r, кг/м3 |
l, Вт/(м · °С) |
a, 10-6 1/°С |
| 20 |
228 |
7850 |
276 |
- |
| 200 |
215 |
- |
24 |
1113 |
| 300 |
209 |
- |
251 |
1142 |
| 400 |
195 |
- |
263 |
118 |
| 500 |
188 |
- |
272 |
12 |
| 600 |
173 |
- |
28 |
1215 |
| 700 |
155 |
- |
289 |
1215 |
| 100 |
- |
- |
218 |
1115 |
| 800 |
- |
- |
- |
1265 |
| 900 |
- |
- |
- |
116 |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| r |
Density |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
| С |
Specific heat |
