Steel 3Х2В8Ф
Designation
| Name |
The value |
| Designation GOST Cyrillic |
3Х2В8Ф |
| Designation GOST Latin |
3X2B8F |
| Transliteration |
3H2V8F |
| The chemical elements |
3Cr2W8V |
Description
3Х2В8Ф steel is used: for the manufacture of heavy-duty press tool (small inserts final stamping of the stream of matrices and punches for extrusion, etc.) during hot deformation of alloyed structural steels and heat-resistant alloys; molds of pressure casting of copper alloys.
Standards
| Name |
Code |
Standards |
| Sectional and shaped rolling |
В22 |
GOST 1133-71, GOST 2590-2006, GOST 2591-2006 |
| Sheets and stripes |
В33 |
GOST 4405-75, TU 14-131-971-2001 |
| Sectional and shaped rolling |
В32 |
GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-1-335-72, TU 14-19-31-87, TU 14-11-245-88, TU 14-1-5243-93 |
| Bulls. Blanks. Slabs |
В31 |
OST 24.952.01-89 |
| Metal forming. Forgings |
В03 |
TU 14-1-1530-75 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Mo |
W |
| TU 14-1-335-72 |
0.29-0.35 |
≤0.03 |
≤0.03 |
0.2-0.4 |
2.3-2.7 |
0.15-0.4 |
≤0.35 |
The rest |
≤0.3 |
0.2-0.4 |
≤0.5 |
8-8.5 |
Fe is the basis.
Mechanical characteristics
| Section, mm |
t отпуска, °C |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
HRC |
| Rolled steel. Quenching in oil from 1130 °C to + Vacation at 650 °C (exposure 2 hours) (longitudinal samples) |
|
- |
≥1390 |
≥1530 |
≥12 |
≥36 |
≥200 |
- |
| Rolled steel. Quenching in oil from 1130 °C to + Leave (exposure 2 hours) (longitudinal samples) |
| - |
600 |
- |
≥1720 |
≥10 |
≥41 |
≥200 |
≥52 |
| - |
625 |
≥1460 |
≥1640 |
≥7 |
≥28 |
≥250 |
≥50 |
| - |
650 |
≥1390 |
≥1530 |
≥12 |
≥36 |
≥200 |
≥48 |
| - |
675 |
≥1310 |
≥1430 |
≥10 |
≥36 |
≥250 |
≥45 |
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) |
Physical characteristics
| Temperature |
Е, ГПа |
r, кг/м3 |
l, Вт/(м · °С) |
R, НОм · м |
| 20 |
224 |
7820 |
- |
- |
| 100 |
218 |
- |
25 |
250 |
| 200 |
211 |
- |
27 |
200 |
| 300 |
204 |
- |
29 |
170 |
| 400 |
196 |
- |
40 |
140 |
| 500 |
187 |
- |
46 |
120 |
| 600 |
177 |
- |
50 |
- |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| G |
Modulus of elasticity shear torsion |
| r |
Density |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
Technological properties
| Name |
The value |
| Weldability |
Does not apply to welded structures. |
| Propensity to temper brittleness |
Inclined. |
| Forging temperature |
Start - 1200 °C, the end of - 900 °C., Cooling to 750 °C in air, then in the sand. |
| Flock-sensitive sensitivity |
Sensitive. |
| Workability by cutting |
At 200-220 HB and blower SB=710 MPa Kn TV.SPL.=0,9 Kn b.St.=0,45. |
