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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.

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