Steel 4KHMFS (40ХСМФ)

Designation

Name The value
Designation GOST Cyrillic 4ХМФС
Designation GOST Latin 4XMFC
Transliteration 4HMFS
By chemical elements 4CrMoVС
Name The value
Designation GOST Cyrillic 40ХСМФ
Designation GOST Latin 40XCMF
Transliteration 40HSMF
By chemical elements 40CrСMoV

Description

4KHMFS steel is used: for the manufacture of hammer stamps vapor and pneumatic hammers weighing falling parts to 3 t during the deformation of alloyed steels and stainless steels (instead of less heat-resistant steel grades 5KHNM, 5KHNV); extrusion tools for aluminium alloys; inserts and punches landing on horizontal forging machines.

Standards

Name Code Standards
Bars and shapes В22 GOST 1133-71, GOST 2590-2006, GOST 2591-2006
Sheets and strips В33 GOST 4405-75, TU 14-131-971-2001
Bars and shapes В32 GOST 5950-2000, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-11-245-88
Blanks. Of the workpiece. Slabs В31 OST 24.952.01-89

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu V Ti Mo W
GOST 5950-2000 0.37-0.45 ≤0.03 ≤0.03 0.5-0.8 1.5-1.8 0.5-0.8 ≤0.4 Rest ≤0.3 0.3-0.5 ≤0.03 0.9-1.2 ≤0.2
Fe is the basis.

Mechanical properties

Section, mm t отпуска, °C sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2 HRC
Forming (samples). Quenching in oil from 950 °C to + Vacation at 550 °C
500 - ≥1280 ≥1450 ≥7 ≥20 ≥196 -
Long products (samples). Quenching in oil from 920 ° + Vacation (exposure 2 hours)
- 300 ≥1570 ≥2060 ≥10 ≥41 - ≥51
Long products (samples). Quenching in oil from 920 ° + Vacation at 560 °C (exposure 2 hours)
- - ≥1250 ≥1390 ≥11 ≥44 - -
Long products (samples). Quenching in oil from 920 ° + Vacation (exposure 2 hours)
- 400 ≥1370 ≥1660 ≥11 ≥38 - ≥49
Long products (samples). Quenching in oil from 920 ° + Vacation at 560 °C (exposure 2 hours)
- - ≥1180 ≥1310 ≥12 ≥49 - -
Long products (samples). Quenching in oil from 920 ° + Vacation (exposure 2 hours)
- 500 ≥1340 ≥1610 ≥12 ≥47 - ≥47
Long products (samples). Quenching in oil from 920 ° + Vacation at 560 °C (exposure 2 hours)
- - ≥1180 ≥1270 ≥13 ≥55 - -
Long products (samples). Quenching in oil from 920 ° + Vacation (exposure 2 hours)
- 600 ≥1180 ≥1260 ≥14 ≥53 - ≥42
Long products (samples). Quenching in oil from 920 ° + Vacation at 560 °C (exposure 2 hours)
- - ≥950 ≥1070 ≥14 ≥63 - -
Long products (samples). Quenching in oil from 920 ° + Vacation (exposure 2 hours)
- 650 ≥820 ≥880 ≥22 ≥63 - ≥30
Stamp section up to 500 mm (samples). Quenching in oil from 950 °C to + Vacation at 550 °C (exposure 2 hours)
- - ≥1280 ≥1450 ≥7 ≥20 - -
- - ≥1190 ≥1340 ≥8 ≥27 - -
- - ≥760 ≥900 ≥10 ≥45 - -

Description mechanical marks

Name Description
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU Limit short-term strength
d5 Elongation after rupture
y The relative narrowing
KCU Toughness
HRC Rockwell hardness (indenter diamond spheroconical)

Technological properties

Name The value
The temperature of forging Start - 1150 °C, the end - 850 °C slow Cooling in the wells.