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	s_T\|s_0,2, MPa	σ_U, 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
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	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.