4H4VMFS (DI22, 40H4VMFS)

Another designation DI22. Temperature of critical points: Ac ₁ = 830, Ac ₃ (Ac _m) = 910, Ar ₃ (Arc _m) = 750, Ar ₁ = 670, Mn = 255. Hardness after heat treatment (GOST 5950−2000) HB 10 ^-1 = 241 MPa.

machine tools for high-speed stamping, landing on gorizontalnokovochnyh machines; inserts stamps for hot deformation of alloyed construction steels and superalloys hammers and crank presses; mold molding copper alloy

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Tool steel	Die tool steel

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	Cu, %	Ni, %	V, %	P, %	C, %	S, %	Mo, %	W, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	Cu, %	Ni, %	V, %	P, %	C, %	S, %	Mo, %	W, %
GOST 5950-2000	89.5–93.03	0.6–1	0.2–0.5	3.2–4	< 0.3	< 0.6	0.6–0.9	< 0.03	0.37–0.44	< 0.03	1.2–1.5	0.8–1.2

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	Treatment
Metal rolling					1700	1500	440	Hardening of 1050-1070 ° C, the oil, leave 620-630 ° C, 560-580 ° C and Holidays

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Alloy	GOST 5950-73	heat-treated	241

Critical point temperatures

Ac₁, K	Ac₃(Ac_m), K	Ar₃(Arc_m), K	Ar₁, K	Mn, K
Ac₁, K	Ac₃(Ac_m), K	Ar₃(Arc_m), K	Ar₁, K	Mn, K
830	910	750	670	255

Analogues

USA	Germany	Japan
USA	Germany	Japan
H12	1.2567 (30WCrV17-2)	SKD62

Standards

Standard	Description
Standard	Description
GOST 5950-2000	GOST

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mn	%	Manganese
Cr	%	Chrome
Cu	%	Copper
Ni	%	Nickel
V	%	Vanadium
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur
Mo	%	Molybdenum
W	%	Tungsten

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$\sigma _{U}$	$MPa$	Ultimate tensile strength
$\sigma_{P}$	$MPa$	Proportionality limit
$KCU\cdot 10^{3}$	$\frac{J}{m^2}$	Impact toughness

Description of temperatures of critical points

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
Ac₁	K
Ac₃(Ac_m)	K
Ar₃(Arc_m)	K
Ar₁	K
Mn	K