4H2V5MF (EI959)

Another designation EI959. Temperature of critical points: Ac1 = 820, Ac3 (Acm) = 940, Ar3 (Arcm) = 840, Ar1 = 690, Mn = 205. Hardness after annealing (GOST 5950−2000): HB 10 ^-1 = 241 MPa.

for heavy duty pressing tool (small inserts final stamping stream of small pluggable characters, punches and dies for extrusion, etc.) at the hot deformation of alloy structural steels and superalloys

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	87.69–91.6	0.1–0.4	0.1–0.45	2.2–3	< 0.3	< 0.4	0.6–0.9	< 0.03	0.3–0.4	< 0.03	0.6–0.9	4.5–5.5

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	Treatment
Round		15			1680	1480	10	42	300	Hardening 1080 ° C, oil

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Alloy	GOST 5950-73	annealing	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
820	940	840	690	205

Analogues

Germany	Japan	France	Italy	Poland	Czech Republic	Austria
Germany	Japan	France	Italy	Poland	Czech Republic	Austria
1.2567 (30WCrV17-2)	SKD4	X32WCrV5	X30WCrV5-3KU	WWS1	19720	BOHLERW105

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
$\epsilon_L$	%	Elongation at break (longitudinal)
$\psi$	%	Reduction in cross section on fracture
$KCU\cdot 10^{3}$	$\frac{J}{m^2}$	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