6HV2S (6H3FS)

Substitute: 6H3FS. Steel is prone to temper embrittlement, does not apply to welded structures. Flock sensitivity: sensitive. Hardness after heat treatment (GOST 5950−2000): HB 10 ^-1 = 255 MPa .

knives for cold metal cutting, thread rolling dies, punches and crimping dies for cold work dies of complex shape, working with high shock loads.

Classification

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

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	Cu, %	Ni, %	P, %	C, %	S, %	W, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	Cu, %	Ni, %	P, %	C, %	S, %	W, %
GOST 5950-2000	93.34–95.6	0.5–0.8	0.15–0.45	1–1.3	< 0.3	< 0.4	< 0.03	0.55–0.65	< 0.03	2.2–2.7

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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
Metal rolling					1770	1680	7	18	260	Tempering 880 ° C, oil, leave 450 ° C, 2 h

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
Alloy	GOST 5950-73	heat-treated	255

Technological Properties

Weldability	Flake Susceptibility	Propensity to temper brittleness
Weldability	Flake Susceptibility	Propensity to temper brittleness
Not applicable for welded structures	sensitive	inclined

Critical point temperatures

Ac₁, K	Ac₃(Ac_m), K	Mn, K
Ac₁, K	Ac₃(Ac_m), K	Mn, K
775	810	280

Analogues

USA	Germany	United Kingdom	European Union	Italy	Spain	Hungary	Poland	Austria	Czech Republic
USA	Germany	United Kingdom	European Union	Italy	Spain	Hungary	Poland	Austria	Czech Republic
T41901	1.2550 (60WCrV7)	BS1	55WCrV8	55WCrV8KU	60WCrSi8	W6	NZ3	BOHLERK455	19733

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
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur
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

Designation of types of weldability

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
no limits		Welding is performed without heating and without subsequent heat treatment
Boundedly welded		Welding is possible with heating up to 100–120 °C and subsequent heat treatment
Difficult to weld		For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing
Not applicable for welded structures

Description of temperatures of critical points

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