α⋅106
K−1
ϰ
Wm⋅K
ρ
kgm3
σU
MPa
σ0.2
MPa

EP617 (HN65KUVMR)

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Heat resistant steels and alloys	Heat resistant low alloy steel

Chemical composition

Standard	Fe, %	Si, %	B, %	Mn, %	Co, %	Cr, %	Ni, %	Al, %	Ce, %	P, %	C, %	S, %	Mo, %	W, %
Standard	Fe, %	Si, %	B, %	Mn, %	Co, %	Cr, %	Ni, %	Al, %	Ce, %	P, %	C, %	S, %	Mo, %	W, %
	< 1	< 0.6	< 0.02	< 0.3	4–6	14–15.5	61.734–69.9	4.8–5.4	< 0.02	< 0.015	< 0.1	< 0.011	2.8–3.8	4.5–5.5

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Physical characteristics

Temperature, °C	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\varkappa$ , $\frac{W}{m\cdot K}$	$\rho$ , $\frac{kg}{m^3}$
Temperature, °C	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\varkappa$ , $\frac{W}{m\cdot K}$	$\rho$ , $\frac{kg}{m^3}$
20	12.1–12.7	11.3–12.5	8250

Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{0.2}$ , $MPa$	d5, %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{0.2}$ , $MPa$	d5, %	Treatment
Round	TU 14-1-1442-75	40	Transverse	hot rolling, fat, Transverse	570	220	7–10

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Rolling	Standard	Classifiers	Value, HRC
Rolling	Standard	Classifiers	Value, HRC
Round	TU 14-1-1494-75	raw, hot rolling, hardness, Transverse	38–40

Technological Properties

Weldability	Flake Susceptibility
Weldability	Flake Susceptibility
Boundedly welded	insensitive

Limit operating modes

Standard	Температура, °C
Standard	Температура, °C
TU 14-1-1494-75	650–720

Heat Treatment Modes

Treatment
Treatment
quenching from 1220 ± 10 ° С (4-6 hours) in air, aging at 850 ± 15 ° С (24 hours)

Long-term strength

Standard	Treatment	Постоянно приложенное напряжение, МПа
Standard	Treatment	Постоянно приложенное напряжение, МПа
TU 14-1-1494-75		> 530

Properties

Property
Property
It is deformed in a hot state. The temperature range of stamping is 1180 ... 1050 ° C. Cooling after hot deformation in air

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
B	%	Bor
Mn	%	Manganese
Co	%	Cobalt
Cr	%	Chrome
Ni	%	Nickel
Al	%	Aluminium
Ce	%	Cerium
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur
Mo	%	Molybdenum
W	%	Tungsten

Description of physical characteristics

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$\alpha\cdot 10^{6}$	$K^{-1}$	Coefficient of thermal (linear) expansion (range 20°C–T)
$\varkappa$	$\frac{W}{m\cdot K}$	Coefficient of thermal conductivity (the heat capacity of the material)
$\rho$	$\frac{kg}{m^3}$	The density of the material

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
d5	%	Elongation at break
$\sigma_{0.2}$	$MPa$	Tensile stress required to produce a total elongation of 0.2%
$\sigma _{U}$	$MPa$	Ultimate tensile strength

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