EP615 (XH77SR1)

Classification

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

Chemical composition

Standard Fe, % Si, % B, % Mn, % Cr, % Ti, % Cu, % Ni, % Al, % P, % C, % S, %
< 3 2.5–3 0.8–1.2 < 0.4 13–15 < 0.2 < 0.25 75.715–83.3 < 0.5 < 0.02 0.4–0.7 < 0.015

Information on suppliers

Physical characteristics

Temperature, °C $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ $$\rho$$, $$\frac{kg}{m^3}$$ Cp, Дж/кг·К
20 13–16 55.8–65.8 8050 456

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{0.2}$$, $$MPa$$ d5, % Treatment
Tape GOST 19241-80 1 Transverse raw, cold rolling, thin, Transverse 800–850 580–630 0.5–1.5

Magnetic properties

Rolling $$\mu_{max}$$, $$MH/m$$ $$P_{1.5/50}$$, $$W/kg$$
Tape < 4000 1.5–1.6

Твёрдость по Роквеллу

Rolling Standard Classifiers Value, HRC
Tape GOST 492-2006 half-firm, cold rolling, thin, Transverse 40–45

Technological Properties

Weldability Flake Susceptibility Propensity to temper brittleness
no limits not sensitive not inclined

Critical point temperatures

Ac3(Acm), K
760–800

Limit operating modes

Standard Температура, °C
GOST 492-2006 500–650

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
B % Bor
Mn % Manganese
Cr % Chrome
Ti % Titan
Cu % Copper
Ni % Nickel
Al % Aluminium
P % Phosphorus
C % Carbon
S % Sulfur

Description of physical characteristics

Parameter Units of measurement Description
Cp Дж/кг·К Specific heat of material
$$\alpha\cdot 10^{6}$$ $$K^{-1}$$ 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
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

Description of magnetic properties

Parameter Units of measurement Description
$$\mu_{max}$$ $$MH/m$$ Magnetic permeability (not more)
$$P_{1.5/50}$$ $$W/kg$$ Specific magnetic losses (no more) while the magnetic induction is 1.5 T and frequency is 50 Hz

Designation of types of weldability

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
Ac3(Acm) K