EP99 (XH50MVKTYUR)

Classification

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

Chemical composition

Standard Fe, % Si, % B, % Mn, % Co, % Cr, % Ti, % Ni, % Al, % Ce, % P, % C, % S, % Nb, % Mo, % W, %
< 3 < 0.3 < 0.005 < 0.3 5–8 17.5–19.5 1–1.5 50.745–65 2.5–3 < 0.02 < 0.015 < 0.1 < 0.015 < 1.5 3.5–5 5.5–7

Information on suppliers

Physical characteristics

Temperature, °C $$E\cdot 10^{9}$$, $$MPa$$ $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ $$\varkappa$$, $$\frac{W}{m\cdot K}$$ Cp, Дж/кг·К
20 205 11.6 9.63 336

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{Y}$$, $$MPa$$ d5, % Treatment
Sheet cold rolled. GOST 6235-91 2.5 Transverse specified strength, cold rolling, thin, Transverse 1100–1200 400–450 30–40

Твёрдость по Роквеллу

Rolling Standard Classifiers Value, HRC
Sheet GOST 6235-91 raw, cold rolling, thin, Transverse 40–44

Technological Properties

Weldability Flake Susceptibility Propensity to temper brittleness
Boundedly welded not sensitive loathsome

Description of chemical elements

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

Description of physical characteristics

Parameter Units of measurement Description
Cp Дж/кг·К Specific heat of material
$$E\cdot 10^{9}$$ $$MPa$$ Elastic modulus
$$\alpha\cdot 10^{6}$$ $$K^{-1}$$ 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)

Description of mechanical properties

Parameter Units of measurement Description
d5 % Elongation at break
$$\sigma_{Y}$$ $$MPa$$ Yield strength
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength

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