2.4778 (G-CoCr28)

Classification

Country Section Category
Germany Alloy DIN 17007−4 Ni Alloys with Co, Cr and Mo Co Alloys with Cr, Ni and Mo

Chemical composition

Standard Fe, % Si, % Mn, % Co, % Cr, % Ni, % P, % C, % S, % Nb, % Mo, %
DIN 17465 9.68–24.45 0.5–1.5 < 1.5 37.23–62.77 27–30 < 4 < 0.04 0.05–0.25 < 0.03 < 0.5 < 0.5

Information on suppliers

Physical characteristics

Temperature, °C \alpha\cdot 10^{6}, K^{-1} \varkappa, \frac{W}{m\cdot K} \rho, \frac{kg}{m^3} c\cdot 10^{-3}, \frac{J}{kg\cdot K}
20 9.2 8100 0.5
400 15.5
800 17
1000 18

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers \sigma _{U}, MPa \sigma_{0.2}, MPa \epsilon_L, % Treatment
490 235 6

Analogues

USA
UMCo-50

Standards

Standard Description
DIN 17465
DIN EN 10295:2002

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Co % Cobalt
Cr % Chrome
Ni % Nickel
P % Phosphorus
C % Carbon
S % Sulfur
Nb % Niobium
Mo % Molybdenum

Description of physical characteristics

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
c\cdot 10^{-3} \frac{J}{kg\cdot K} The specific heat of the material (range 20°C–T)

Description of mechanical properties

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