1.8550 is CrAlNiMo-alloyed nitriding steel with a surface hardness after nitriding of minimum 950HV.
Barrels and screws for injection moulding machines,
plungers, piston rods, parts for general engineering.
Carbon |
Chromium |
Molybdenum |
Nickel |
Aluminum |
C |
Cr |
Mo |
Ni |
Al |
0,34 |
1,70 |
0,20 |
1,00 |
1,00 |
Temperature |
Cooling |
Hardness |
|
Soft annealing |
650 – 700°C |
furnace |
|
Normalizing |
860 – 900°C |
furnace |
|
Hardening |
870 – 930°C |
oil, pressure gas (N2), air or hot bath 500 – 550°C |
See Tempering Diagram |
Hardness |
27 – 33 |
HRC |
Tensile strength |
800 – 1100 |
N/mm2 |
Yield strength |
600 – 680 |
kN/mm2 |
ElongationL=5D |
10 – 13 |
% |
Toughness |
30 – 35 |
CVN (J) |
Coefficient of thermal expansion |
12,1 – 13,7 |
1/K * 10-6 |
Thermal conductivity (20°C)
|
33,7 |
W/mK |
Density |
7,80 |
g/cm3 |
