|
parameters2:
parameters3:
Chemical Composition (in weight %)
C |
Si |
Mn |
Cr |
Mo |
Ni |
V |
W |
Others |
0.21 |
0.45 |
0.45 |
1.35 |
1.10 |
max. 0.30 |
0.30 |
- |
- |
Description
Special structural steel.
Applications
Screws and nuts and forged components for staem
engines up to working temperatures of maximum 539oC.
Physical properties (avarage values) at
ambient temperature
Modulus of elasticity [103 x N/mm2]: 210
Density [g/cm3]: 7.80
Soft Annealing
Heat to 650-740oC, cool slowly.
Hardening
Harden from a temperature of 900-950oC followed by oil or air quenching.
Tempering
Tempering temperature: 680-740oC.
Mechanical Properties in Quenched and
Tempered Condition
Diameter (mm) |
0.2 proof stress (N/mm2) |
Tensile stregth (N/mm2) |
Elongation (%) |
Reduction (%) |
Notch impact energy (ISO-V) (J) |
Up to 160 |
540 |
690-830 |
16 |
- |
55 |