Chemical composition:
| Trademark |
Chemical composition | |||||||
|
C |
Si |
Mn |
P |
S |
Ni |
Cr |
Cu | |
|
≤ | ||||||||
|
40 |
0.37～0.44 |
0.17～0.37 |
0.50～0.80 |
0.035 |
0.035 |
0.30 |
0.25 |
0.25 |
|
45 |
0.42～0.50 |
0.17～0.37 |
0.50～0.80 |
0.035 |
0.035 |
0.30 |
0.25 |
0.25 |
Mechanical properties:
|
Trademark |
The sample blank Size / mm |
Heat treatment process |
Mechanical properties |
Delivery status hardness of steel / HBS | |||||||
|
Normalizing |
Quench |
Tempering |
σb/MPa |
σs/MPa |
δ5(％) |
ψ(％) |
Ak/J |
≤ | |||
|
≥ |
Without heat treatment |
Annealed steel | |||||||||
|
40 |
25 |
860 |
840 |
600 |
570 |
335 |
19 |
45 |
47 |
217 |
187 |
|
45 |
25 |
850 |
840 |
600 |
600 |
355 |
16 |
40 |
39 |
229 |
197 |
Characteristics and Uses:
40: manufacture of machinery for moving parts such as rollers, shafts, connecting rods, discs and so on. And train axles, but also for cold drawing, plate, strip, seamless tube and so on.
45: for the manufacture of steam turbines, compressors, pumps moving parts; can replace the carburized steel gears, shafts, piston pins and other parts (parts subject to high frequency or flame surface hardening); and used as a casting .
40: manufacture of machinery for moving parts such as rollers, shafts, connecting rods, discs and so on. And train axles, but also for cold drawing, plate, strip, seamless tube and so on.
45: for the manufacture of steam turbines, compressors, pumps moving parts; can replace the carburized steel gears, shafts, piston pins and other parts (parts subject to high frequency or flame surface hardening); and used as a casting .
