Material:
45BStandard: alloy structural steel
GB 3077 45B grade steel is a kind of alloy structural steel. This steel has higher hardness, strength, wear resistance and hardenability than 45# steel. The critical hardenable diameter in water is 17~30mm, and the critical hardenable diameter in oil is 7~15mm.
GB 3077 45B Steel Chemical Composition
|
Grade |
Chemical Composition |
|
45B |
The Element (%) |
|
C |
Si |
Mn |
Cr |
Mo |
Ni |
W |
B |
Al |
Ti |
V |
|
0.42-0.49 |
0.17-0.37 |
0.60-0.90 |
- |
0.40-0.50 |
- |
- |
0.0005-0.0035 |
- |
- |
- |
GB 3077 45B Steel Mechanical Property
|
Grade |
Mechanical Property |
|
45B |
Yield Strength
Mpa |
Tensile Strength
Mpa |
Elongation
% |
Impact energy
J |
|
835 |
685 |
12 |
47 |
GB 3077 45B steel application
GB 3077 45B steel is usually used in quenched and tempered condition to make parts that are slightly larger and more expensive than 45 steel; such as the crank handle of tractors and other similar parts. In addition, 40cr steel can be replaced when manufacturing small-sized, less demanding parts.
