Q890D quenched and tempered high-strength steel is suitable for the manufacture of steel structural parts such as coal mine hydraulic supports, heavy vehicles and construction machinery that require good welding performance.
GBT 16270 Q890D Chemical Composition
|
Grade |
Chemical Composition |
|
Q890D |
The Element Max (%) |
|
C |
Si |
Mn |
P |
S |
Cu |
Cr |
Ni |
Mo |
B |
V |
Nb |
Ti |
|
0.20 |
0.80 |
2.00 |
0.025 |
0.015 |
0.50 |
1.50 |
2.00 |
0.70 |
0.0050 |
0.12 |
0.06 |
0.05 |
GBT 16270 Q890D Mechanical Property
|
Grade |
Mechanical Property |
|
Q890D |
Yield Strength
mm
Min(Mpa) |
Tensile Strength
mm
Min(Mpa) |
Elongation
Min,% |
|
|
|
≤50 |
＞50
|
100 |
＞100
|
150 |
≤50 |
＞50
|
100 |
＞
100
|
150 |
11 |
|
890 |
830 |
- |
940-1100 |
880-1100 |
- |
Q890D quenched and tempered high-strength steel is designed with low carbon equivalent comp osition and it also has good welding performance. Besides, the shot blasting treatment before quenching of the steel plate, the heating of the radiant tube of the quenching furnace and the control of no oxidizing atmosphere make the steel plate has good surface quality. Meanwhile, the roller table for the quenching machine Design, partition water supply cooling make the steel plate quality is uniform, and also has a good shape.
