EN10025-6 specifies requirements for flat products of high yield strength alloy special steels. The qualities of S960QL are given in the below tables (chemical composition and mechanical properties), and S960QL is supplied in the quenched and tempered condition.
EN10025-6 S960QL specified in the standard are applicable to hot-rolled flat products with a minimum nominal thickness of 3 mm and a maximum nominal thickness ≤ 50 mm, and after quenching and tempering,
EN10025-6 S960QL has a specified minimum yield strength of 960MPa.
EN10025-6 S960QL Chemical Composition
|
Grade |
Chemical Composition |
|
S960QL |
The Element Max (%) |
|
C |
Si |
Mn |
P |
S |
Nb |
V |
Ti |
Zr |
Cr |
Ni |
Mo |
Cu |
N |
|
0.22 |
0.86 |
1.80 |
0.030 |
0.017 |
0.07 |
0.14 |
0.07 |
0.17 |
1.60 |
2.1 |
0.74 |
0.55 |
0.016 |
EN10025-6 S960QL Mechanical Property
|
Grade |
Mechanical Property |
|
S960QL |
Yield Strength
mm
Min(Mpa) |
Tensile Strength
mm
Min(Mpa) |
Elongation
Min,%
|
|
≥
3
≤
50 |
＞
50
≤
100 |
＞
100
≤
150 |
≥
3
≤
50 |
＞
50
≤
100 |
＞
100
≤
150 |
|
960 |
- |
- |
980-1150 |
- |
- |
10 |
EN10025-6 S960QL does not have unlimited suitability for the various welding processes, since the behaviour of a steel during and after welding depends not only on the material but also on the dimensions and shape and on the manufacturing and service conditions of the components. With increasing product thickness and strength level cold cracking can occur. Cold cracking is caused by the following factors in combination:
− the amount of diffusible hydrogen in the weld metal;
− a brittle structure of the heat affected zone;
− significant tensile stress concentrations in the welded joint.
