Accreditation Administration System:
EN10025_6 S690Q is a kind of high yield strength steel plate with Quenched and Tempered delivery condition,which
intended for structural parts under High strenght situiation.
Relative Grades: EN10025 S460Q|S460QL|S460QL1|S690Q|S690QL|S690QL1|S890Q|S890QL|S890QL1|S960Q|
S960QL
All the grades can be delivered in the following qualitied as indicated in customer’s order:
① S690Q with specified minimum values of impact energy at temperature not lpwer than -20 centidegree.
② S690QL with specified minimum values of impact energy at temperature not lpwer than -40 centidegree.
③ S690QL1 with specified minimum values of impact energy at temperature not lpwer than -60 centidegree.(exclusion of S960)
Now we foucs on the explaination of Grade S690Q,S690QL and S690QL1 in the below table:
|
EN10025-6 | |||||
|
Grade |
|
S690Q |
S690QL |
S690QL1 | |
|
Chemical Composition % ≤ |
C |
0.20 | |||
|
Si |
0.80 | ||||
|
Mn |
1.70 | ||||
|
P |
0.025 |
0.020 | |||
|
S |
0.015 |
0.010 | |||
|
N |
0.015 | ||||
|
B |
0.005 | ||||
|
Cr |
1.50 | ||||
|
Cu |
0.50 | ||||
|
Mo |
0.70 | ||||
|
Nb |
0.06 | ||||
|
Ni |
2.0 | ||||
|
Ti |
0.05 | ||||
|
V |
0.12 | ||||
|
Zr |
0.15 | ||||
|
Mechanical Property ≥ |
Yield (Mpa) |
t≤50 |
690 | ||
|
50﹤t≤100 |
650 | ||||
|
100﹤t≤150 |
630 | ||||
|
Tensile (Mpa) |
t≤50 |
770-940 | |||
|
50﹤t≤100 |
760-930 | ||||
|
100﹤t≤150 |
710-900 | ||||
|
Impacting test temperature ℃ |
|
-20 |
-40 |
-60 | |
Comparsion in the chemical elements,yield and tensile strength,the best equvilent grades in Chinese standard (GB)
shall be Q690D,Q690E,Q890D and Q890E.
