P690Q and P690QH pressure vessel steel plate
Source：Yusheng steel
Under specification EN 10028_6, pressure vessel steel plate and sheet P690Q and P690QH belongs to Weldable fine grain steel.
These two steel grades shall be done Quenched and Tempered heat treatment when rolling.Owning to these steel plates P690Q
and P690QH rolled under higher strength level,sometimes cold cracking can occur with increasing steel plates’ thickness and s
trength,so our mill would provide our end users with the data on suitable welding conditions.
For these boiler steel plate and sheet P690Q and P690QH should bear the low temperature liquid flowing and surroundings,steel
plates P690Q have to be done low temperature impacting test at minus 20 centi degree,and steel plates P690QH also have to be
done this test at minus 20 centi degree.Else High temperature tensile test is necessary for boiler steel sheet P690QH.
Mechanical properties for P690QH pressure vessel steel plate:
|
Yield strength (Mpa) |
Tensile strength (Mpa) | |||
|
t≤50 |
50<t≤100 |
100<t |
t≤100 |
100<t |
|
690 |
670 |
630 |
770-940 |
720-900 |
Chemical composition of cast analysis for P690QH boiler steel plate (Max %):
C Si Mn P S N B Cr 0.20 0.80 1.70 0.025 0.015 0.015 0.005 1.50 Mo Cu Nb Ni Ti V Zr 0.70 0.30 0.06 2.50 0.05 0.12 0.15
ASTM A515 Gr.70|ASME SA515 Gr.70N- ASTM A515 Gr.65|ASME SA515 Gr.65|A515Gr 65N
- A515 Gr.60|SA515 Gr.60|A515 Gr.60N
- A515Gr60,A515 Grade 65,A515 Gr.70 boiler steel plate
- SA387 Grade 11 CL 1 SA387 Grade 11 CL 2 A387 Grade 11 CL1 A387 Grade 11 CL2
- SA387 Grade 12 CL 1 SA387 Grade 12 CL 2 A387 Grade 12 CL1 A387 Grade 12 CL2