Under steel standard ASTM A517/A517M,high yield strength steel plate A517 Grade A and A517 Grade B are mainly
used for manufacturing pressure vessels and tanks.For improving steel property and using in special surroundings,
steel grade A517 Grade A and A517 Grade B both contain some alloy elements,such as Copper,Molybdenum,
Chromlum and so on.Both these two high tensile strength steel grades A517 Grade A and A517 Grade B has owned
minimum yield strength at 690 Mpa for the thickness belows 65mm.For the thickness above 65mm,the value shall
be above 620 Mpa.
Pressure vessel steel plates A517 Grade A and A517 Grade B have to be done heat treament as Quenched and
Tempered after production,and Ultrasonic examation should be done according to ASTM A435/A435M or
A578/A578M or A577/A577M.The end user should indicate clearly which level do they need for UT in their
purchase order.For the additional tehcnical requirements,the temperature of Charpy V_notch impacting test shall be
agreeed up between the manufacturer and the purchaser,but shall not be higher than zero centi degree.
Chemical Composition Max Heat Analysis | ||||||||
|
C |
Mn |
P |
S |
Si |
Ni |
Cr | |
A517 Grade A |
0.15/0.21 |
1.80/1.10 |
0.035 |
0.035 |
0.40/0.80 |
- |
0.50/0.80 | |
|
Mo |
V |
Ti |
Zr |
Cu |
Nb |
B | |
A517 Grade A |
0.18/0.28 |
- |
- |
0.05/0.15 |
- |
- |
0.0025 |