ASTM A387 Grade 22 Class 2 is in the standard ASTM A-387/A-387M . A387 Grade 22 Class 2 is a kind of Cr-Mo-alloy steel plates material used to fabric high temperature pressure vessels. A387 have ten grades or levels. They are : grade 2 , grade 12 , grade 11 , grade 22 , grade 22L , grade 21 , grade 21L, grade 5 , grade 9 , grade 91 . Because of the good property , A387GR11CL1 , A387GR11CL2 , A387GR22CL1 , A387GR22CL2 , A387GR12CL1 , A387GR12CL2 are widely used in the high temperature vessels industry.
Key words:A387 Grade 22 Class 2,ASTM A387 Grade 22 Class 2,A387 Grade 22 Class 2 steel plates,A387 Grade 22 Class 2 Cr-Mo-alloy steel plates, ASTM A387 Grade 22 Class 2 steel plates for fabric high temperature pressure vessels.
ASTM A387 Grade 22 Class 2 steel equivalent material :
JIS G4109 SCM V4-1, JIS G4109 SCM V4-2, DIN 1715 1.738
ASTM A387 Grade 22 Class 2 steel chemical composition(%) :
|
Element |
Mn |
P |
S |
Cr |
Mo |
||||||||||||||
|
Analyse |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
|||||
|
Min |
0.05 |
0.04 |
0.30 |
0.25 |
- |
- |
- |
- |
- |
- |
2.00 |
1.88 |
090 |
0.85 |
|||||
|
Max |
0.15 |
0.15 |
0.60 |
0.66 |
0.035 |
0.035 |
0.035 |
0.035 |
0.50 |
0.50 |
2.50 |
2.62 |
1.10 |
1.15 |
|||||
Note : 1 means Heat analyse ; 2 means Product analyse.
ASTM A387 Grade 22 Class 2 steel Mechanical Properties :
|
ASTMA387 |
Mechanical Requirements |
Hardness |
|||||
|
Tensile Strength Apa (ksi) min |
Yield Strength Mpa (ksi)min |
Elongation min% |
Brinel max HB |
Rockwell max HRB |
|||
|
Grade |
Class 1 |
Class 2 |
Class1 |
Class2 |
Class1/2 |
Class1/2 |
Class1/2 |
|
22 |
415-585 |
515-690 |
205 |
310 |
18 |
201 |
92 |
ASTM A387 Grade 22 Class 2 steel chief application :
ASTM A387 Grade 22 Class 2 pressure vessel steel is widely used in petroleum, chemical industry, power station, boiler, etc, used to make the reactor, heat exchanger, separator, spherical tank, liquefied gas, nuclear reactor pressure vessel, boiler steam drum steam, liquefied petroleum, hydropower station, high pressure pipe.
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