ASTM A 455 steel is a important grade of boiler and pressure vessel steel.ASTM A 455 covers high-tensile strength carbon-manganese steel plates intended for welded pressure vessels.ASTM A 455 is usually made to a semi-killed or capped deoxidation practice; however, at the purchaser's or the steel producer's option, the steel may be made silicon-killed or aluminum-killed.
The following is the A 445 properties:
Grade |
C max |
Si max |
Mn |
P |
S |
Cu min |
V |
Al |
Cr |
Mo max |
N |
Nbmax |
Ni max |
Ti max |
Nb+Ti+V |
|
A 445 |
0.18 |
0.4 |
0.5- |
0.03 |
0.03 |
0.3 |
0.05 |
0.02 |
0.3 |
0.08 |
0.02 |
0.05 |
0.5 |
0.03 |
0.05 |
Grade |
Thickness (mm) |
Tensile strength Rm for product thickness in mm |
Upper yield stress ReH for product thickness in mm |
Elongation after fracture |
|
A 445 |
≤ 16 |
370-490 |
275 |
23 |
|
16-35 |
275 |
|||
|
35-50 |
265 |
|||
|
50-70 |
255 |
|||
|
70-100 |
350-470 |
235 |
||
|
100-150 |
225 |
|||
|
> 150 |
-- |
24 |
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