ASTM A455 steel is a boiler and pressure vessel steel. According to A455 chemical composition, A 455 mechanical properties, A455 plates are normally supplied in the as-rolled condition. A 455 plates may be ordered normalized or stress relieved, or both. ASTM A455 shall conform to the chemical composition requirements. ASTM A455, as represented by the tension test specimens, shall conform to the mechanical property requirements.
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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