ASTM A515 gr.70 steel is a high grade in boiler and pressure vessel steel.ASTM A515 has gr.60, gr.65, gr.70. ASTM A515 gr.70 covers carbon-silicon steel plates primarily for intermediate- and higher-temperature service in welded boilers and other pressure vessels.
ASTM A515 gr.70 chemical composition :
Grade |
C (max) |
Si (max) |
P (max) |
S (max) |
Mn (max) |
||||
|
< 12.5 mm |
12.5< t ≤50mm |
50< t ≤100mm |
100< t ≤200mm |
t>200mm |
|||||
|
A515 gr.70 |
0.31 |
0.33 |
0.35 |
0.35 |
0.35 |
0.15-0.4 |
0.035 |
0.035 |
1.2 |
ASTM A515 gr.70 mechanical properties :
Grade |
Tensile strength Rm for product thickness in mm |
Upper yield stress ReH for product thickness in mm |
Elongation after fracture |
|
A515 gr.70 |
480-620 |
260 |
17/21 |
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