There are many pressure vessel steels, and the A299 is a manganese-silicon carbon
steel plates for use in welded boilers and other pressure vessels. Katalor can normally supply the material A299 with maximum thickness of plates to 203mm at present.
ASTM A299 Grade B chemical composition:
|
Grade |
Thickness |
C |
Mn |
Si |
P max |
S max |
|
A299 Grade B |
≤25mm |
0.28 |
0.84-1.52 |
0.13-0.45 |
0.025 |
0.025 |
|
>25mm |
0.30 |
0.84-1.62 |
ASTM A299 Grade B mechanical properties:
|
Grade |
Thickness |
Tensile Strength (MPa/KSI) |
Yield Strength (MPa) min |
% Elongation in 2 in.(50mm) min |
% Elongation in 8 in.(200mm) min |
Impacting Test Temperature(°C) |
|
A299 Grade B |
≤25mm |
550~690
(80~100) |
325(47) |
19 |
- |
-20,40,-60 |
|
>25mm |
310(45) |
16 |
ASTM A299 Grade B is a type of manganese-silicon carbon steel plates for use in welded boilers and other pressure vessels. And about the different thickness ≤25mm and over 25mm of A299 Gr. B, the chemical content and mechanical properties are different, the carbon content is 0.3% when plate thickness over 25mm while carbon content is 0.28% when plates THK≤25mm; the min yield strength 310MPa when plate thickness over 25mm while min yield strength 320MPa when plates THK≤25mm
For plates of ASTM A299 Grade B produced from coil and furnished without heat treatment or with stress relieving only, the additional requirements, including additional testing requirements and the reporting of additional test results, of Specification A20/A20M apply. Plates in grade ASTM A299 Grade B with thickness ≤50mm are normally supplied in the as-rolled, or normalized or stress relieved, or both condition. Plates in grade A299 Gr. B in thickness over 50mm shall be normalized condition.
