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 A chemical composition:
|
|
Thickness |
C |
Mn |
Si |
P max |
S max |
|
A299 Grade A |
≤25mm |
0.26 |
0.9-1.4 |
0.13-0.45 |
0.025 |
0.025 |
|
>25mm |
0.28 |
0.9-1.5 |
ASTM A299 Grade A mechanical properties:
|
|
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 A |
≤25mm |
515~655
(75~95) |
290(42) |
19 |
- |
-20,40,-60 |
|
>25mm |
275(40) |
16 |
A299 Grade A is a alloy grade of standard ASTM A299M “Standard Specification for Pressure Vessel Plates, Carbon Steel, Manganese-Silicon”. The maximum thickness of plates ASTM A299 Gr. A is limited only by the capacity of the composition to meet the specified mechanical property requirements. The steel ASTM A299 Grade A shall be killed and shall conform to the fine austenitic grain size requirement of Specification A20/A20M.
Supplementary requirements for plates ASTM A299 Grade A shall apply for use at the option of the purchaser such as : S3. Simulated Post-Weld Heat Treatment of Mechanical, S5. Charpy V-Notch Impact Test, S6. Drop Weight Test and Ultrasonic Examination etc.
