A 299 steel is an important grade under ASTM standard, one class of boiler and pressure vessels. Refer to A299 Chemical composition,A299 Mechanical properties, A299 is suggested that all the plates to be done ultrasonic test and PWHT for improving steel properity and safety when using in high pressure situiations in yard.
A299 Grade A STEEL PLATE
Steel Standard:ASTM A299/A299M
Rolling Type:Boiler steel plate,Pressure vessel steel plate
Thickness:6mm-300mm
Width:1500mm-4200mm
Length:3000mm-18000mm
Heat Treatment:AR/Stress Relieving/Normalized
A299 Grade A,A299GrA steel plate,A299GrA steel sheet for pressure vessel used are specification for carbon steel and Manganese-Silicon.As for A299 Grade A steel plate which produced from steel coil SA299 Grade A and furnished without heat treatment or just with stress relieving only,the additional requirements,including additional testing requirements and the reporting of additional test results shall be applied for A20/A20M steel standard.
Chemical composition for A299 Grade A steel plate
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A299 Grade A Chemical Composition |
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|
Grade |
The Element Max (%) |
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|
C |
Si |
Mn |
P |
S |
Mo |
|
|
A299 GR.A |
0.28-0.30 |
0.13-0.45 |
0.84 -1.62 |
0.035 |
0.035 |
- |
Carbon Equivalent: Ceq = 【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%
Mechnical property for A299 Grade A steel plate:
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Grade |
A299 Grade A Mechanical Property |
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|
Thickness |
Yield |
Tensile |
Elongation |
|
|
A299 GR.A |
mm |
Min Mpa |
Mpa |
Min % |
|
t≦50 |
275-290 |
515-655 |
19 |
|
|
50<t≦200 |
275-290 |
515-655 |
19 |
|
