1.Application Potential:
A204/A204M specification covers molybdenum-alloy steel plates, intended particularly for welded boilers and other pressure vessels.This standard covers steel A204GrA ,A204GrB andA204GrC .These plates are widely used in the fabrication of boilers and pressure vessels in industries such as shipbuilding, petrochemical and manufacturing.
2.Chemical Composition and Mechnical Property:
Chemical composition
Grade
|
Standard
|
C
|
Mn
|
S
|
P
|
Si
|
A204GrA
|
A204/A204M
|
0.18
|
0.90
|
0.035
|
0.035
|
0.13-0.45
|
A204GrB
|
A204/A204M
|
0.20
|
0.90
|
0.035
|
0.035
|
0.13-0.45
|
Mechnical Property
Grade
|
Tensile strength, ksi [MPa]
|
Yield strength, min,A ksi [MPa]
|
Elongation in 8 in. [200 mm], min, %B
|
Elongation in 2 in. [50 mm], min, %B
|
A204GrA
|
65–85 [450–585]
|
37 [255]
|
19
|
23
|
A204GrB
|
70–90 [485–620]
|
40 [275]
|
17
|
21
|
3.A204GrA,A204GrB have different minimum strength levels as 450MPa and 485MPa separately,where the main difference between them exist.For more Supplementary requirements such as S1. Vacuum Treatment,S2. Product Analysis and so on,do not hesitate to contact us,we will do our best to satisfy you.
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