SA662 Grade B and C are ASME-spec carbon-manganese-silicon steel plates for moderate to low-temperature pressure vessels, differing mainly in strength levels (Grade C is stronger) and processing; Grade C often requires normalization for refined microstructure, while Grade B offers good weldability for fabrication, both serving similar applications like boilers and tanks.
Supplementary Technology: HIC Test|NACE MR0175|Z15|Z25|Z35|S1|S2|S3|S4.1
S5 | S6 | S8 | S9| S11 | S12 | S17
Thickness: 6MM to 300MM,
Width: 1500mm to 4050mm,
Length: 3000mm to 15000mm
SA662 grade B
|
Composition( Max-A, Min-I) |
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|
SA662 Grade B/ SA662 GrB |
C |
A:0.19 |
|
0.85-1.50 |
||
|
0.15-0.40 |
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|
P |
0.035 |
|
|
S |
0.035 |
SA662 grade C
|
SA662 grade C |
|||||
|
C |
P |
S |
|||
|
SA662 grade C |
0.24 |
0.92-1.72 |
0.035 |
0.035 |
0.13-0.55 |
Carbon Equivalent: Ceq=【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%
SA662 grade B
|
SA662 Grade B/ SA662 GrB |
450-585 |
|
|
275 |
||
|
20% |
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|
|
SA662 grade C
|
SA662 grade C |
||||
|
SA662 grade C |
||||
|
200 |
295 |
485-620 |
18 |
|
|
50 |
22 |
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Think of them as different strength levels for the same type of job (pressure vessels). Grade B is a good all-rounder, while Grade C offers higher strength and toughness for more demanding applications, achieved through stricter processing like normalization.
