ASTM A738 is a kind of C-Mn-Si steel plates material used to fabric middle or low temperature pressure vessels. Obviously, A738 is divided into three grades or levels :A738 Gr. A, A738 Gr. B, A738 Gr. C .In order to meet the property requirement of ASTM A738/A738M standard, this material must be done heat-treatment.
Standard: ASTM A738/A738M
Steel Grade : A738 Grade A, A738 Grade B, A738 Grade C
Thickness :3mm -500mm
Width :1000mm-4000mm
Length :1000mm-18000mm
MOQ: 1 PC
Delivery time : Promptly ( Stock) or 10-40 days (Production)
Stock : Available
MTC: Available
Payment Term : T/T or L/C At sight .
ASTM A738 steel chemical composition (%):
|
Compostion |
A738 Grade A |
A738 Grade B |
A738 Grade C |
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|
C≤① |
0.24 |
0.20 |
0.20 |
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|
Mn |
Heat analyse |
Thickness≤65mm |
≤1.50 |
0.90~1.50 |
≤1.50 |
|
|
Thickness＞65mm |
≤1.60 |
0.90~1.60 |
≤1.60 |
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|
Product analyse |
Thickness≤65mm |
≤1.62 |
0.84~1.62 |
≤1.62 |
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|
Thickness＞65mm |
≤1.72 |
0.84~1.72 |
≤1.72 |
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|
P≤① |
0.035 |
0.030 |
0.025 |
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|
S≤① |
0.035 |
0.030 |
0.025 |
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|
Si |
Heat analyse |
0.15~0.50 |
0.15~0.55 |
0.15~0.50 |
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|
Product analyse |
0.13~0.55 |
0.13~0.60 |
0.13~0.55 |
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|
Cu ≤ |
Heat analyse |
0.35 |
0.35 |
0.35 |
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|
Product analyse |
0.38 |
0.38 |
0.38 |
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|
Ni ≤ |
Heat analyse |
0.50 |
0.60 |
0.50 |
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|
Product analyse |
0.53 |
0.63 |
0.53 |
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|
Cr ≤ |
Heat analyse |
0.25 |
0.30 |
0.25 |
||
|
Product analyse |
0.29 |
0.34 |
0.29 |
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|
Mo ≤ |
Heat analyse |
Thickness≤40mm |
0.08 |
0.20 |
0.08 |
|
|
Thickness＞40mm |
0.08 |
0.30 |
0.08 |
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|
Product analyse |
Thickness≤40mm |
0.09 |
0.21 |
0.09 |
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|
Thickness＞40mm |
0.09 |
0.33 |
0.09 |
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|
V ≤ |
Heat analyse |
0.07② |
0.07 |
0.05 |
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|
Product analyse |
0.08② |
0.08 |
0.05 |
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|
Nb ≤ |
Heat analyse |
0.04② |
0.04 |
③ |
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|
Product analyse |
0.05② |
0.05 |
③ |
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|
Nb+V ≤ |
Heat analyse |
0.08② |
0.08 |
③ |
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|
Product analyse |
0.10② |
0.10 |
③ |
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① means be suitable for both heat analyse and product analyse
② After agreement,can add V and Nb
③ For Grade C, Nb is not the required composition
Related products: ASTM A738 Grade A, ASTM A738 Grade B, ASTM A738 Grade C
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