ASTM A517 Grade A and ASTM A533 Grade A are distinct quenched & tempered alloy steels for pressure vessels, with A517 being a higher strength, general-purpose Q&T plate (often with Cr-Mo-B additions), while A533 Grade A is a specific manganese-molybdenum (Mn-Mo) alloy, known for excellent toughness, often called "nuclear grade" for heavy reactors, differing primarily in alloy composition and specific strength/toughness targets, though both offer high performance.
Chemical Composition
A517 grade A Chemical Composition
|
A517 grade A Chemical Composition |
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|
Grade |
The Element Max (%) |
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|
C |
Si |
Mn |
P |
S |
|
|
A517 grade A |
0.13-0.23 |
0.34-0.86 |
0.74-1.20 |
0.035 |
0.035 |
|
Cr |
Mo |
B |
Zr |
|
|
|
0.46-0.84 |
0.15-0.31 |
0.0025 |
0.04-0.16 |
|
|
A533 grade A steel chemical composition
|
GradeA |
C≤ |
Mn |
P≤ |
S≤ |
Si |
Ni |
Mo |
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|
Heat |
Product |
Heat |
Product |
Heat |
Product |
Heat |
Product |
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|
A533 Gr A |
0.25 |
1.15~1.50 |
1.07~1.62 |
0.035 |
0.035 |
0.15~0.40 |
0.13~0.45 |
- |
- |
0.45~0.60 |
0.41~0.64 |
Mechanical Property
A517 grade A Mechanical Property
|
Grade |
|
A517 grade A Mechanical Property |
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|
Thickness |
Yield |
Tensile |
Elongation |
|
|
A517 grade A |
mm |
Min Mpa |
Mpa |
Min % |
|
6-65 |
690 |
795-930 |
16% |
|
|
65-150 |
620 |
725-930 |
14% |
|
A533 Gr A Mechanical properties
|
Grade A |
Yield strength |
tensile strength |
temperature |
Elongation |
|
quenching and tempering |
690～825 |
≥585 |
-196℃ |
≥0.38 |
|
quenching and tempering |
690～825 |
≥585 |
-170℃ |
≥0.38 |
ASTM A517 Grade A
Type: High-Strength, Quenched & Tempered Alloy Steel Plate.
Primary Use: Fusion-welded boilers and general pressure vessels.
Key Feature: Delivers high tensile strength, with specific grades (like A, B, E) offering varying alloy compositions and properties.
Alloy: Grade A specifically includes elements like Chromium (Cr), Molybdenum (Mo), and Boron (B) for enhanced properties.
ASTM A533 Grade A
Type: Low Alloy Steel Plate, Quenched & Tempered (Class 1 is normalized, Class 2 Q&T).
Primary Use: Heavy-duty pressure vessels, especially in nuclear applications, due to superior toughness.
Key Feature: Known as "nuclear grade" for its excellent notch toughness and good weldability.
Alloy: A manganese-molybdenum (Mn-Mo) alloy, containing carbon, manganese, silicon, and molybdenum.
