ABS DQ56 and DQ63 are both high-strength, quenched and tempered (DQ) shipbuilding steels defined by the American Bureau of Shipping (ABS), differing primarily in yield strength. DQ63 offers a higher minimum yield strength compared to DQ56. Both are used for critical structural, offshore, and shipbuilding applications requiring superior toughness.
ABS DQ56: Higher-strength steel (560 MPa yield) used in specialized maritime construction for improved strength-to-weight ratios.
ABS DQ63: Extra-high-strength steel (630 MPa yield) used when maximum strength is required for heavily loaded ship structural components.
Common Applications: Both are utilized for hull structures, decks, and offshore platforms.
Chemical Composition
|
ABS DQ56 Extra high Strength Chemical Composition in Tempering and Quenching |
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|
Grade |
The Element Max (%) |
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|
C |
Si |
Mn |
P |
S |
N |
|
|
ABS DQ56 |
0.20 |
0.55 |
1.7 |
0.030 |
0.030 |
0.02 |
|
ABS DQ63 Extra high Strength Chemical Composition in Tempering and Quenching |
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|
Grade |
The Element Max (%) |
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|
C |
Si |
Mn |
P |
S |
N |
|
|
ABS DQ63 |
0.20 |
0.55 |
1.7 |
0.030 |
0.030 |
0.02 |
Mechanical Property
|
ABS DQ56 Extra high strength property in tempering and quenching |
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|
Grade |
Mechanical Property |
Charpy V Impact Test |
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|
Yield |
Tensile |
Elongation |
Degree |
Energy 1 |
Energy 2 |
|
|
Min Mpa |
Mpa |
Min % |
-20 |
J |
J |
|
|
ABS DQ56 |
550 |
670-835 |
16 |
37 |
55 |
|
|
Note: Energy 1 is transverse impact test, Energy 2 is longitudinal |
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|
ABS DQ63Extra high strength property in tempering and quenching |
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|
Grade |
Mechanical Property |
Charpy V Impact Test |
||||
|
Yield |
Tensile |
Elongation |
Degree |
Energy 1 |
Energy 2 |
|
|
Min Mpa |
Mpa |
Min % |
-20 |
J |
J |
|
|
ABS DQ63 |
620 |
720-890 |
15 |
41 |
62 |
|
|
Note: Energy 1 is transverse impact test, Energy 2 is longitudinal |
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