ABS DQ 70 steel plate is a high-strength structural steel plate that meets the standards set by the American Bureau of Shipping (ABS). This grade of steel plate is primarily designed for use in marine structures and marine applications where superior strength and toughness are critical. The "DQ 70" mark indicates a minimum yield strength of 690 megapascals (MPa), which means it has excellent resistance to deformation under heavy loads. ABS DQ 70 steel plate has excellent weldability and formability, allowing for efficient manufacturing and construction processes. It is used in the construction of offshore drilling rigs, platforms and other critical marine structures that require superior strength, durability and resistance to harsh operating environments.
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AB/DQ70 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 |
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AB/DQ70 |
0.20 |
0.55 |
1.7 |
0.030 |
0.030 |
0.02 |
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AB/DQ70 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 |
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Min Mpa |
Mpa |
Min % |
-20 |
J |
J |
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AB/DQ70 |
690 |
770-940 |
14 |
41 |
62 |
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Note: Energy 1 is transverse impact test, Energy 2 is longitudinal |
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Equivalent steel grade of AB/DQ70 |
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DNV |
GL |
LR |
BV |
CCS |
NK |
KR |
RINA |
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NV D690 |
GL-D690 |
LR/DH69 |
BV/D690 |
CCS/D690 |
K D70 |
R D70 |
RI/D690 |
Related steel grades: AB/DQ63, AB/DQ56, AB/DQ51, AB/DQ47
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ABS Steel Plate Grade Supplier |
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General Strength |
AB/A |
AB/B |
AB/D |
AB/E |
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High Strength |
AB/AH32 |
AB/DH32 |
AB/EH32 |
AB/FH32 |
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AB/AH36 |
AB/DH36 |
AB/EH36 |
AB/FH36 |
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AB/AH40 |
AB/DH40 |
AB/EH40 |
AB/FH40 |
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Extra Strength |
AB/AQ43 |
AB/DQ43 |
AB/EQ43 |
AB/FQ43 |
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AB/AQ47 |
AB/DQ47 |
AB/EQ47 |
AB/FQ47 |
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AB/AQ51 |
AB/DQ51 |
AB/EQ51 |
AB/FQ51 |
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AB/AQ56 |
AB/DQ56 |
AB/EQ56 |
AB/FQ56 |
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AB/AQ63 |
AB/DQ63 |
AB/EQ63 |
AB/FQ63 |
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AB/AQ70 |
AB/DQ70 |
AB/EQ70 |
AB/FQ70 |
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