BV A420 high-strength shipbuilding steel grades that meet the stringent requirements of the Bureau Veritas (BV) classification society. These grades offer excellent mechanical properties, corrosion resistance, and weldability, making them suitable for use in the construction of ships, offshore structures, and other marine applications.
Chemical Composition
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BV GRADE A420 extra High Strength Chemical Composition Tempering and Quenching |
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Grade |
The Element Max (%) |
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|
C |
Si |
Mn |
P |
S |
Al(min) |
N |
|
|
BV GRADE A420 |
0.21 |
0.55 |
1.70 |
0.035 |
0.035 |
0.015 |
0.020 |
Crack Sensitivity: Pcm = (C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B)%
Carbon Equivalent: Ceq = 【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%
Mechanical Property
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BV GRADE A420 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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|
BV GRADE A420 |
Min Mpa |
Mpa |
Min % |
0 |
J |
J |
|
420 |
530-680 |
18% |
28 |
42 |
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Note: Energy 1 is transverse impact test, Energy 2 is longitudinal |
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Impact Testing
To ensure the safety and reliability of ships and offshore structures, BV A420 steel undergoes rigorous impact testing. This testing involves subjecting the steel to sudden impacts at low temperatures to assess its ability to absorb energy and resist fracture. The steel must meet specific impact energy requirements to be certified for use in marine applications.
Main Application Scenarios
BV A420 steel is widely used in the construction of ships, offshore platforms, and other marine structures that require high strength and corrosion resistance. It is particularly suitable for use in harsh marine environments where exposure to saltwater, wave action, and other corrosive factors is expected.
