BV Steels are types of structural steel which are standardized by the American Bureau of Shipping for use in shipbuilding.BV steels come many grades in ordinary-strength and two levels of higher-strength specifications.
BV Grade A shipbuilding Steel Application:
BV A grades of steel plate are almost exclusively used in the Shipbuilding Industry for the construction of structural parts of ships, barges and marine equipment. These grades are certified by BV – American Bureau of Shipping.
BV Grade A Steel Grade Specification:
Thickness: 4mm to 260mm,
Width: 1000mm to 4000mm
Length: 3000mm to 18000mm.
BV A Ship Steel Delivery Conditions:
BV A Delivery Condition: AR(As hot rolled only), TMCP, Q+T(Quenching+Tempering), N(Normalizing),CR( Control rolled only)
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BV A normal Strength Chemical Composition in hot Rolled |
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Grade |
The Element Max (%) |
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C |
Si |
Mn |
P |
S |
Al |
N |
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BV A |
0.21 |
0.50 |
2.5*C |
0.035 |
0.035 |
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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】%
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BV A normal strength property in hot Rolled |
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Grade |
|
Mechanical Property |
Charpy V Impact Test |
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Thickness |
Yield |
Tensile |
Elongation |
Degree |
Energy 1 |
Energy 2 |
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|
BV A |
mm |
Min Mpa |
Mpa |
Min % |
20 |
J |
J |
|
t≤50 |
235 |
400-520 |
22% |
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|
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50＜t≤70 |
235 |
400-520 |
22% |
24 |
34 |
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70＜t≤100 |
235 |
400-520 |
22% |
27 |
41 |
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Note: Energy 1 is transverse impact test, Energy 2 is longitudinal |
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