ASTM A131 Grade A/B Marine Steel plate


Structural steel for ship hulls is divided into strength classes
according to its minimum yield strength: general strength
structural steel and high strength structural steel. Maine steel
plate refers to hot rolled steel plate produced in accordance
with the requirements of the classication society for the construction
of ship hull structures.

i

According to different materials and application industries,

the production capacity and particle size range will vary.
Please contact our engineers to customize the equipment for you. Our experts will contact you within 6 hours to discuss your machine and process needs.

Brief introduction of marine steel plate
Marine steel plate refers to structural steel used in ship building. It is considered a marine grade and must be able to resist corrosive effects that are common in a water environment. To achieve this, special alloying elements are added to these grades in order to defend agaist corrosion.While most carbon steel is not suited for marine environments, there are several marine grade carbon steels that have been approved by the different societies for shipbuilding applications.

Structural steel for ship hulls is divided into strength classes according to its minimum yield strength: general strength structural steel and high strength structural steel. Maine steel plate refers to hot rolled steel plate produced in accordance with the requirements of the classication society for the construction of ship hull structures.

There are 9 main classification societies in worldwide.
A.B.S    American Bureau of Shipping
B.V.     Bureau Veritas
C.C.S.   China Classification Society
D.N.V   Det Norske Veritas
G.L.    Germanischer Lloyd
K.R.    Korean Register of Shipping
L.R.    Lloyd’s Register of Shipping
N.K.    Nippon Kaiji Kyokai
R.I.N.A  Registro Italiano Navale



Grade AH32 steel is the impact force subjected to 0 ° C
Grade DH32 steel impact force at  -20 ° C
Grade EH32 steel impact force at -40 ° C
Grade FH32  steel impact force at -60 ° C

Shot blasting service
Shot blasting is a method used to clean or polish steel when enhanced surface finishes are required. Shot blasting is used in almost every industry we serve. Especially in shipbuilding, rail,structural fabrication and more.

Specifications range
Thickness:2.5-120mm
Width:1000-3000mm
Length: As request
 
Chemical composition and mechanical properties
Chemical Composition
Steel grade C Si Mn P S Als
Grade AH32 ≤0.18 ≤0.50 0.9-1.6 ≤0.035 ≤0.035 ≥0.015
Grade DH32 ≤0.18 ≤0.50 0.9-1.6 ≤0.035 ≤0.035 ≥0.015
Grade EH32 ≤0.18 ≤0.50 0.9-1.6 ≤0.035 ≤0.035 ≥0.015
Grade FH32 ≤0.18 ≤0.50 0.9-1.6 ≤0.035 ≤0.035 ≥0.015

Grade D, E (DH32, DH36, EH 32, EH 36)
Grade D and E series (inlcuding AH32/36, DH32, DH36, EH32, EH36) shipbuilding steel plates require good low temperature toughness and good welding performance. The production high-strength shipbuilding steel plate needs to be normalized by means of controlled rolling and controlled cooling or heat treatment processes with more complete equipment. At the same time, the internal steel purity of the supplied billets is required to be high, especially the content of S, P, N, 0 and H in the steel should be strictly controlled.

Alloy Elements Added to Improve Toughness
In order to ensure the performance of high-strength ship plates, micro-alloying technology is adopted. By adding Nb, V, Ti and other alloying elements to the steel, combined with the controlled rolling process, the grain is refined and the toughness is improved.
Direction of Development for Shipbuilding Plate
High strength, high specification, with the ship's large-scale and safety, and changes in coating specifications, the demand for ordinary A-class panels is gradually reduced, and the demand for high-strength panels is increasing, which is concentrated in large ships of 5m wide. Plate, 200-300mm thickness special thick ship board.

Mechanical Properties
Steel grade Yield point/MPa Tensile point /MPa Elongation/% Temperature/° C V-type impact test
Akv/J
≤50MM 50-70MM 70-100MM
Grade AH32 ≥315 440-570 ≥22 0 31/22 38/26 46/31
Grade DH32 ≥315 440-570 ≥22 -20 31/22 38/26 46/31
Grade EH32 ≥315 440-570 ≥22 -40 31/22 38/26 46/31
Grade FH32 ≥315 440-570 ≥22 -60 31/22 38/26 46/31

Application industry

Mechanical

Company's products: stainless steel series, carbon steel series, aluminum series, copper series, galvanized, color coated, coiled materials, seamless pipes, welded pipes, square pipes, torsion pipes, round bars, angle steels, channel steels, I-beams , Hexagonal steel, square steel, flat steel, steel wire, welding rod, flange cutting parts and other stainless steel and high nickel alloy steel. For customers to buy. The products sell well all over the country and are exported to more than 50 countries including the European Union, the United States, Australia, Southeast Asia, and the Middle East. They are widely used in the Three Gorges Project, Capital International Airport, Shanghai Pudong International Airport, the 2008 Olympic Games venues, and China (Hong Kong) Gas International Co., Ltd. natural gas transformation Project, Jinjin Expressway and many other national key projects.

Architecture

Company's products: stainless steel series, carbon steel series, aluminum series, copper series, galvanized, color coated, coiled materials, seamless pipes, welded pipes, square pipes, torsion pipes, round bars, angle steels, channel steels, I-beams , Hexagonal steel, square steel, flat steel, steel wire, welding rod, flange cutting parts and other stainless steel and high nickel alloy steel. For customers to buy. The products sell well all over the country and are exported to more than 50 countries including the European Union, the United States, Australia, Southeast Asia, and the Middle East. They are widely used in the Three Gorges Project, Capital International Airport, Shanghai Pudong International Airport, the 2008 Olympic Games venues, and China (Hong Kong) Gas International Co., Ltd. natural gas transformation Project, Jinjin Expressway and many other national key projects.

Special equipment

Company's products: stainless steel series, carbon steel series, aluminum series, copper series, galvanized, color coated, coiled materials, seamless pipes, welded pipes, square pipes, torsion pipes, round bars, angle steels, channel steels, I-beams , Hexagonal steel, square steel, flat steel, steel wire, welding rod, flange cutting parts and other stainless steel and high nickel alloy steel. For customers to buy. The products sell well all over the country and are exported to more than 50 countries including the European Union, the United States, Australia, Southeast Asia, and the Middle East. They are widely used in the Three Gorges Project, Capital International Airport, Shanghai Pudong International Airport, the 2008 Olympic Games venues, and China (Hong Kong) Gas International Co., Ltd. natural gas transformation Project, Jinjin Expressway and many other national key projects.

Car

Company's products: stainless steel series, carbon steel series, aluminum series, copper series, galvanized, color coated, coiled materials, seamless pipes, welded pipes, square pipes, torsion pipes, round bars, angle steels, channel steels, I-beams , Hexagonal steel, square steel, flat steel, steel wire, welding rod, flange cutting parts and other stainless steel and high nickel alloy steel. For customers to buy. The products sell well all over the country and are exported to more than 50 countries including the European Union, the United States, Australia, Southeast Asia, and the Middle East. They are widely used in the Three Gorges Project, Capital International Airport, Shanghai Pudong International Airport, the 2008 Olympic Games venues, and China (Hong Kong) Gas International Co., Ltd. natural gas transformation Project, Jinjin Expressway and many other national key projects.

Home appliances

Company's products: stainless steel series, carbon steel series, aluminum series, copper series, galvanized, color coated, coiled materials, seamless pipes, welded pipes, square pipes, torsion pipes, round bars, angle steels, channel steels, I-beams , Hexagonal steel, square steel, flat steel, steel wire, welding rod, flange cutting parts and other stainless steel and high nickel alloy steel. For customers to buy. The products sell well all over the country and are exported to more than 50 countries including the European Union, the United States, Australia, Southeast Asia, and the Middle East. They are widely used in the Three Gorges Project, Capital International Airport, Shanghai Pudong International Airport, the 2008 Olympic Games venues, and China (Hong Kong) Gas International Co., Ltd. natural gas transformation Project, Jinjin Expressway and many other national key projects.

Shipbuilding Industry

Company's products: stainless steel series, carbon steel series, aluminum series, copper series, galvanized, color coated, coiled materials, seamless pipes, welded pipes, square pipes, torsion pipes, round bars, angle steels, channel steels, I-beams , Hexagonal steel, square steel, flat steel, steel wire, welding rod, flange cutting parts and other stainless steel and high nickel alloy steel. For customers to buy. The products sell well all over the country and are exported to more than 50 countries including the European Union, the United States, Australia, Southeast Asia, and the Middle East. They are widely used in the Three Gorges Project, Capital International Airport, Shanghai Pudong International Airport, the 2008 Olympic Games venues, and China (Hong Kong) Gas International Co., Ltd. natural gas transformation Project, Jinjin Expressway and many other national key projects.

Specification

    • Commodity name: ASTM A131 Grade A/B Marine Steel plate

    <strong>Structural steel</strong> for ship hulls is divided into strength classes <br> <strong>according to</strong> its minimum yield strength: general strength <br> structural steel and high strength structural steel. Maine steel <br> plate refers to hot rolled steel plate produced in accordance <br> with the requirements of the classication society for the construction <br> of ship hull structures.<br>

    Brief introduction of marine steel plate
    Marine steel plate refers to structural steel used in ship building. It is considered a marine grade and must be able to resist corrosive effects that are common in a water environment. To achieve this, special alloying elements are added to these grades in order to defend agaist corrosion.While most carbon steel is not suited for marine environments, there are several marine grade carbon steels that have been approved by the different societies for shipbuilding applications.

    Structural steel for ship hulls is divided into strength classes according to its minimum yield strength: general strength structural steel and high strength structural steel. Maine steel plate refers to hot rolled steel plate produced in accordance with the requirements of the classication society for the construction of ship hull structures.

    There are 9 main classification societies in worldwide.
    A.B.S    American Bureau of Shipping
    B.V.     Bureau Veritas
    C.C.S.   China Classification Society
    D.N.V   Det Norske Veritas
    G.L.    Germanischer Lloyd
    K.R.    Korean Register of Shipping
    L.R.    Lloyd’s Register of Shipping
    N.K.    Nippon Kaiji Kyokai
    R.I.N.A  Registro Italiano Navale



    Grade AH32 steel is the impact force subjected to 0 ° C
    Grade DH32 steel impact force at  -20 ° C
    Grade EH32 steel impact force at -40 ° C
    Grade FH32  steel impact force at -60 ° C

    Shot blasting service
    Shot blasting is a method used to clean or polish steel when enhanced surface finishes are required. Shot blasting is used in almost every industry we serve. Especially in shipbuilding, rail,structural fabrication and more.

    Specifications range
    Thickness:2.5-120mm
    Width:1000-3000mm
    Length: As request
     
    Chemical composition and mechanical properties
    Chemical Composition
    Steel grade C Si Mn P S Als
    Grade AH32 ≤0.18 ≤0.50 0.9-1.6 ≤0.035 ≤0.035 ≥0.015
    Grade DH32 ≤0.18 ≤0.50 0.9-1.6 ≤0.035 ≤0.035 ≥0.015
    Grade EH32 ≤0.18 ≤0.50 0.9-1.6 ≤0.035 ≤0.035 ≥0.015
    Grade FH32 ≤0.18 ≤0.50 0.9-1.6 ≤0.035 ≤0.035 ≥0.015

    Grade D, E (DH32, DH36, EH 32, EH 36)
    Grade D and E series (inlcuding AH32/36, DH32, DH36, EH32, EH36) shipbuilding steel plates require good low temperature toughness and good welding performance. The production high-strength shipbuilding steel plate needs to be normalized by means of controlled rolling and controlled cooling or heat treatment processes with more complete equipment. At the same time, the internal steel purity of the supplied billets is required to be high, especially the content of S, P, N, 0 and H in the steel should be strictly controlled.

    Alloy Elements Added to Improve Toughness
    In order to ensure the performance of high-strength ship plates, micro-alloying technology is adopted. By adding Nb, V, Ti and other alloying elements to the steel, combined with the controlled rolling process, the grain is refined and the toughness is improved.
    Direction of Development for Shipbuilding Plate
    High strength, high specification, with the ship's large-scale and safety, and changes in coating specifications, the demand for ordinary A-class panels is gradually reduced, and the demand for high-strength panels is increasing, which is concentrated in large ships of 5m wide. Plate, 200-300mm thickness special thick ship board.

    Mechanical Properties
    Steel grade Yield point/MPa Tensile point /MPa Elongation/% Temperature/° C V-type impact test
    Akv/J
    ≤50MM 50-70MM 70-100MM
    Grade AH32 ≥315 440-570 ≥22 0 31/22 38/26 46/31
    Grade DH32 ≥315 440-570 ≥22 -20 31/22 38/26 46/31
    Grade EH32 ≥315 440-570 ≥22 -40 31/22 38/26 46/31
    Grade FH32 ≥315 440-570 ≥22 -60 31/22 38/26 46/31

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