Hot-Rolled Shipbuilding Board

Products Description The Execution Standards of Hot-Rolled Shipbuilding Board In the realm of shipbuilding, the hot-rolled shipbuilding board plays a crucial role, and its quality and performance are directly related to the safety and reliability of ships. Therefore, strict execution standards...

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Description

Products Description

Hot - Rolled Shipbuilding Board

Material Characteristics

Surface Quality

Hot - rolled shipbuilding boards usually have a characteristic scale - like surface finish due to the oxidation that occurs during the hot - rolling process. This scale can provide some protection against corrosion initially but may need to be removed depending on the application and subsequent surface treatment requirements. The surface may also have some minor irregularities, but within the specified tolerances for shipbuilding materials.

Mechanical Properties

They exhibit a good combination of strength and ductility. The yield strength can range from around 235 MPa for mild - strength shipbuilding steels to higher values for high - strength grades. The tensile strength typically varies from 400 - 630 MPa, depending on the specific grade and alloy composition. The elongation at break is usually in the range of 15% - 30%, allowing for sufficient deformability during fabrication and in - service conditions.

Manufacturing Process

Heating and Rolling

The process begins with heating the steel slab to a high temperature (usually above 1000 °C) in a reheating furnace. This high temperature makes the steel more malleable. The heated slab is then passed through a series of rolling mills, where it is gradually reduced in thickness and elongated. The rolling is carried out in multiple passes to achieve the desired final thickness and mechanical properties. The rolling speed and reduction ratio are carefully controlled to ensure uniformity and quality.

Cooling and Finishing

After rolling, the hot - rolled shipbuilding board is cooled at a controlled rate. This cooling process can affect the microstructure and mechanical properties of the steel. Some grades may require accelerated cooling or specific cooling patterns to achieve the desired hardness and strength. Once cooled, the board may undergo further finishing operations such as cutting to length, edge trimming, and inspection for surface defects.

Applications in Shipbuilding

Hull Construction

Hot - rolled shipbuilding boards are extensively used in the construction of the ship's hull. They are used for various parts such as the bottom shell, side shells, and deck plating. Their strength and ductility make them suitable for withstanding the static and dynamic loads experienced by the ship during its operation. They can be easily fabricated and welded to form the complex shapes required for the hull structure.

Structural Components

They are also used for manufacturing internal structural components within the ship, including bulkheads, frames, and stiffeners. Bulkheads divide the ship's interior into compartments, providing safety and stability. Frames and stiffeners add rigidity to the hull and support the overall structure. The ability of hot - rolled shipbuilding boards to be formed and welded into different configurations makes them ideal for these applications.

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Shipbuilding Steel Plate/Marine Steel Plate/Vessel Steel Sheet/Structural Ship Plate
Standard	CCS,ABS,GL,BV,DNV,NK,LR,KR,RINA
Grade	A/B/D/E,A32/D32/E32/F32,A36/D36/E36/F36,A40/D40/E40/F40,A131A/B/D/E/AH32/DH32/EH32/AH36/DH36/EH36/AH40/DH40/EH40,NVA420/D420/E420,NVA460/D460/E460,NVA500/D500/E500,NVA550/D550/E550….
Thickness	3-100mm
Width	1000-3000mm (1000-2200mm usually used)
Length	1000-12000mm or as your request
Surface	Clean, finishing,blasting and painting according to customer requirement
DeliveryStates	Hot-rolled, Controlled rolling, Normalizing, Annealing, Tempering,Quenching, N+T, Q+T,and other delivery states are available as required
Certificate	API,ISO,SGS,BV,CE etc
Quality	MTC will be provided with goods, third part inspection is acceptable, for example BV,SGS.
Package	Standard export seaworthy package,suit for all kinds of transport,or as required.
ContainerSize	20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High)
	40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High)
Trade term	Ex-Work,FOB,CNF,CFR,CIF,etc
Application	Widely used in a variety of architectural and engineering structures,such as1.) metal constructions such as buildings,bridges,ships;2.) transmission tower, reaction tower;3.) lifting transportation machinery;