RINA Grade AH32 Marine Steel Plate

RINA AH32 steel is a kind of hot rolled high tensile strength steel.
Higher-strength RINA shipbuilding steel comes in 12 grades of 3 strengths,
AH32 is one of the grades.
The RINA AH32 grade steel plates have yield strength of 315 MPa),
and ultimate tensile strength of 440-570 MPa.

Category：

Shipbuilding Steel Plate

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Email : sales68@baotecn.com

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Product Description

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

RINA AH32 steel is a kind of hot rolled high tensile strength steel. Higher-strength RINA shipbuilding steel comes in 12 grades of 3 strengths,AH32 is one of the grades. The RINA AH32 grade steel plates have yield strength of 315 MPa), and ultimate tensile strength of 440-570 MPa.
RINA is a founding member of the International Association of Classification Societies(IACS),formed in 1968. The RINA fleet is recognized by approximately 116 international flag authorities. RINA integrated services for the complate shipping cycle including design, building, shipyard management, inspection and testing of materials/components and regular inspections to maintain the class are used by freight, ferries, ro-ro, passenger ships, yachts, cruise ships, navy, LGN and other specialist carrier vessels.
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

Processing for Different Grades
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

Warehouse Storage

The annual production capacity reaches 2 million tons and the annual revenue is more than 8.9 billion yuan. The company has a warehousing base of 40,000 square meters and maintains an inventory of about 250,000 tons all year round. Complete specifications, convenient and fast loading.

Packing and shipping

It is mainly used for quotations and shipments of domestic import and export trade. In addition, it is an agent for profiles, round steel, angle steel, hexagonal steel, square steel, flat steel and steel plates from major steel mills. It mainly serves the needs of import and export customers.

Customer conversation

As a leading steel pipe manufacturing enterprise in the province, it passed the ISO9001 international quality management system certification in 2019 and passed the American Petroleum Institute API audit certification. In 2019, it was rated as an "A-level tax-paying enterprise". In the same year, it won the Liaocheng Mayor's Quality Award and the honorary title of Shandong Famous Brand Product. It was also one of the top 100 steel trading enterprises in China.

Application field

Our company is a integrated industrial and trade enterprises . And we have strong supply capabilities. Our main products include stainless steel, galvanized steel, carbon steel, etc., including steel coils, steel plates, steel pipes, various profile steels, etc., as well as copper, aluminum, titanium and other metal materials. Suitable for construction industry, metallurgical industry, chemical industry, electric power industry, aerospace industry, machinery manufacturing industry, shipbuilding industry, automobile manufacturing industry and other fields.

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Shipbuilding Steel Plate