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ASTM A131 AH32 DH32 EH32 FH32 Shipbuilding Steel Plate


Higher strength- Grade AH, DH ,EH and FH witha specified minimum yield point of 46 ksi(315Mpa),51ksi(350Mpa) or 57 ksi(390Mpa) Shapes and bars are normally available as Grade A,AH32,and AH36.Other grades may be furnished by agreement between purchaser and the manufacturer.

Brief introduction of marine steel plate AH/DH/EH32
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. The general strength steel s of the China Classification Society are divided into four quality grades: A B D and E.

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
Higher strength- Grade AH, DH ,EH and FH witha specified minimum yield point of 46 ksi(315Mpa),51ksi(350Mpa) or 57 ksi(390Mpa)
Shapes and bars are normally available as Grade A,AH32,and AH36.Other grades may be furnished by agreement between purchaser and the manufacturer.

Shipbuilding is central to America’s identity and American ingenuity shines in its submarines, yachts, cruise ships, and aircraft carriers. Great ships start with high-quality marine grade steel plate and Gnee is proud to supply the American shipbuilding industry with marine and offshore steel that’s corrosion-resistant and tough, demonstrating decreased brittleness, even in cold temperatures, and increased strength to resist force trauma and vibration. All of our marine grade plate meets the standards set by ABS (American Bureau of Shipbuilding), ASTM, and API (American Petroleum Institute). We’re a trusted supplier of marine & offshore steel plate across world and service shipbuilders

Specifications range
Thickness:2.5-120mm
Width:1000-3000mm
Length: As request

 
Chemical composition and mechanical properties
Chemical Requirement for Higher-Strength Structural Steel
  AH32/DH32/EH32 
C 0.18
Mn 0.90-1.60
Si 0.10-0.50
P 0.035
S 0.035
Al min 0.015
Cb 0.02-0.05
V 0.05-0.10
Ti 0.02
Cu 0.35
Cr 0.20
Ni 0.40
Mo 0.08
N -

Tensile Requirement for Ordinary-Strength and Higher-Strength Structural Steel
Grade Tensile Strength ksi(Mpa) Yield Strength min ksi(Mpa) Elongation in 8 in (200mm) % Elongation in 2 in (50mm) min %
Higher strength  
AH32 DH32 EH32  FH32 71-90(190-620) 51(355( 19 22

Keywords: ASTM A131 AH32 DH32 EH32 FH32 Shipbuilding Steel Plate

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