ABS Grade B Marine Steel Plate

ABS for American Bureau of Shipping is also known as A131, which is used almost exclusively in shipbuilding. It has a minimum yield of 34ksi(235Mpa). It is used in barges, ship construction and marine equipment.

Grade A steel is the impact force subjected to normal temperature(20 ° C).
Grade B steel impact force at  0 ° C
Grade D steel impact force at -20 ° C
Grade E steel impact force at -40 ° 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

Steel grade	C	Si	Mn	P	S	Als
Grade A	≤0.21	≤0.50	≥2.5C	≤0.035	≤0.035	-
Grade B	≤0.21	≤0.35	0.8-1.2	≤0.035	≤0.035	-
Grade D	≤0.21	≤0.35	0.6-1.2	≤0.035	≤0.035	≥0.015
Grade E	≤0.18	≤0.35	0.7-1.2	≤0.035	≤0.035	≥0.015

Processing for Different Grades

Grade A and B
The general strength of grade A and B shipbuilding steel plates can meet the requirements of process and mechanical properties through ordinary rolling, so the production process is relatively simple.

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	Thickness/mm	Yield point/MPa	Tensile point /MPa	Elongation/%	Temperature/° C	V-type impact test
						Akv/J
						Vertical	Horizontal
Grade A	≤50	≥235	400-490	≥22	-	-	-
Grade B	≤50	≥235	400-490	≥22	0	≥27	≥20
Grade D	≤50	≥235	400-490	≥22	-10	≥27	≥20
Grade E	≤50	≥235	400-490	≥22	-40	≥27	≥20