LR-A Ship Classification Society Ship Plate, LR/A Ship Plate Specification, LRA Marine Steel Plate

LR-A Ship Classification Society Ship Plate, LR/A Ship Plate Specification, LRA Marine Steel Plate

LR-A is a British classification society certified ship plate, LR-A ship plate is suitable for the manufacture of ship hull structures, docks, oil production platforms, marine transmission pipelines, coastal power plants, dock facilities and other structural parts in ocean-going, coastal and inland navigation areas.

General strength ship plates: A, B, D, E. High-strength shipboard: AH32, AH36, AH40, DH32, DH36, DH40, EH32, EH36, EH40, FH36 and ultra-high-strength shipboard DH460, EH460, EH550, EH690, etc. Thickness: 3-80mm, width 1500-4000mm, length 4000-19000mm. Certified by the world's nine major classification societies (CCS, ABS, VL, LR, BV, NK, KR, RINA, RS).

LR - Lloyd's Register of Shipping

Llyod's Register, or LR, is a classification society that provides commercial and other technical services to the marine industry. Founded in 1760, it is the holding company of the Lloyd's Register Foundation, a worldwide, independent charitable organisation based in the United Kingdom that aims to protect life and property on land, at sea and in the air through its extensive research and innovative global technologies in the fields of science, aviation and engineering.

In the marine sector, the organization aims to provide long-term services for the management of clients' vessels and offshore structures to maximize productivity and eliminate redundancies, while prioritizing maritime safety issues and marine environmental regulations. In addition, the organization operates globally through its international staff, assisting the customer base in identifying operational risks by conducting surveys.

With branches in more than 182 countries, it assists clients in the construction and operation of their maritime assets while ensuring maximum technological competitiveness and compliance with maritime safety and effectiveness through its classification standards and operating rules.

Mechanical properties and chemical composition of LR-A ship plates

General strength: mechanical properties and chemical composition of hull structural steel

Steel grade

Yield point

σs(MPa) is not less than

tensile strength

σb(MPa)

Elongation σ%

Not less than

carbon

C

manganese

Mn

silicon

Si

sulfur

S

phosphorus

P

A

235

400-520

22

≤0.21

≥2.5C

≤0.5

≤0.035

≤0.035

B

≤0.21

≥0.80

≤0.35

D

≤0.21

≥0.60

≤0.35

E

≤0.18

≥0.70

≤0.35

Hull structural steel according to the quality of A, B, C, D four grades of the plate A, B grade steel plate belong to the general strength plate, the chemical composition of Mn content is very different, there is no other gap in mechanical properties, yield and tensile strength are the same, the difference is the experimental temperature of impact energy, grade A is 20 degrees, grade B is 0 degrees. Obviously, the B class is relatively better.