ASTM A131 Grade A/B Marine Steel plate

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ASTM A131 Grade A/B Marine Steel plate

EN 10025-2 is European standard, EN 10025-2 Carbon Steel is a steel alloy where carbon is the main alloying element.

Carbon steel can be grouped into 3 categories: Low Carbon Steel (also known as Mild Steel), Medium Carbon Steel and High Carbon Steel.

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ASTM A131 is A structural grade of steel plate utilized almost exclusively in the shipbuilding industry. This grade is defined as ordinary strength with specified minimum yield of 34KSI(235Mpa). Applications include barges, marine equipment and ship construction. These grades are also certified by the American Bureau of Shipping(ABS).

This specification covers structural steel plates,shapes,bars and rivets intended primarily for use in ship construction.
Ordinary strength- Grade A B D CS and E with a specified minimum yield point of 34 ksi(235MPa)

Chemical Requirement for Ordinary-Strength Structural Steel:

Element

Grade A

Grade B

Grade D

Grade E

Grade CS

 

Deoxidation and Thickness(t) in mm

 

t>2.0 in(50mm)

t>2.0 in(50mm)

t>1.0 in(50mm)

 

 

C

0.21

0.21

0.21

0.18

0.16

Mn min

2.5XC

0.60

0.60

0.70

1.00

Si

0.50

0.35

0.10-0.35

0.10-0.35

0.10-0.35

P

0.035

0.035

0.035

0.035

0.035

S

0.035

0.035

0.035

0.035

0.035

Ni

-

-

-

 

-

Cr

-

-

-

-

-

Mo

-

-

-

-

-

Cu

-

-

-

-

-

C+Mn/6

0.40

0.40

0.40

0.40

0.40


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 %

Ordinary strength
A B D CS E

58-75(400-520)

34(235)

21

24

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

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