Basic introduction of CCS DH40 Marine Steel Plate-Chengshun Metal

Shipbuilding mainly purchases CCS DH40 Marine Steel Plate, flat steel, spherical flat steel, equilateral angle steel, unequal angle steel, round steel, pipe rivets, fasteners, paint, etc. for the hull.

CCS DH40 Marine Steel Plate

CCS DH40 Marine Steel Plate can be divided into steel for hull structure and steel for boiler, pressure vessel and mechanical structure.

1. steel for hull structure

All CCS DH40 Marine Steel Plates for hull structures should be produced by steel mills approved by the classification society, and the products that pass the inspection should have the mark of the classification society. Steel can be smelted in open hearth furnace, electric furnace or basic oxygen-blowing converter steelmaking method. If other methods are used, they should be specially approved by the classification society. Tests should also be carried out on the produced steel according to the regulations. The test contents include chemical composition analysis and physical tests. Among them, the physical test items mainly include: tensile test, cold bending test and impact test.

According to the chemical composition and performance, the hull structure materials are divided into two types: general strength hull structure steel and high strength hull structure steel.

1)—General strength CCS DH40 Marine Steel Plate

General strength CCS DH40 Marine Steel Plate is the former marine carbon steel, divided into four grades: A, B, D, and E. Grade A is boiling steel, B satin is killed steel, grade D and E are fully killed fine grain (aluminum treatment) steel, the manganese content in grade E steel is higher than that of D grade steel and the carbon content is lower than D grade steel steel.

At present, general-strength hull structural steel is widely used in the welding of small and medium-sized ships

2) High strength CCS DH40 Marine Steel Plate

High-strength CCS DH40 Marine Steel Plate is also called marine low-alloy steel.

Since the high-strength CCS DH40 Marine Steel Plate is smelted by adding a small amount of alloying elements such as manganese, niobium, vanadium, aluminum and silicon on the basis of general-strength hull structural steel, its strength, mechanical properties, weldability, corrosion resistance The old items such as durability and wear resistance are better than general strength hull structural steel. Although the price of steel itself is expensive, because of the above-mentioned properties, the amount of steel used in shipbuilding can be reduced, thereby reducing the weight of the hull structure and reducing the cost of shipbuilding. The final economic index is similar to that of general-strength hull structural steel .