D40 steel is a kind of high-strength and high-toughness Marine structural steel, which is mainly used in large-scale offshore engineering, ship construction and offshore platforms. Its main characteristics are good weldability, low temperature toughness and corrosion resistance, which can meet the requirements of use in extreme Marine environments.

The chemical composition of D40 steel mainly includes carbon (C), silicon (Si), manganese (Mn), sulfur (S), phosphorus (P), chromium (Cr), nickel (Ni), copper (Cu), molybdenum (Mo) and aluminum (Al) and other elements.

E40 steel plate is a kind of high-strength, high-toughness steel, usually used in the manufacture of ships, offshore platforms, petrochemical and other fields of structural parts and welding parts. Its characteristics are as follows:

High strength: E40 steel plate has high tensile strength and yield strength, and can withstand large loads and pressures.
High toughness: the steel plate has good impact toughness and bending properties, and can maintain good toughness and stability in low temperatures or complex environments.
Wear resistance: E40 steel plate after special treatment, high surface hardness, good wear resistance, can extend the service life of the equipment.
Good welding performance: the steel plate has good weldability, and the quality of the welded joint is stable and reliable.
Corrosion resistance: E40 steel plate after special treatment, has good corrosion resistance, can adapt to a variety of complex environments.

AP1 SPEC 2H Gr42, Gr50 steel plate is a kind of high strength, high toughness and good wear resistance steel, usually used in the manufacture of ships, offshore platforms, petrochemical and other fields of structural parts and welding parts. Its specific characteristics are as follows:

High strength: AP1 SPEC 2H Gr42, Gr50 steel plates have high tensile strength and yield strength, and can withstand large loads and pressures.
High toughness: the steel plate has good impact toughness and bending properties, and can maintain good toughness and stability in low temperatures or complex environments.
Wear resistance: AP1 SPEC 2H Gr42, Gr50 steel plate after special treatment, high surface hardness, good wear resistance, can extend the service life of the equipment.
Good welding performance: the steel plate has good weldability, and the quality of the welded joint is stable and reliable.
Corrosion resistance: AP1 SPEC 2H Gr42, Gr50 steel plates are specially treated to have good corrosion resistance and can adapt to a variety of complex environments.

AH36-FH36 (Z15, Z25, Z35) steel plate refers to the high-strength steel plate for hull structure classified according to the standards of China Classification Society (CCS), which is mainly used to manufacture the hull and deck of ocean-going, coastal and inland shipping ships.

AH36-FH36 (Z15, Z25, Z35) steel plate belongs to the Marine engineering equipment and ship special steel plate, its implementation standard is EN10225 YB/Y4283 special technical conditions.

These steel plates not only have high strength and toughness, but also have fatigue resistance, impact resistance, wear resistance, corrosion resistance and easy processing properties, and are widely used in ship decks, pressure elements, offshore platforms, offshore drilling platforms, offshore drilling supports, pillars, leg piles and other fields.

AH32-FH32 (Z15, Z25, Z35) steel plate refers to the high-strength steel plate for hull structure classified according to the standards of China Classification Society (CCS), which is mainly used to manufacture the hull and deck of ocean-going, coastal and inland shipping ships.

AH32-FH32 (Z15, Z25, Z35) steel plate belongs to the Marine engineering equipment and ship special steel plate, its implementation standard is EN10225 YB/Y4283 special technical conditions.

These steel plates not only have high strength and toughness, but also have fatigue resistance, impact resistance, wear resistance, corrosion resistance and easy processing properties, and are widely used in ship decks, pressure elements, offshore platforms, offshore drilling platforms, offshore drilling supports, pillars, leg piles and other fields.

A, B, D, E (Z15, Z25, Z35) steel plates refer to steel plates classified according to the classification standards of low-alloy high-strength structural steel in the Chinese National Standard (GB).

Grade A steel plate: Q235A steel plate is a common low-alloy high-strength structural steel, mainly used in construction, Bridges, ships, vehicles, pipelines and other engineering fields. Its quality grade is Z15, indicating that its minimum tensile strength is 235MPa and its minimum yield strength is 150MPa.

Grade B steel plate: Q235B steel is also a low-alloy high-strength structural steel, mainly used in the manufacture of building structures, Bridges, ships, vehicles and so on. Its quality grade is Z25, indicating that its tensile strength is at least 235MPa and its yield strength is at least 250MPa.

Grade D steel plate: Grade Q345D steel is a high-strength low-alloy structural steel with good low-temperature impact toughness, corrosion resistance and welding properties. Its quality grade is Z35, indicating that its tensile strength is at least 345MPa and its yield strength is at least 350MPa.

Grade E steel plate: Grade Q345E steel is a high-level low-alloy high-strength structural steel with higher strength and low-temperature impact toughness, mainly used in the manufacture of large ships, Bridges, high-rise buildings and so on. Its quality grade is Z15, indicating that its tensile strength is minimum 345MPa and its yield strength is minimum 345MPa.

These steel plates require strict heat treatment and quality control during the manufacturing process to ensure the stability and reliability of their properties. At the same time, according to different engineering needs and uses, you can choose different levels and specifications of steel plates.