Performance of ship plate in high-temperature environment

TAGS: plate | hightemperature | conditions |

The performance of steel plates for ships in high-temperature environments is closely related to factors such as material composition, manufacturing process, and use environment. The following are some technical data that may affect the performance of marine steel plates in high temperature environments:

Material composition: Steel plates for ships are usually made of low-alloy steel or high-strength steel. These steels contain a certain amount of alloying elements such as chromium, nickel, and molybdenum to improve their corrosion resistance and strength. In a high temperature environment, these alloying elements may undergo reactions such as oxidation and precipitation, which will affect the performance of the material.

Manufacturing process: The manufacturing process of steel plates for ships includes hot rolling, cold drawing, galvanizing, spraying, etc. Among them, hot rolling and cold drawing can improve the mechanical properties and processing properties of steel; galvanizing can improve the corrosion resistance of steel; spraying can increase the surface hardness and wear resistance of steel. In high temperature environments, the selection and control of the manufacturing process has a great influence on the performance of the material.

Use environment: The use environment of steel plates for ships includes seawater, fresh water, oil and other media, as well as harsh weather conditions such as high humidity and strong wind and waves. These environmental factors will affect the surface quality, crack growth, fatigue life and other properties of the material. Therefore, when designing and using steel plates for ships, it is necessary to consider the factors of the use environment.

Mechanical properties: The mechanical properties of steel plates for ships include yield strength, tensile strength, elongation, impact toughness and other indicators. In a high temperature environment, the mechanical properties of materials will change, such as the decrease of yield strength and the increase of tensile strength. Therefore, it is necessary to test and evaluate the mechanical properties of materials to ensure that they meet the design requirements.

Welding performance: Steel plates for ships usually require welding to connect different components. In a high temperature environment, the properties of welding materials will also change, such as weld cracks and deformation. Therefore, welding materials need to be tested and evaluated to ensure that they meet the design requirements.

The following are some common steel plate grades, steel types and parameter tables for ships:

Steel plates for hull structure:

Steel grade	steel type	Yield strength(MPa)	Tensile strength(MPa)	Elongation(%)	Impact toughness(ks)
A63-D63	D63	≥510	≥950	≥20	≥28
A63-E63	E63	≥510	≥950	≥20	≥28
A63-F63	F63	≥510	≥950	≥20	≥28

Steel plate for ship plate:

Steel grade	steel type	yield strength(MPa)	tensile strength(MPa)	extension ratio(%)	impact toughness(ks)
Q345B-DC04	DC04	≥470	≥630	≥20	≥31
Q345B-Z14	Z14	≥470	≥630	≥20	≥31
Q345C-P22	P22	≥470	≥630	≥20	≥31