Since API shipbuilding steel (American Petroleum Institute) is not a steel standardization organization, it does not have special grades and specifications for shipbuilding steel. However, in the field of marine engineering and offshore structures, some common API standard steel grades and specifications may be suitable for shipbuilding applications.
The following are some common API shipbuilding steel and specifications:
1. API 2H-Grade 50: This is a high-strength, low-alloy structural steel commonly used in marine platforms and offshore structures. Its specific chemical composition and mechanical properties comply with API 2H standard requirements.
2. API 2W-Grade 50/60/70: This is a series of high-strength, low-alloy structural steels commonly used in marine and offshore structures. They have good impact toughness and corrosion resistance and meet the requirements of API 2W standards.
Each API shipbuilding steel grade has a specific chemical composition range and mechanical property requirements to ensure its suitability for specific engineering applications. Specific steel specifications also depend on project needs and design requirements.
If you need to use specific API shipbuilding steel grades and specifications, it is recommended to refer to the relevant API standard documents and consult with professional engineers or suppliers to ensure that the steel you choose meets the specific requirements.