Shipbuilding steels are steels specially developed and approved by the China Classification Society (CCS) for shipbuilding.

shipbuilding steels typically include various grades of structural steel with special mechanical properties such as high strength and excellent weldability to meet the demanding requirements of shipbuilding. These steels are used to make various ship components, including hulls, decks and superstructures.

Specific grades of CCS shipbuilding steels may vary depending on the requirements for the vessel being built. Some commonly used CCS grades include CCS A, CCS B, CCS D, CCS E and others. These grades are usually followed by a number indicating the yield strength of the steel, such as CCS A550 or CCS B620.

 

 

CCS A	CCS B	CCS D	CCS E
CCS AH32	CCS DH32	CCS EH32	CCS EH32
CCS AH36	CCS DH36	CCS EH36	CCS FH36
CCS AH40	CCS DH40	CCS EH40	CCS FH40
CCS AQ47	CCS DQ47	CCS EQ47	CCS FQ47
CCS AQ51	CCS DQ51	CCS EQ51	CCS FQ51
CCS AQ56	CCS DQ56	CCS EQ56	CCS FQ56
CCS AQ63	CCS DQ63	CCS EQ63	CCS FQ63
ABS AQ70	CCS DQ70	CCS EQ70	CCS FQ70

 

 

UT (Ultrasonic testing)

AR (hot rolled only)

TMCP (thermomechanical control treatment)

N (normalized)

Q+T (quenching and tempering)

Test in Z direction (Z15, Z25, Z35)

Charpy V-Notch impact test

testing (such as SGS)

Coating or shot blasting and painting

 

 

GNEE can provide the following shipbuilding steel CCS measurement services:

1. Dimensional Measurement: Measuring dimensional parameters such as length, width and thickness using measuring instruments to ensure that the steel sheet is qualified and meets the design requirements.

2. Surface measurement: Measuring parameters such as flatness, unevenness and surface roughness of the steel sheet to ensure that the quality and surface condition of the steel sheet meet the requirements.

3. Thickness Measurement: Use a thickness gauge to accurately measure the thickness of the steel sheet and ensure it meets the design requirements.

4. Material measurement: Use material analysis instruments to measure the chemical composition and mechanical properties of the steel sheet to ensure that the quality and performance of the steel sheet meet the requirements.

5. Bending and deformation measurements: During the shipbuilding process, steel sheets may be subject to bending and deformation. The degree of bending and deformation of a steel sheet is measured and monitored using tools such as bending and displacement gauges to ensure that it is within acceptable limits.

 

 

 

 

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