Difference between ABS B and CCS B steel plate

ABS B and CCS B are both normal-strength steel plates specifically designed for shipbuilding and marine engineering applications. They are certified by two different classification societies-ABS (American Bureau of Shipping) and CCS (China Classification Society)-but are technically equivalent in terms of mechanical properties and chemical composition.

ABS Grade B is certified by the American Bureau of Shipping and is defined as an ordinary-strength structural steel used almost exclusively in the shipbuilding industry . It has a specified minimum yield strength of 235 MPa and a tensile strength range of 400-520 MPa . The impact test is conducted at 0°C, with minimum energy requirements of 27J for transverse specimens . Typical applications include hull construction, marine equipment, barges, and general ship structural components.

CCS Grade B is certified by the China Classification Society and serves as the direct equivalent to ABS B in the Chinese classification system . It shares identical mechanical property requirements: minimum yield strength of 235 MPa, tensile strength of 400-520 MPa, and minimum elongation of 22% . The chemical composition is also comparable, with maximum carbon content of 0.21% and manganese content of at least 0.80% . Like its ABS counterpart, CCS B requires impact testing at 0°C with a minimum of 27J.

Key Differences:
The primary distinction between these two grades lies in their certifying authority and the corresponding quality control system . ABS B complies with American Bureau of Shipping rules and is recognized internationally, particularly in projects requiring ABS certification . CCS B complies with China Classification Society rules and is typically specified for vessels built in Chinese shipyards or for projects under Chinese classification.

Chemical Composition

Mechanical Property

CCS GRADE B high strength property