Equivalent Materials for DNV EH36 (NV E36) Marine Steel

1. Equivalence Table of Grades Among Major Classification Societies

The following are the grades from various classification societies that are fully equivalent to DNV EH36 (or NV E36) in terms of chemical composition, mechanical properties, and impact requirements at -40°C:

Key Point: All of the above grades comply with the same unified technical requirements of the International Association of Classification Societies (IACS). The material’s yield strength (≥355 MPa), tensile strength (490–620 MPa), and low-temperature impact toughness at -40°C are identical; the only difference lies in the certifying classification society.

2. Relationship with Common Ship Plate Grades

DNV EH36 belongs to the E-series of high-strength ship plates. A comparison with AH36 and DH36 in the same series is as follows:

All three grades share the same strength rating; the key difference lies in the progressively higher requirements for low-temperature impact toughness. EH36 is primarily suitable for vessels operating in cold waters, ice-class vessels, LNG carriers, large container ships, and offshore engineering structures.

3. Key Mechanical Properties of DNV EH36 (Typical Values)

4. Precautions for Engineering Applications

Although grades certified by different classification societies are equivalent at the material level, they should not be simply regarded as completely interchangeable in actual shipbuilding projects. When selecting or substituting materials, the following points must be verified:

1) Whether the classification society certification is accepted by the project (e.g., DNV projects typically require a certificate issued by DNV);

2) Whether the Material Test Certificate (MTC) corresponds to the target classification society;

3) Whether the steel plate thickness range meets design requirements;

4) Whether the impact test temperature and absorbed energy meet the specified values;

5) Whether the Welding Procedure Qualification (WPS/PQR) is applicable to the substitute grade.