Technical conditions for plates of ESR NV E36-Z35

1.       Scope

The technical conditions apply to plates of E36-Z35 with thickness not less than 101mm. (101mm-300mm)

2.       Dimension, Shape, Weight and Permissible Deviation

The dimension, shape, weight and permissible deviation shall meet the requirements of DNV-OS-B101.

The flatness of plates shall be =< 5mm/1m and =<8mm/2m.

3.       Technical conditions

3.1   Chemical composition (Ladle analysis)

The chemical composition of plates shall be accordance with the following table 1.

Table 1 Chemical composition (Ladle analysis)

3.2   Carbon equivalent (CEq)

Carbon equivalent shall be not more than 0.43 for plates of E36-Z35 thickness 101-150mm;

Carbon equivalent shall be not more than 0.45 for plates of E36-Z35 thickness 151-300mm;

Carbon equivalent shall be calculated as follows:

CE=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15 (%)

3.3   Steel making process: EAF+LF/VD+ESR

3.4   Tensile properties

The tensile properties of E36-Z35 shall meet the requirement as table 2.

Table 2 Tensile properties

3.5   Impact properties

Impact test in the longitudinal and transverse for plates of E36-Z35 shall meet the requirements per table 3.

Table 3 Impact properties

3.6   Grain size

Grain size for plates shall be according to DNV-OS-B101.

3.7   Surface quality

The surface quality of plates shall be accordance with DNV-OS-B101

3.8   Ultrasonic inspection

Thickness less than 200mm, plates shall be ultrasonic inspected per EN10160 S3E3.

Thickness more than 200mm, plates shall be ultrasonic inspected per ASTM A578/A578M level C

3.9   Direction of Thickness

Through thickness tension testing shall be done according to EN10164 (%Re ≥ 35)

3.10    Test method and inspection rules

Test items, sampling quantity, sampling method and test method shall conform to table 4.

Table 4 Test items for plates

4.       Package, marking and certificate

Package, marking and certificate shall conform to DNV-OS-B101.

5.       The third party inspection

The chemical composition, tensile test and Charpy -V impact test for plates of E36-Z35 shall be witnessed by surveyor of DNV.

6.       Delivery conditions

The delivery conditions for plates of E36-Z35 shall be Normalized.

7.       Other requirements

The other requirements for plates of E36-Z35 shall be accordance with DNV-OS-B101.