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)
C | Si | Mn | P | S | Cr | Ni | Mo | Cu | TAL | Nb | V | Ti |
Max 0.18 | Max 0.50 | 0.90- 1.60 | Max 0.035 | Max 0.005 | Max 0.20 | Max 0.40 | Max 0.08 | Max 0.35 | Max 0.020 | Max 0.05 | Max 0.10 | Max 0.02 |
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
Thickness mm | Direction | Yield strength MPa | Tensile strength MPa | Elongation % |
101-150 | Transverse | Min 355 | 470-620 | Min 21 |
151-300 | Transverse | Min 275 | 430-610 | Min 20 |
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
Charpy-V Impact test | ||
Test temp. | Test direction | Average impact energy |
-40 Celsius degree | Longitudinal | Min 70J |
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
No. | Test item | Quantity, Piece | Sampling method | Test menthod |
1 | Chemical composition (Ladle analysis) | 1 (per batch furnace number) | According to DNV-OS-B101 | According to DNV-OS-B101 |
2 | Tensile test | 1 | ||
3 | Charpy-V impact test at -40C | 3 | ||
4 | Grain size | 1 |
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.
