Technical conditions for plates of ABS EQ56-Z35
1. Scope
The technical conditions apply to plates of EQ56-Z35 with thickness not more than 100mm. (8mm-100mm)
2. Dimension, Shape, Weight and Permissible Deviation
The dimension, shape, weight and permissible deviation shall meet the requirements of ABS rules. Thickness tolerance is -0.3mm.
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 | N |
Max 0.20 | Max 0.50 | max 1.70 | Max 0.030 | Max 0.030 | Max 0.02 |
Note: Per batch furnace number product analysis [N]<200ppm.
3.2 Steel making process: EAF+LF/VD
3.3 Tensile properties
The tensile properties of EQ56-Z35 shall meet the requirement as table 2.
Table 2 Tensile properties
Grade | Direction | Yield strength MPa | Tensile strength MPa | Elongation % |
AB/EQ56(Z35) | Transverse | Min 550 | 670-835 | Min 16 |
3.4 Impact properties
Impact test in the longitudinal and transverse for plates of EQ56-Z35 shall meet the requirements per table 3.
Table 3 Impact properties
Sampling place | Test direction | -40C Akv Average impact energy | |
-40C | EN10164 Z % | ||
Transverse | Min 37J | Min 35 | |
3.5 Grain size
Grain size for plates shall be according to ABS rules.
3.6 Surface quality
The surface quality of plates shall be accordance with ABS rules
3.7 Ultrasonic inspection
Plates shall be ultrasonic inspected per ASTM A578/A578M level C.
3.8 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 | Test direction | Test menthod |
1 | Tensile test | 1 (per heat treatment pcs) | Transverse | According to ABS rules |
2 | Impact test | 3 (per heat treatment pcs) | Transverse | |
3 | Gas analysis | 1 (per batch furnace number) | / | |
4 | Thickness-Direction | 3 (per heat treatment pcs) | Thickness |
4. Package, marking and certificate
Package, marking and certificate shall conform to ABS rules
5. The third party inspection
The chemical composition, tensile test and Charpy -V impact test for plates of EQ56 shall be witnessed by surveyor of ABS.
6. Delivery conditions
The delivery conditions for plates of EQ56 shall be Normalized.
7. Other requirements
The other requirements for plates of EQ56 shall be accordance with ABS rules.
MTC accordance with EN10204: 2004 3.2
