Steel Plate SA302GrC
Category: Pressure Vessel and Boiler Steel PlateModel:
The technical conditions apply to plates of SA302GrC with thickness not more than 200mm. (8mm-200mm)
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Scope
The technical conditions apply to plates of SA302GrC with thickness not more than 200mm. (8mm-200mm)
Adopt standard:
ASME SA302/SA302M Standard Specification covers manganese, molybdenum and nickel alloy steel plates intended particularly for welded boilers and other pressure vessels. ASME SA20/SA20M Standard Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling
ASME SA370 Standard Test Methods and Definitions for Mechanical Testing of Steel Products
Dimension, Shape, Weight and Permissible Deviation
The dimension, shape, weight and permissible deviation shall meet the requirements of ASME SA20/SA20M.
Thickness tolerance: +/-1.52mm
Flatness: 4mm/m
Surface shot blasting or peeled.
Technical conditions
Chemical composition (Ladle analysis)
The chemical composition of plates shall be accordance with the following table 1.
Table 1 Chemical composition (Ladle analysis)
Note: Ni+Cr+Mo+Cu+V+Nb≤0.80%.
Steel making process: EAF+LF/VD
Carbon equivalent (CEq)
Carbon equivalent shall be not more than 0.56 for plates of SA302GRC.
Carbon equivalent shall be calculated as follows:
CEq=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15 (%)
Mechanical properties
The mechanical properties of SA302GrC shall meet the requirement as table 2.
Table 2 Mechanical properties
Impact properties
Impact test in the longitudinal and transverse for plates of SA302GrC shall meet the requirements per table 3.
Table 3 Impact properties
Grain size
Grain size for plates shall be according to SA302GrC.
Surface quality
The surface quality of plates shall be in accordance with ASME SA20/SA20M.
Ultrasonic inspection
Plates shall be 100% ultrasonic inspected as per JB/T4730.3-2005 Level I.
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
Package, marking and certificate
Package, marking and certificate shall conform to ASME SA20/SA20M.
The third party inspection
The chemical composition, tensile test and Charpy -V impact test for plates of SA302GrC shall be witnessed.
Delivery conditions
The delivery conditions for plates of SA302GrC shall be N+T.
Other requirements:
The other requirements for plates of SA302GrC shall be in accordance with SA203.
MTC in accordance with EN10204: 2004 3.1
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 |
Nb |
V |
Al |
Max 0.23 |
0.13- |
1.07- |
Max 0.020 |
Max 0.010 |
|
0.37- |
0.41- |
|
Max 0.05 |
Min |
Note: Ni+Cr+Mo+Cu+V+Nb≤0.80%.
Steel making process: EAF+LF/VD
Carbon equivalent (CEq)
Carbon equivalent shall be not more than 0.56 for plates of SA302GRC.
Carbon equivalent shall be calculated as follows:
CEq=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15 (%)
Mechanical properties
The mechanical properties of SA302GrC shall meet the requirement as table 2.
Table 2 Mechanical properties
Size mm |
Mechanical properties |
Lateral expansion mm |
Hardness test |
|||
Yield strength MPa |
Tensile strength MPa |
Section shrinkage ratio % |
Elongation % |
|||
T≤120 |
Min 345 |
550-690 |
Min 35 |
Min 20 |
Min |
Max 240HV |
Impact properties
Impact test in the longitudinal and transverse for plates of SA302GrC shall meet the requirements per table 3.
Table 3 Impact properties
Charpy-V Impact Test temp. Celsius degree |
Transverse 1/4 Thickness |
Longitudinal 1/4 Thickness |
||
|
Average impact energy |
|
Average impact energy |
|
-7.6 ℃ |
Min 41 J |
|
Min |
Grain size
Grain size for plates shall be according to SA302GrC.
Surface quality
The surface quality of plates shall be in accordance with ASME SA20/SA20M.
Ultrasonic inspection
Plates shall be 100% ultrasonic inspected as per JB/T4730.3-2005 Level I.
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 |
Direction |
Test method |
1 |
Heat analysis |
1 per plate |
1/4 T |
ASME SA370 |
2 |
Tensile test at Ambient Tem |
1 (per heat treatment pc) |
Transverse/ |
ASME SA370 |
3 |
Tensile test at Ambient Tem |
1 (per heat treatment pc) |
Longitudinal |
ASME SA370 |
4 |
Bend Test at Ambient Tem |
1 per plate |
1/2 T |
ASME SA20 |
5 |
Charpy-V impact |
3 (per heat treatment pc) |
/ |
ASME SA370 |
6 |
Non metallic inclusion |
1 per plate |
/ |
ASME SA370 |

Honor
- Delivery time..
Answer:Delivery time.. - Payment..
Answer:Payment.. - Product size..
Answer:Product size.. - Material test certificate..
Answer:Material test certificate.. - Trade item..
Answer:Trade item..