Technical conditions for plates of SA533GrBCL2 Used For Nuclear power plant
1. Scope
The technical conditions apply to plates of SA533GrBCL2 Used For Nuclear power plant high pressure heater with thickness range 8mm-120mm.
2. Adopt standard:
ASME SA533 / SA533M - 09e1 Standard Specification for Pressure Vessel Plates, Alloy Steel, Quenched and Tempered, Manganese-Molybdenum and Manganese-Molybdenum-Nicke
ASME SA20/SA20M Standard Specification for General Requirements for Steel Plates for Pressure Vessels
ASME SA370 Standard Test Methods and Definitions for Mechanical Testing of Steel Products
3. Dimension, Shape, Weight and Permissible Deviation
The dimension, shape, weight and permissible deviation shall meet the requirements of ASME SA20/SA20M.
4. Technical conditions
4.1 Chemical composition
The chemical composition of plates shall be accordance with the following table 1.
Table 1 Chemical composition
Type | C | Si | Mn | P | S | Mo | Ni |
Ladle analysis | Max 0.20 | 0.10- 0.30 | 1.15- 1.60 | Max 0.012 | Max 0.012 | 0.45- 0.55 | 0.50- 0.80 |
Product analysis | Max 0.20 | 0.10- 0.30 | 1.15- 1.60 | Max 0.012 | Max 0.012 | 0.45- 0.55 | 0.50- 0.80 |
Type | Cu | Cr | V | Nb | Ti | Al | Cu+6Sn |
Ladle analysis | Max 0.20 | Max 0.20 | Max 0.01 | Max 0.02 | Max 0.03 | 0.020- 0.040 | Max 0.33 |
Product analysis | Max 0.20 | Max 0.20 | Max 0.01 | Max 0.03 | Max 0.03 | 0.020- 0.040 | Max 0.33 |
4.2 Steel making process: EAF+LF/VD
4.3 Tensile properties
The SWHT properties of SA533GrBCL2 shall meet the requirement as table 2&3.
Table 2 Tensile properties
Test Temp. | Yield strength MPa | Tensile strength MPa | Elongation % |
Room temp. | Min 485 | 620-795 | Min 20 |
4.4 High temperature tensile properties: 261℃, Rp0.2 Min 416MPa.
4.5 Impact properties
Impact test in the longitudinal and transverse for plates of SA533GrBCL2 shall meet the requirements per table 3.
Table 3 Impact properties
Transverse test | |
Test temp. | Average impact energy |
40℃ | Actual measured value |
20℃ | Min 103J, single value min 72J |
0℃ | Min 56J, single value min 40J |
-20℃ | Min 40J, single value min 28J |
-40℃ | Actual measured value |
-60℃ | Actual measured value |
4.6 SWHT rules:
SWHT Temperature | operation |
Under 425℃ | Charging |
More then 425℃ | Heating rate: Max 56℃/h |
610+/-5℃ | Holding 3.6min/mm |
More then 425℃ | Cooling rate: Max 56℃/h |
Under 425℃ | Air cooling to room temperature |
4.7 Surface quality
The surface quality of plates shall be accordance with ASTM A20/A20M.
4.8 For T>=25 mm through thickness tension testing shall be done according to SA770(%Re>=35)
4.9 Ultrasonic inspection
Plates shall be ultrasonic inspected per ASTM A578/A578M level A.
4.10 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
Test item | Quantity, Piece | Sampling method | Test method | Sampling conditions |
Ladle analysis | 1 (per furnace) | SA20/SA20M | ASTM A751 | / |
Product analysis | 1 (per rolled pc) | SA20/SA20M | ASTM A751 | |
Tensile test | 1 (per rolled pc) | SA20/SA20M | ASTM A370 | SWHT |
Charpy-V impact test at 0C | 39 (per rolled pc) | SA20/SA20M | ASTM A370 | |
High temp tensile test | 2 (per rolled pc) | SA20/SA20M | E21 | |
Ultrasonic test | Each product pc | ASTM A578/A578M | ||
Through-thickness tensile test | 4 (per rolled pc) | SA20/SA20M | ASTM A770 | |
5. Package, marking and certificate
Package, marking and certificate shall conform to SA20/SA20M.
6. The third party inspection
The chemical composition, tensile test and Charpy -V impact test for plates of SA533GrBCL2 shall be witnessed by surveyor of clients.
7. Delivery conditions
The delivery conditions for plates of SA533GrBCL2 shall be Quenched+ Tempered.
8. Other requirements
The other requirements for plates of SA533GrBCL2 shall be accordance with SA533/SA533M.
MTC accordance with EN10204: 2004 3.1
Index Terms
alloy steel; alloy steel plate; pressure containing parts; pressure vessel steels; steel plates; steel plates for pressure vessels; Alloy steel plate--specifications; High-temperature service applications--steel plate/sheet; Manganese alloy steel plate--specifications; Manganese-molybdenum-nickel alloy--specifications; Quenched and tempered steels (specifications);
