Technical conditions for plates of SA299GrA

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Posted On

4-Dec-13

Product Details

l Products
3. Dimension, Shape, Weight and Permissible Deviation
The dimension, shape, weight and permissible deviation shall meet the requirements of ASME SA20/SA20M.
The thickness toleration: -0 mm/+3.5mm
4. Technical conditions
4.1 Chemical composition (Ladle analysis)
The chemical composition of plates shall be accordance with the following table 1.
Table 1 Chemical composition (Ladle analysis)
Thickness
mm C Si Mn P S Ni Mo V Cr
Ladle analysis Max 0.28 0.15- 0.40 0.90- 0.50 Max 0.020 Max 0.010 Max 0.25 Max 0.12 Max 0.03 Max 0.25
Product analysis Max 0.28 0.13- 0.45 0.84- 1.62 Max 0.025 Max 0.015 Max 0.25 Max 0.12 Max 0.03 Max 0.25
Note: Cu+Ni+Cr+Mo+V =< 0.70%

4.2 Steel making process: EAF+LF/VD
4.3 Mechanical properties
The SWHT mechanical properties of SA299GrA shall meet the requirement as table 2&3&4.
Table 2 Tensile properties
Thickness mm Yield strength MPa Tensile strength MPa Elongation % Bend test
D=4a
25-200 Min 275 515-655 Min 19 180C un-cracked

4.4 Impact properties
Impact test in the longitudinal and transverse for plates of SA299GrA shall meet the requirements per table 3.
Table 3 Impact properties
Charpy-V Impact
Test temp.
Celsius degree Transverse
Average impact energy
0 C Min 27J

4.5 Minimum values for the proof strength Rp0.2 at elevated temperatures shall meet the requirements per table 4.
Table 4 Tensile properties
Test TEMP Thickness mm 200C 250C 300C 350C 375C 400C
Rp0.2
Min (MPa) >25-200 237 227 216 202 196 191

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