offshore plates of S420G1+Q

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Posted On

4-Dec-13

Product Details

blasting or peeled.
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)
C Si Mn P S Cr Ni Mo V Al Nb Ti Cu
Max 0.14 0.15- 0.55 Max 1.65 Max 0.020 Max 0.007 Max 0.25 Max 0.70 Max 0.25 Max 0.080 0.015- 0.055 Max 0.040 Max 0.025 Max 0.30
Note:
a. Cr+Mo+Ni+Cu <0.90%
b. Nb+V<0.09%
c. Nb+V+Ti<0.11%

4.2 Steel making process: EAF+LF/VD
4.3 Mechanical properties
The mechanical properties of S420G1+Q shall meet the requirement as table 2.
Table 2 Mechanical properties
Thickness
mm Mechanical properties
Yield strength MPa Tensile strength MPa Elongation %
8-40 Min 420 480-640 Min 19
41-100 Min 400 480-640 Min 19
101-150 Min 380 480-640 Min 19

4.4 Impact properties
Impact test in the longitudinal and transverse for plates of S420G1+Q shall meet the requirements per table 3.
Table 3 Impact properties
Charpy-V Impact
Test temp.
Celsius degree Longitudinal 1/4 Thickness Longitudinal 1/2 Thickness
Average impact energy Average impact energy
-40C Min 60J -40C Min 60J

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