Technical conditions for plates of SA387Gr22CL2 us

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Posted On

4-Dec-13

Product Details

r 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.
The thickness toleration: -0/+2.5mm
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
Grade Type C Si Mn P S Mo
SA387Gr22CL2 Ladle analysis 0.05- 0.15 Max 0.50 0.30- 0.60 Max 0.025 Max 0.010 0.87- 1.13
Product analysis 0.05- 0.15 Max 0.50 0.30- 0.60 Max 0.025 Max 0.015 0.87- 1.13

4.2 Steel making process: EAF+LF/VD
4.3 Mechanical properties
The mechanical properties of SA387Gr22CL2 shall meet the requirement as table 2&3.
Table 2 Tensile properties
Thickness mm Yield strength MPa Tensile strength MPa Elongation % High temp. 350C tensile test
8-120 Min 310 515-690 Min 18 Rp0.2>=185MPa

4.4 Impact properties
Impact test in the longitudinal and transverse for plates of SA387Gr22CL2 shall meet the requirements per table 3.
Table 3 Impact properties
Grade Sampling size Room temp. Transverse Akv(J)
SA387Gr22CL2 10x10x55 Min 45
7.5x10x55 Min 39
5x10x55 Min 30

4.5 SWHT: Simulated Post-Weld Heat Treatment of Mechanical Test Coupons shall be prepared in 600+/-10 C with min.5 minute per each mm of thickness.
4.6 Surface quality
The surface quality of plates shall be accordance with ASTM A20/A20M.

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