Technical conditions for plates of SA387Gr91CL2

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Posted On

4-Dec-13

Product Details

ible Deviation
The dimension, shape, weight and permissible deviation shall meet the requirements of ASME SA20/SA20M.
The thickness toleration: -0.25mm/+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 Cu Cr Mo V NB Ni Ti
Ladle analysis 0.08- 0.12 o.20- 0.50 0.30- 0.60 Max 0.020 Max 0.010 Max 0.25 8.00- 9.50 0.85- 1.05 Max 0.04 Max 0.02 Max 0.40 Max 0.01
Product analysis 0.06- 0.15 0.18- 0.56 0.35- 0.66 Max 0.025 Max 0.012 Max 0.27 7.90- 9.60 0.80- 1.10 Max 0.05 Max 0.02 Max 0.43 Max 0.01

Note: Ladle analysis sampling per furnace and product analysis per each PC finished product.

4.2 Steel making process: EAF+LF/VD
4.3 Mechanical properties
The mechanical properties of SA387Gr91CL2 shall meet the requirement as table 2&3.
Table 2 Tensile properties
Yield strength MPa Tensile strength MPa Elongation % Bend test
D=3a
Min 415 585-760 Min 18 180C un-cracked

4.4 Impact properties
Impact test in the longitudinal and transverse for plates of SA387Gr91CL2 shall meet the requirements per table 3.
Table 3 Impact properties
Charpy-V Impact test
Test temp.
Celsius degree Transverse
Average impact energy
+20C Min 31J

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.

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