Technical conditions for plates of SA387Gr21CL2

Gloria Steel Limited

  • Technical conditions for plates of SA387Gr21CL20
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13年12月4日
钢
US $3,000.00 / 公吨
10.00 公吨
L/C, T/T
China
Standard seaworthy export packing or as your requirement.
30 天

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Technical conditions for plates of SA387Gr21CL2

1. Scope
The technical conditions apply to plates of SA387Gr21CL2 with thickness range 10mm-120mm.
2. Adopt standard:
ASME SA387/SA387M Specification for pressure vessel plates, alloy steel, Chromium-Molybdenum
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.
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
Ladle analysis 0.05- 0.15 Max 0.50 0.30- 0.60 Max 0.030 Max 0.020 Max 0.25 2.75- 3.25 0.90- 1.10 Max 0.03 Max 0.02
Product analysis 0.04- 0.15 Max 0.50 0.35- 0.63 Max 0.030 Max 0.020 Max 0.27 2.63- 3.37 0.85- 1.15 Max 0.04 Max 0.02

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 SA387Gr21CL2 shall meet the requirement as table 2&3.
Table 2 Tensile properties
Yield strength MPa Tensile strength MPa Elongation % Bend test
D=3a
Min 310 515-690 Min 18 180C un-cracked

4.4 Impact properties
Impact test in the longitudinal and transverse for plates of SA387Gr21CL2 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

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2013年10月23日
China
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