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SA387 Gr 11 Class 2 Plates

SA387 Gr 11 Class 2 Plates

The oil, gas, and petrochemical sectors, where liquids and gases are frequently held at higher temperatures, employ this steel extensively as a pressure vessel grade for use in elevated temperature operation.
In addition to providing superior corrosion and oxidation resistance, the increased chromium levels are a must for sour gas applications. Please see our ASME SA387 Grade 11 Class 2 technical standards listed below.

SA387 Gr 11 Class 2 Plates Specifications

Designation Nominal Chromium Content (%) Nominal Molybdenum Content (%)
SA387 Grade 11
1.25%
0.50%

Equivalents for SA387 Gr 11 Class 2 Plates

BS EN ASTM/ASME DIN
621 B
– – –
SA387-11-2
– – –

Tensile Requirements for ASME SA387 Grade 11 Alloy Steel Plates Class 2 Plates

Designation:Requirement:Grade 11
SA387 Grade 11Tensile strength, ksi [MPa]75 to 100 [515 to 690]
 Yield strength, min, ksi [MPa]/(0.2% offset)43 [310]
 Elongation in 8 in. [200mm], min %18
 Elongation in 2 in. [50mm], min, %22
 Reduction of area, min %–––

Chemical Requirements for ASME SA387 Grade 11 Alloy Steel Plates

Element Chemical Composition (%)
  SA387 Grade 11
Carbon:Heat Analysis:0.05 – 0.17
 Product Analysis:0.04 – 0.17
Manganese:Heat Analysis:0.40 – 0.65
 Product Analysis:0.35 – 0.73
Phosphorus:Heat Analysis:0.035
 Product Analysis:0.035
Sulphur (max):Heat Analysis:0.035
 Product Analysis:0.035
Silicon:Heat Analysis:0.50 – 0.80
 Product Analysis:0.44 – 0.86
Chromium:Heat Analysis:1.00 – 1.50
 Product Analysis:0.94 – 1.56
Molybdenum:Heat Analysis:0.45 – 0.65
 Product Analysis:0.45 – 0.70

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