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ASME SA 387 GRADE 11 Class 2
ASME SA 387 GRADE 11 Class 2

ASME SA 387 GRADE 11 Class 2 steel

As a pressure vessel grade steel for use in elevated temperature service, is used in a variety of industries and is highly effective, particularly in the oil, gas and petrochemical industry, where liquids and gases are often stored at higher temperatures. 
Product introduction
As a pressure vessel grade steel for use in elevated temperature service, is used in a variety of industries and is highly effective, particularly in the oil, gas and petrochemical industry, where liquids and gases are often stored at higher temperatures. 
The higher levels of chromium also provide excellent corrosion and oxidation resistance, which is a must in sour gas applications. Please refer to our technical specifications below for ASME SA387 Grade 11 Class 2. 
Technical Data
Equivalents
BS EN ASTM/ASME DIN
621 B ––– SA387-11-2 –––

Specifications for ASME SA387 Grade 11 Alloy Steel Plates
Chromium & Molybdenum content (according to the ASME specification)
Designation Nominal Chromium
Content (%)
Nominal Molybdenum
Content (%)
SA387 Grade 11 1.25% 0.50%

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