ASME SA387 Grade 11 Class 2

As a pressure vessel grade steel for use in elevated temperature service, ASME SA387 Grade 11 Class 2 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.
Masteel supplies SA387 to clients and fabricators worldwide from our substantial stockholding here in the UK.
Please refer to our technical specifications below for ASME SA387 Grade 11 Class 2.

Chromium & Molybdenum content (according to the ASME specification):

DesignationNominal Chromium Content (%)Nominal Molybdenum Content (%)
A387 Grade 111.25%0.50%

Tensile Requirements for Class 2 Plates

DesignationRequirementGrade 11
A387 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 Composition of SA387 Grade 11 Class 2

  
Carbon (C)%
Heat Analysis:
Product Analysis:
0.05 - 0.17
0.04 - 0.17
Manganese (Mn)%
Heat Analysis:
Product Analysis:
0.40 - 0.65
0.35 - 0.73
Phosphorus (P)%
Heat Analysis:
Product Analysis:
0.035
0.035
Sulphur (S) (Max)%
Heat Analysis:
Product Analysis:
0.035
0.035
Silicon (Si)%
Heat Analysis:
Product Analysis:
0.50 - 0.80
0.44 - 0.86
Chromium (Cr)%
Heat Analysis:
Product Analysis:
1.00 - 1.50
0.94 - 1.56
Molybdenum (Mo)%
Heat Analysis:
Product Analysis:
0.45 - 0.65
0.45 - 0.70