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.
Asteiron supplies SA387 to clients and fabricators worldwide from our substantial stockholding.
Please refer to technical specifications below for ASME SA387 Grade 11 Class 2...
Equivalents:
BS
EN
ASTM/ASME
DIN
621 B
...
SA387-11-2
...
Specifications:
Chromium & Molybdenum content (according to the ASTM specification):
Designation
Nominal Chromium Content (%)
Nominal Molybdenum Content (%)
SA387 Grade 11
1.25%
0.50%
Tensile Requirements for Class 2 Plates:
Designation:
Requirement:
Grade22
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:
Element
Chemical Composition (%) inc. Grade & UNS No.
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
Tension Test Requirements:
Material shall be tested using a test specimen will confirm to the tensile requirements as outlined in Table 2.
Other requirements:
The following requirements and testing procedures (which are not mandatory) are considered suitable for Chrome Molybdenum steel:
Vacuum treatment
Product Analysis
Additional Tension Test
Charpy V-Notch Impact Test
Drop Weight Test
High Temperature Tension Test
Ultrasonic Examination
Magnetic Particle Examination
To find out more about Asteiron's services and ASME SA387 Grade 11 Class 2 steel plates, contact us.
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