Where resistance to high temperature and good anti-corrosion characteristics are required, ASME SA387 Grade 91 Class 2 carbon alloy steel plate is a material to consider. It is a pressure vessel grade steel which is used commonly by fabricators who supply the oil and gas industry.
Due to the materials excellent corrosion resistant properties, SA387 Grade 91 is also an option for use in sour service environments. The material has good weldability and with its heat resistant qualities, the material is a highly versatile steel which can be used in numerous applications.
Asteiron can supply SA387 Grade 91 steel plate from stock to destinations with mill certification and stampings.
Equivalents:
BS
EN
ASTM/ASME
DIN
...
...
A387-91-2
...
Specifications:
Chromium & Molybdenum content (according to the ASTM specification):
Designation
Nominal Chromium Content (%)
Nominal Molybdenum Content (%)
A387 Grade 91
9.00%
1.00%
Tensile Requirements for Class 2 Plates:
Designation:
Requirement:
Grade91
SA387 Grade 91
Tensile strength, ksi [MPA]
85 to 110 [585 to 760]
Yield strength, min, ksi [MPa]/(0.2% offset)
60 [415]
Elongation in 8 in. [200mm], min %
...
Elongation in 2 in. [50mm], min, %
18
Reduction of area, min %
...
Chemical Requirements:
Element
Chemical Composition (%) inc. Grade & UNS No.
SA387 Grade 91
Carbon:
Heat Analysis:
0.08 - 0.12
Product Analysis:
0.06 - 0.15
Manganese:
Heat Analysis:
0.30 - 0.60
Product Analysis:
0.25 - 0.66
Phosphorus:
Heat Analysis:
0.020
Product Analysis:
0.025
Sulphur (max):
Heat Analysis:
0.010
Product Analysis:
0.012
Silicon:
Heat Analysis:
0.20 - 0.50
Product Analysis:
0.18 - 0.56
Chromium:
Heat Analysis:
8.00 - 9.50
Product Analysis:
7.90 - 9.60
Molybdenum:
Heat Analysis:
0.85 - 1.05
Product Analysis:
0.80 - 1.10
Nickel, max:
Heat Analysis:
0.40
Product Analysis:
0.43
Vanadium:
Heat Analysis:
0.18 - 0.25
Product Analysis:
0.16 - 0.27
Columbium:
Heat Analysis:
0.06 - 0.10
Product Analysis:
0.05 - 0.11
Nitrogen:
Heat Analysis:
0.030 - 0.070
Product Analysis:
0.025 - 0.080
Aluminium:
Heat Analysis:
0.02
Product Analysis:
0.02
Titanium:
Heat Analysis:
0.01
Product Analysis:
0.01
Zirconium:
Heat Analysis:
0.01
Product Analysis:
0.01
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 and the supply of ASME SA387 Grade 12 Class 2 steel alloy plates, contact us.
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