High quality A387 Grade 91 Class 2 – manufactured at some of the world's finest steel mills, this chrome–molybdenum alloy has excellent resistance to high working temperatures making it ideal for use in the oil, gas, chemical and power generation industry applications. We supply to fabricators who serve these industries on a global basis.
Our plates can be supplied from our own stockholding or directly from the mill – all plates come with mill test certification and individual stampings. Third party testing can be arranged at the customers request.
Equivalents:
BS
EN
ASTM/ASME
DIN
...
...
A387-91-2
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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
A387 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.
Grade 91 (UNS: S50200)
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's services and ASTM A387 Grade 12 Class 2 steel plates which we can supply directly to you from stock or from the mill,contact us.
Click on one of the links above to view technical information on particular grades.
For more information about ASTM A387 chrome moly plates or to receive a detailed and competitive quotation, please contact us.
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