SA387 Grade 91 Class 2

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.
Masteel can supply SA387 Grade 91 steel plate from stock to global destinations with mill certification and stampings.

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

DesignationNominal Chromium Content (%)Nominal Molybdenum Content (%)
A387 Grade 919.00%1.00%

Tensile Requirements for Class 2 Plates

DesignationRequirementGrade 91
A387 Grade 91Tensile 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 Composition of ASME SA387 Grade 91 Class 2

  
Carbon (C)%
Heat Analysis:
Product Analysis:
0.08 - 0.12
0.06 - 0.15
Manganese (Mn)%
Heat Analysis:
Product Analysis:
0.30 - 0.60
0.25 - 0.66
Phosphorus (P)%
Heat Analysis:
Product Analysis:
0.020
0.025
Sulphur (S) (Max)%
Heat Analysis:
Product Analysis:
0.010
0.012
Silicon (Si)%
Heat Analysis:
Product Analysis:
0.20 - 0.50
0.18 - 0.56
Chromium (Cr)%
Heat Analysis:
Product Analysis:
8.00 - 9.50
7.90 - 9.60
Molybdenum (Mo)%
Heat Analysis:
Product Analysis:
0.85 - 1.05
0.80 - 1.10
Nickel (Ni)%
Heat Analysis:
Product Analysis:
0.40
0.43
Vanadium (Vn)%
Heat Analysis:
Product Analysis:
0.18 - 0.25
0.16 - 0.27
Columbium (Nb)%
Heat Analysis:
Product Analysis:
0.06 - 0.10
0.05 - 0.11
Nitrogen (N)%
Heat Analysis:
Product Analysis:
0.030 - 0.070
0.025 - 0.080
Aluminium (Al)%
Heat Analysis:
Product Analysis:
0.02
0.02
Titanium (Ti)%
Heat Analysis:
Product Analysis:
0.01
0.01
Zirconium (Zr)%
Heat Analysis:
Product Analysis:
0.01
0.01