ASTM A387 GR 91 CLASS 2

ASTM A387 GR 91 CLASS 2

SA387/ASTM A387 GR 91 CLASS 2 Where resistance to high temperature and good anti-corrosion characteristics are required, ASTM A387 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...

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Product Details

SA387/ASTM A387 GR 91 CLASS 2


Where resistance to high temperature and good anti-corrosion characteristics are required, ASTM A387 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, A387 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.


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

Grade 91

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

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


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