Chromium Molybdenum Steel - A387 Grade 11 Class 2

Chromium Molybdenum Steel - A387 Grade 11 Class 2

A pressure vessel grade steel for use in elevated temperature service, ASTM A387 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...

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A pressure vessel grade steel for use in elevated temperature service, ASTM A387 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.


The higher levels of chromium also provide excellent corrosion and oxidation resistance.


Please refer to our technical specifications below for ASTM A387 Grade 11 Class 2.


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

Designation

Nominal Chromium Content (%)

Nominal Molybdenum Content (%)

A387 Grade 11

1.25%

0.50%

 

Tensile Requirements

Designation

Requirement

Grade 11

A387 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: 

Carbon (C)

%

Heat Analysis:
Product Analysis:

0.05 - 0.17
0.04 - 0.17

Manganese (Mn)

%

Heat Analysis:
Product Analysis:

0.40 - 0.65
0.35 - 0.73

Phosphorus (P)

%

Heat Analysis:
Product Analysis:

0.035
0.035

Sulphur (S) (Max)

%

Heat Analysis:
Product Analysis:

0.035
0.035

Silicon (Si)

%

Heat Analysis:
Product Analysis:

0.50 - 0.80
0.44 - 0.86

Chromium (Cr)

%

Heat Analysis:
Product Analysis:

1.00 - 1.50
0.94 - 1.56

Molybdenum (Mo)

%

Heat Analysis:
Product Analysis:

0.45 - 0.65
0.45 - 0.70

(Maximum values unless stated otherwise)

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