ASTM A387 GR 9 CLASS 2 ASME SA387

ASTM A387 GR 9 CLASS 2 ASME SA387

Weldable carbon steel plates for pressure vessels and boilers used in elevated temperatures. The material benefits from added chromium and molybdenum which gives the steel greater corrosion resistance and resistance to heat. SA387 Grade 9 is used by fabricators who serve the oil, gas and...

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Product Details

Weldable carbon steel plates for pressure vessels and boilers used in elevated temperatures. The material benefits from added chromium and molybdenum which gives the steel greater corrosion resistance and resistance to heat. SA387 Grade 9 is used by fabricators who serve the oil, gas and petrochemical industry.


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

Designation

Nominal Chromium Content (%)

Nominal Molybdenum Content (%)

A387 Grade 5

9.00%

1.00%

 

Tensile Requirements for Class 2 Plates:

Designation

Requirement

Grade 9

A387 Grade 9

Tensile strength, ksi [MPA]

75 to 100 [515 to 690]


Yield strength, min, ksi [MPa]/(0.2% offset)

45 [310]


Elongation in 8 in. [200mm], min %



Elongation in 2 in. [50mm], min, %

18


Reduction of area, min %

45 (measured on round specimen)
40 (measured on flat specimen)

 

Chemical Requirements:

Carbon (C)

%

Heat Analysis:
Product Analysis:

0.15 max
0.15 max

Manganese (Mn)

%

Heat Analysis:
Product Analysis:

0.30 - 0.60
0.25 - 0.66

Phosphorus (P)

%

Heat Analysis:
Product Analysis:

0.030
0.030

Sulphur (S) (Max)

%

Heat Analysis:
Product Analysis:

0.030
0.030

Silicon (Si)

%

Heat Analysis:
Product Analysis:

1.00 max
1.05 max

Chromium (Cr)

%

Heat Analysis:
Product Analysis:

8.00 - 10.00
7.90 - 10.10

Molybdenum (Mo)

%

Heat Analysis:
Product Analysis:

0.90 - 1.10
0.85 - 1.15

Vanadium (Vn)

%

Heat Analysis:
Product Analysis:

0.04 max
0.05 max


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