ASME SA 387 GR 9

A 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. 

Specifications

Chromium & Molybdenum content (according to the ASME specification)

Designation Nominal Chromium Content (%) Nominal Molybdenum Content (%)
A387 Grade 9 9.00% 1.00%


Tensile Requirements for Class 2 Plates 

Designation Requirement Grade 9
SA387 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 

Element   Chemical Composition (%)
    SA 387 Grade 9
Carbon: Heat Analysis 0.15 max
Product Analysis 0.15 max
Manganese Heat Analysis: 0.30 - 0.60
Product Analysis 0.25 - 0.66
Phosphorus Heat Analysis 0.030
Product Analysis 0.030
Sulphur (max) Heat Analysis 0.030
Product Analysis 0.030
Silicon Heat Analysis 1.00 max
Product Analysis 1.05 max
Chromium: Heat Analysis 8.00 - 10.00
Product Analysis 7.90 - 10.10
Molybdenum Heat Analysis 0.90 - 1.10
Product Analysis 0.85 - 1.15
Vanadium Heat Analysis 0.04 max
Product Analysis 0.05 max




 

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