ASTM A387 Grade 5 Class 2

A387 Grade 5 Class 2 – high quality chromium-molybdenum alloy steel plate, ideal for use in pressure vessels and industrial boilers due to it’s excellent heat resistant and anti corrosion properties.
We can supply plates from our own stockholding in Birmingham or directly from the mill and all plates come with mill test certification and individual stampings.

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

DesignationNominal Chromium Content (%)Nominal Molybdenum Content (%)
A387 Grade 55.00%0.50%

Tensile Requirements for Class 2 Plates:

DesignationRequirementGrade 5
A387 Grade 5Tensile 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:
0.035
0.035
Sulphur (S) (Max)%
Heat Analysis:
Product Analysis:
0.030
0.030
Silicon (Si)%
Heat Analysis:
Product Analysis:
0.50 max
0.55 max
Chromium (Cr)%
Heat Analysis:
Product Analysis:
4.00 - 6.00
3.90 - 6.10
Molybdenum (Mo)%
Heat Analysis:
Product Analysis:
0.45 - 0.65
0.40 - 0.70