ASTM A387 Grade 5 Class 2 Steel Plates

Fabricated A387 Grade 5 plates equipped with machined weld-edges

Fabricated ASTM A387 Grade 5 plates equipped with machined weld-edges

ASTM A387 Grade 5 steel is an alloy chromium molybdenum pressure vessel steel plate designed for use in boilers, pressure vessels and heat exchangers at high temperatures.

ASTM A387 Grade 5 is defined by the ASTM/ASME A387/A387M standard differs from the other grades covered by the standard in the chromium and molybdenum content of the steel

A387 Grade 5 steel plate is available ex-stock for immediate delivery. A387 grade 5 is a high quality chromium molybdenum steel plate – rolled by German or Western European mills and kept in a covered warehouse to ensure it is delivered in excellent condition.

Like other low alloy pressure vessel steels it is intended for use it pressure vessels and boilers where the temperature is high. ASTM A387 Grade 5 is particularly suited to this application because of the chromium and molybdenum alloying elements.

It finds wide application in the oil and gas industry and in the power industry where hot liquids and gases are often being transferred between different processing modules.

Our customers use A387 Grade 5 in heat exchangers, boilers and pressure vessels and in a wide variety of ancillary uses such as pipes, flanges and fittings.

We only offer A387 Grade 5 to Class 2 as these have improved physical properties over class 1 plates

A387 Grade 5 Plates Ex-Stock

  • Thickness up to 40mm
  • Width: Up to 3 metres wide
  • Length up to 12 metres long
  • EN10204 to 3.1

European customers can purchase  ASTM A387 Gr 22 from AncoferWaldram or order new rolling directly from Dillinger Hutte. You can purchase a copy of ASTM A387A387M-11 from here

ASTM A387 Grade 5 Pressure Vessel Steel Chemical Composition

Steel GradeCC (Min)SiSi (Min)MnMn (Min)PSCrCr (Min)MoMo (Min)
A387 5 CL20.150.550.660.250.0350.036.13.90.70.4
This table provides the main features of the chemical composition of A387 Grade 5 boiler plate steel as required by ASTM/ASME A387. It is not complete as we have not included many of the minor use cases. These may have a major impact in your application so please use this for reference purposes only and refer to your original and up to date copy of the relevant standard