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ASTM A387 Grade 5 Class 1(A387GR5CL1) Boiler And Pressure Vessel Steel Plate

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ASTM A387 Grade 5 Class 1(A387GR5CL1) Boiler And Pressure Vessel Steel Plate
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ASTM A387 Grade 5 Class 1 (A387GR5CL1) steel plate is a chromium-molybdenum alloy steel plate specifically designed for welded boilers and pressure vessels in high-temperature service environments, offering excellent high-temperature strength, corrosion resistance, and creep resistance.

  • Standard :

    ASTM A387/A387M

  • Grade :

    A387 Grade 5 Class 1 (A387GR5CL1)

  • Thickness :

    6.0-300.0 mm

  • Width :

    1500-4050 mm

  • Length :

    3000-15000 mm

Special thickness, width, and length can be negotiated separately.
We also provide customized processing services.If you have any questions, please contact us.

Overview

ASTM A387 Grade 5 Class 1 is a high-performance chromium-molybdenum alloy steel plate characterized by excellent high-temperature performance, hydrogen corrosion resistance, and weldability. It serves as a critical material for high-temperature pressure vessels in demanding applications within industries such as petrochemical and power generation.


GradeA387 Grade 5 Class 1 (A387GR5CL1)
StandardASTM A387/A387M: Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum
Delivery ConditionsAnnealing (A)
WeldabilityThe weldability is good, but strict preheating, controlled interpass temperature, and post-weld heat treatment (PWHT) procedures are required to prevent cold cracking.
MachinabilityIt can undergo machining such as cutting, drilling, and milling, and supports hot forming. Stress relief annealing is required after cold forming.
Quality ControlUltrasonic Testing (UT) is performed in accordance with SA-578 to ensure the absence of internal laminations and discontinuities.


Key Features and Advantages

1. Excellent high-temperature strength: It has strong resistance to creep and stress rupture at high temperatures.

2. Good resistance to hydrogen corrosion: Chromium can form a stable oxide layer, effectively resisting hydrogen attack in high-temperature hydrogen environments.

3. Moderate oxidation resistance: Its oxidation resistance lies between that of carbon steel and stainless steel.

4. Post-weld heat treatment required: Proper post-weld heat treatment must be performed to ensure the performance of welded joints and relieve stress.


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