ASME SA387 GR.22 CL2 Boiler and Pressure Vessel Steel plate

Classification :

ASME SA387 is a chromium molybdenum alloy steel plate intended primarily for welded boiler and pressure vessels designed of elevated temperature service.

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Boiler Pressure Vessel Steel

ASME SA387 GR.22 CL2 Pressure Vessel Steel plate Descriptions:

SA 387 GR.22 CL.2 PLATE is having chromium of 2.25% and molybdenum of 1% and ability to work in 600 Deg C temperatures surrounding effectively. The molybdenum and chromium steel plates are working effectively at different temperature continually offering best performance. The addition of molybdenum in SA 387 alloy is increasing the tensile strength of the plates at greater temperature. Also, it is providing excellent corrosion resistance ability and oxidation as well by increasing the lattice strain. This is effectively stopping the corrosive agent from iron dissolving and gives good heat resistance ability and becomes a good choice for gas surrounding. Also, it has good weldability. Thus, this plate is highly demanded globally.

Chemical Composition and Mechanical Properties:

SA387 Gr.22 CL.2 Chemical Composition
Grade	The Element Max (%)
Grade	C	Si	Mn	P	S	Cr	Mo
SA387 Gr.22 Cl.2	0.04-0.15	0.50	0.30-0.60	0.035	0.035	1.88-2.62	0.85-1.15

Grade	SA387 Gr.22 CL.2 Mechanical Property
Grade	Thickness	Yield	Tensile	Elongation
SA387 Gr.22 Cl.2	mm	Min Mpa	Mpa	Min %
	t≦50	310	515-690	18
	50<t≦200	-	-	-

Refered Standards for ASME SA387 Alloy Steel Plate

ASME

SA20/A20M: General requirements for pressure vessel plates.
SA370: Test specification for mechanical properties of steel
SA435/A435M: For straight-beam ultrasonic examination of steel plates
SA577/A577M: For ultrasonic angle beam examination of steel plates
SA578/A578M: For straight beam UT examination of rolled steel plates in special applications
SA1017/A1017M: Specification for pressure vessle plates of alloy steel, chromium-molybdenum-tungsten

AWS Specification

A5.5/A5.5M: Low alloy steel electrodes for shield metal arc welding.
A5.23/A5.23M: Low alloy steel electrodes for fulxes for submerged arc welding.
A5.28/A5.28M: For gas shielded arc welding
A5.29/A5.29M: For flux cored arc welding.

Heat Treatment for SA387 Chrom Moly Alloy Steel Plate

Chrome moly alloy steel plate under ASME SA387 shall be killed steel, with thermally treated either by annealing, normarlizing and tempering. Or in case agreed by buyer, accelerated cooling from the austenitizing temperature by air blasting or liquid quenching, followed by tempering, minimum tempering temperatures shall be as below table:

Grade	Temperature, °F [°C]
2, 12 and 11	1150 [620]
22, 22L, 21, 21L and 9	1250 [675]
5	1300 [705]

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Boiler Pressure Vessel Steel