ASME SA387 GR.22 CL1 Pressure Vessel Steel plate

A387 Grade 22 CL2 under steel specification standard ASTM A387/A387M and ASME SA387/SA387M are popularly used for welded boilers and pressure vessels designed for elevated temperature service.The main different between steel plate SA387 Grade 22 CL 1 and SA387 Grade 22 CL 2 is the mechanical properity,for pressure vessel steel plate A387 Grade 22 CL 1,the tensile strength shall be 415-585 Mpa,minimum yield point is 205 Mpa.And for pressure vessel steel plate A387 Grade 22 CL 2,the minimum yield strength shall be 310 Mpa,tensile strength within 515-690 Mpa.

SA387 Gr.22L CL.1 Chemical Composition
Grade	The Element Max (%)
	C	Si	Mn	P	S	Cr	Mo
SA387 Gr.22L Cl.1	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.22L CL.1 Mechanical Property
	Thickness	Yield	Tensile	Elongation
SA387 Gr.22L Cl.1	mm	Min Mpa	Mpa	Min  %
	t≦50	205	415-585	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]