A387Gr12CL1 pressure vessel steel plate owned minimum yield strength at 275 Mpa,and tensile strength within 450-585 Mpa. Pressure vessel steel plate SA387 Grade 12 CL 1 is in American standard ASME SA 387/SA 387M.Boiler steel plate A387 Grade 12 Cl 1 are according to ASTM A387/A387M. These steel materials also shall conform to steel specification A 20/A 20M. These requirements outline the testing and retesting methods and procedures,permissible variations in dimensions and weight,quality and repair of defects,marking,loading,etc.

Chemical Composition and Mechanical Properties:

SA387 Gr.12 CL.1 Chemical Composition
Grade	The Element Max (%)
Grade	C	Si	Mn	P	S	Cr	Mo
SA387 Gr.12 Cl.1	0.04-0.17	0.13-0.45	0.35-0.73	0.035	0.035	0.74-1.21	0.40-0.65

Grade	SA387 Gr.12 CL.1 Mechanical Property
Grade	Thickness	Yield	Tensile	Elongation
SA387 Gr.12 Cl.1	mm	Min Mpa	Mpa	Min %
	t≦50	230	380-550	22
	50<t≦200	-	-	18

Refered Standards for ASME SA387 Alloy Steel Plate

ASTM

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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Shandong Chengshun Metal Materials Co., Ltd. is located in Jinan City, Shandong Province. It is a comprehensive company dealing in high-quality steel products, with a superior geographical location and very convenient transportation. The company has a complete and scientific quality system, and has been recognized by the industry for its integrity, strength and product quality.

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Mainly exported to Europe, Southeast Asia, South Africa, the Middle East, Latin America and other countries and regions, the products are favored by Chinese and foreign users.

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Boiler Pressure Vessel Steel