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P355nl1 Boiler Pressure Vessel Steel Plate Astm 285 C ASTM A387 Cr-Mo Alloy Steel

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P355nl1 Boiler Pressure Vessel Steel Plate Astm 285 C ASTM A387 Cr-Mo Alloy Steel

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P355nl1 Boiler Pressure Vessel Steel Plate Astm 285 C ASTM A387 Cr-Mo Alloy Steel

ASTM A387 Cr-mo alloy steel pressure vessel plates

ASTM A387 is the standard specification for pressure vessel plates, alloy steel, chromium-molybdenum. These Cr-Mo alloy steel plates are primarily manufactured for welded boilers and pressure vessels for elevated temperature service.

GRADE

Type

Grade

Standard

Application

Steel plates for boilers and pressure vessels

Q245R/20g,Q345R

(S)A299M
(S)A515M(Gr.60,65,70)
(S)A204M(Gr.A,B,C)
(S)A387M(Gr.11,12,22)
(S)A537M(GL.1,CL.2)
(S)A662M(Gr.A.B,C)
(S)A302M(Gr.A,B,C,D)
(S)A737M(Gr.B,C)
(S)A738M(Gr.A,B,C)
(S)A533M(,I)
P235GH,P265GH,P295GH
P355GH,16Mo3,13CrMo4-5
...

ASTM,ASME,DIN,JIS,GB

Widely used in petroleum, chemical, power station, boiler and other industries, used to make reactors, heat exchangers, separators, spherical tanks, oil and gas tanks, liquefied gas tanks, nuclear reactor pressure shells, boiler drums, liquefied petroleum gas cylinders, Equipment and components such as high-pressure water pipes and turbine volutes of hydropower stations.

CHEMICAL COMPOSITION-ASTM A387 Alloy Steel Plates,%

Element	C	Mn	P	S	Si	Cr	Mo
Grade 2	0.04~0.21	0.50~0.88	0.025	0.025	0.13~0.45	0.46~0.85	0.40~0.65
Grade 12	0.04~0.17	0.35~0.73	0.025	0.025	0.13~0.45	0.74~1.21	0.40~0.65
Grade 11	0.04~0.17	0.35~0.73	0.025	0.025	0.44~0.86	0.94~1.56	0.40~0.70
Grade 22	0.04~0.15	0.25~0.66	0.025	0.025	≤0.05	1.88~2.62	0.85~1.15
Grade 22L	≤0.12	0.25~0.66	0.025	0.025	≤0.05	1.88~2.62	0.85~1.15
Grade 21	0.04~0.15	0.25~0.66	0.025	0.025	≤0.05	2.63~3.37	0.85~1.15
Grade 21L	0.12	0.25~0.66	0.025	0.025	≤0.05	2.63~3.37	0.85~1.15
Grade 5	≤0.15	0.25~0.66	0.025	0.025	≤0.55	3.90~6.10	0.40~0.70
Grade 9	≤0.15	0.25~0.66	0.025	0.025	≤1.05	7.90~10.10	0.85~1.15
Grade 91	0.06~1.15	0.25~0.66	0.025	0.012	0.18~0.56	7.90~9.60	0.80~1.10

HEAT TREATMENT :

Except for Grade 91, all ASTM A387 plates shall be thermally treated either by annealing, normalizing and tempering, or, when permitted by the purchaser, accelerated cooling from the austenitizing temperature by air blasting or liquid quenching, followed by tempering. The minimum tempering temperatures for grades (2, 12 & 11), grades(22, 22L, 21, 21L & 9), grades 5 are respectively 1150°F[620°C], 1250°F[675°C], 1300°[705°C].
Grade 91 plates shall be thermally treated, either by normalizing and tempering or by accelerated cooling from the austenitizing temperature by air blasting or liquid quenching, followed by tempering. Grade 91 plates shall be austenitized at 1900 to 1975°F [1040 to 1080°C] and shall be tempered at 1350 to 1470°F [730 to 800°C].

INSPECTION AND TEST:

The inspection and tests that shall be alternately performed on ASTM A387 alloy steel plates include: tension test, Charpy V-Notch impact test, drop weight test, high-temperature tension test, ultrasonic examination, magnetic particles examination.

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