ASTM A387 Chrom - Moly Steel Plate Manufacturer

About ASTM A387 Steel Plate

Thickness: 5-100mm
Length: 2000mm, 4000mm, or as required
Width: 1000mm, 1500mm, or as required
Application: steel boiler plate, pressure vessel plate
Supplementary Technology: Annealing, normalizing plus tempering, or when the buyers agreed, Using blast or liquid quenching method accelerated cooling from austenitizing temperature, followed by tempering.
Surface: Coated or Shot Blasting and Painting
Delivery state: Hot Rolled, Cold Rolled
Steel Grade: Grade 2, Grade 12, Grade 11, Gr.22, Gr.22L, Gr.21, Gr.21L, Gr.5, Gr.9, Gr.91

Product Scope：

ASTM A387 specification covers chromium-molybdenum alloy steel plates for welded boilers and pressure vessels manufactured for elevated temperature service. Available steel plate grades are 2, 12, 11, 22, 22L, 21, 21L, 5, 9 and 91. Steel product shall be killed and heat treated. The petrochemical, hydrocarbon processing and coal conversion industries have been utilizing this steel for decades, it varies according to the chromium and molybdenum. Most commonly used are Grade 12, 11, 22, and 5. Further more, these grades are available in 2 strength levels-class1 and class2.

ASTM A387 steel plate are typically applied in the temperature range from 316℃ to 593℃. The elevated temperature properties of these alloy steel plates are still of particular usage, now, ASTM A387 steel plate are manufactured to be fine grain, low silicon, low sulfur, calcium treated and occasionally produced Q&T to give the highest levels of toughness.

ASTM A387 Chemical Composition:

Chemical Requirements for ASTM A387 Pressure Vessel Plates
Elements	Gr.2	Gr.12	Gr.11	Gr.22	Gr.22L	Gr.21	Gr.21L	Gr.5	Gr.9	Gr.91
Elements	S50460	K11757	K11789	K21590	K21590	K31545	K31545	S50200	K90941	K90901
Carbon, max	0.04-0.21	0.04-0.17	0.04-0.17	0.04-0.15A	0.12 max	0.04-0.15A	0.12 max	0.15 max	0.15 max	0.06-0.15
Manganese	0.50-0.88	0.35-0.73	0.35-0.73	0.25-0.66	0.25-0.66	0.25-0.66	0.25-0.66	0.25-0.66	0.25-0.66	0.25-0.66
Phosphorous, max	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025
Sulfur, max	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.025	0.012
Silicon	0.13-0.45	0.13-0.45	0.44-0.86	0.50 max	0.50 max	0.50 max	0.50 max	0.55 max	1.05 max	0.18-0.56
Chromium	0.46-0.85	0.74-1.21	0.94-1.56	1.88-2.62	1.88-2.62	2.63-3.37	2.63-3.37	3.90-6.10	7.90-10.10	7.90-9.60
Molybdenum	0.40-0.65	0.40-0.65	0.40-0.70	0.85-1.15	0.85-1.15	0.85-1.15	0.85-1.15	0.40-0.70	0.85-1.15	0.80-1.10
Nickel, max	-	-	-	-	-	-	-	-	-	0.43
Vanadium	-	-	-	-	-	-	-	-	0.05 max	0.16-0.27
Columbium	-	-	-	-	-	-	-	-	-	0.05-0.11
Nitrogen	-	-	-	-	-	-	-	-	-	0.025-0.080
Aluminum, max	-	-	-	-	-	-	-	-	-	0.02
Titanium, max	-	-	-	-	-	-	-	-	-	0.01
Zirconium, max	-	-	-	-	-	-	-	-	-	0.01
1. The carbon content for plates over 5 in. [125 mm] in thickness is 0.17 max on product analysis2. Measured on round test specimens.3. Measured on flat specimen.

ASTM A387 Mechanical Property:

Tensile Requirements for ASTM A387 Class 1 Pressure Vessel Plates
	Grade 2 and 12	Grade 11	Grade 22, 21, 5, 9, 21L, 22L
Tensile Strength Ksi(Mpa)	55~80 (380~550)	60~85 (415~585)	60~85 (415~585)
Yield Strength, min Ksi(Mpa)	33(230)	35(240)	30(205)
Elongation in 8 in.[200mm], min, %	18	19	-
Elongation in 2 in.[50mm], min, %	22	22	18
Reduction of area, min, %	-	-	45B 40C

Tensile Requirements for ASTM A387 Class 2 Pressure Vessel Plates
	Grade 2	Grade 11	Grade 12	Grade 22, 21, 5, 9	Grade 91
Tensile Strength Ksi(Mpa)	70~90 (485~620)	75~100 (515~690)	65~85 (450~585)	75~100 (515~690)	85~110 (585~760)
Yield Strength, min Ksi(Mpa)	45(310)	45(310)	40(275)	45(310)	60(415)
Elongation in 8 in.[200mm], min, %	18	18	19	-	-
Elongation in 2 in.[50mm], min, %	22	22	22	18	18
Reduction of area, min, %	-	-		45B 40C	-

ASTM A387 Equivalent steel grade:

BS	EN	ASTM/ASME	DIN
621 B	–––	SA387-11-2	–––
622-515B	10 CRMO910	SA387-22-2	10 CRMO910
620 B	13 CRMO 45	SA387-12-2	13 CRMO 44
–––	–––	SA387-9-2	–––
–––	–––	SA387-91-2	–––

If you are interested in buying ASTM A387 steel plate products, contact us now for the latest price or check the following table for equivalent steel grade of ASTM A387.

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