Name: China ASTM A387 Cr-Mo Alloy Steel Pressure Vessel Plates Manufacturers Suppliers Factory - Gnee Steel
Brand: GNEE
SKU: 231462492

Description

Technical Parameters

Material :Chromium-Molybdenum Alloy Steel
Grade :ASTM A387 Grade 12 Class 2
Size :Thk 6 mm.x Width 16 mm x Length ≥ 1,219 mm.

Chemical Composition (Heat Analysis):

C=0.05-0.17%, Mn=0.40-0.65%,

P=0.025 %max, S=0.025 %max,

Si= 0.15-0.40%, Cr=0.80-1.15%,

Mo =0.45-0.60%

Chemical Composition(Product Analysis):
C=0.04-0.17%, Mn=0.35-0.73%,

P=0.025 %max, S=0.025 %max,

Si= 0.13-0.45%, Cr=0.74-1.21%,

Mo =0.40-0.65%

Tensile Strength :380-550 Mpa(65-85 ksi)
Yield Strength :≥ 230 Mpa (33 ksi)
%Elongation in 2 in.(50mm):≥ 22 %

ASTM A387 Cr-Mo Alloy Steel Pressure Vessel Plates

ASTM A387 is a chromium-molybdenum steel alloy steel plate that can be used to process steel products, steel structures and steel processing parts. These chromium-molybdenum alloy steel plates are mainly used in welded boilers and pressure vessels in high-temperature environments.

The plates supplied by this standard include ASTM A387 Grades 2, Grade 12, Grade 11, Grade 22, Grade 22L, Grade 21, Grade 21L, Grade 5, Grade 9, Grade 91. All grades except Grades 21L, 22L and 91 are available in two tensile strength grades.

Grades 21L and 22L are only available as Grade 1, while Grade 91 is only available as Grade 2.

All the plates we stock come from several of the most well-known steel mills in China: Baosteel, Wuhan Iron and Steel, Anshan Iron and Steel, Taiyuan Iron and Steel, etc.

ASTM A387 high tensile steel plate chemical composition

Chemical Composition of ASTM A387 Alloy Steel Plates, %
Grade	UNS	C	Mn	P	S	Si	Cr	Mo	Others
Grade 2	S50460	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	K11757	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	K11789	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	K21590	0.04-0.15	0.25-0.66	0.025	0.025	≤0.50	1.88-2.62	0.85-1.15	-
Grade 22L	K21590	≤0.12	0.25-0.66	0.025	0.025	≤0.50	1.88-2.62	0.85-1.15	-
Grade 21	K31545	0.04-0.15	0.25-0.66	0.025	0.025	≤0.50	2.63-3.37	0.85-1.15	-
Grade 21L	K31545	0.12	0.25-0.66	0.025	0.025	≤0.50	2.63-3.37	0.85-1.15	-
Grade 5	S50200	≤0.15	0.25-0.66	0.025	0.025	≤0.55	3.90-6.10	0.40-0.70	-
Grade 9	K90941	≤0.15	0.25-0.66	0.025	0.025	≤1.05	7.90-10.10	0.85-1.15	*A
Grade 91	K90901	0.06-0.15	0.25-0.66	0.025	0.012	0.18-0.56	7.90-9.60	0.80-1.10	*B

ASTM A387 high strength steel sheet mechanical property

Mechanical Properties of ASTM A387 Alloy Steel
Grade	Tensile Strength, ksi[MPa]	Yield Strength, min. ksi[MPa]	Elongation, min. %		Reduction of area, min, %
Grade	Tensile Strength, ksi[MPa]	Yield Strength, min. ksi[MPa]	8 inch	2 inch	Reduction of area, min, %
Grade 2 CL 1	55-80[380-550]	33[230]	18	22	-
Grade 2 CL 2	70-90[485-620]	45[310]	18	22	-
Grade 12 CL 1	55-80[380-550]	33[230]	18	22	-
Grade 12 CL 2	65-85[450-585]	40[275]	19	22	-
Grade 11 CL1	60-85[415-585]	35[240]	19	22	-
Grade 11 CL2	75-100[515-690]	45[310]	18	22	-
Grade 22 CL1	60-85[415-585]	30[205]	-	18	45^*A
Grade 22 CL2	75-100[515-690]	45[310]	-	18	45^*A
Grade 22L CL1	60-85[415-585]	30[205]	-	18	45^*A
Grade 21 CL1	60-85[415-585]	30[205]	-	18	45^*A
Grade 21 CL2	75-100[515-690]	45[310]	-	18	45^*A
Grade 21L CL1	60-85[415-585]	30[205]	-	18	45^*A
Grade 5 CL1	60-85[415-585]	30[205]	-	18	45^*A
Grade 5 CL2	75-100[515-690]	45[310]	-	18	45^*A
Grade 9 CL1	60-85[415-585]	30[205]	-	18	45^*A
Grade 9 CL2	75-100[515-690]	45[310]	-	18	45^*A
Grade 91 CL2	85-110[585-760]	60[415]	-	18	-

Inspections and Tests

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.