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Home > products> SA387/A387 Pressure Vessel Plate
SA387/A387 Pressure Vessel Plate image
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SA387/A387 Pressure Vessel Plate

SA387 steel plates are available in 5, 9, 11, 12, 22 and 91 grades 1 and 2 chromium-molybdenum alloy steel plates for high temperature + corrosive environments. Mainly used for boilers and pressure vessels.

A387 Pressure Vessel Plate ASME Pressure VesselSteel Plate SA387 Alloy Steel Pressure Vessel Plates ASME SA387 Pressure Vessel Plate
Reference Price: $580.00 - $650.00
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SA387/A387 Grade 11 Pressure Vessel Plate Manufacturer

SA387/A387 Pressure Vessel Plate is a series of standards for chromium-molybdenum alloy steel plates used in pressure vessels in the American Standard (ASTM/ASME).

A387/SA387 vessel steel plate is suitable for a temperature range of 316℃-593℃. Its high-temperature properties are of particular interest even in the current trend of applications requiring high-temperature toughness. SA387/A387 steel is usually treated with fine grain, low silicon, low sulfur, calcium, and sometimes Q&T production to achieve the highest level of toughness. SA387/A387 boiler steel plate is available in a wide range of temperatures from 316°C to 593°C.

ASTM A387 Grade 11 pressure vessel plates are chromium-molybdenum alloy steel plates intended primarily for welded boilers and pressure vessels designed for elevated temperature service.

ASME SA-387/ASTM A387 Grade 11 Plate Tensile Requirements

ASME SA-387/ASTM A387
Grade 11 Class 1
Tensile Strength
MPa [ksi]		 415-585
[60-85]
Yield Strength
MPa [ksi], min.		 240
[35]
Elongation in
8″, min. %		 19
Elongation in
2″, min. %		 22
Reduction of
area, min. %		 –

*Class 1 plates of ASTM A387 Gr. 11 may be furnished in all types of heat treatment.

ASME SA-387/ASTM A387
Grade 11 Class 2
Tensile Strength
MPa [ksi]		 450-585
[65-85]
Yield Strength
MPa [ksi], min.		 275
[40]
Elongation in
8″, min. %		 19
Elongation in
2″, min. %		 22
Reduction of
area, min. %		 –

*Class 2 plates of ASTM A387 Gr. 11 shall be furnished in heat treatment other than annealing.

Chemical Requirements for ASME SA387 Grade 11 Alloy Steel Plates

Element Chemical Composition (%)
SA387 Grade 11
Carbon: Heat Analysis: 0.05 – 0.17
Product Analysis: 0.04 – 0.17
Manganese: Heat Analysis: 0.40 – 0.65
Product Analysis: 0.35 – 0.73
Phosphorus: Heat Analysis: 0.035
Product Analysis: 0.035
Sulphur (max): Heat Analysis: 0.035
Product Analysis: 0.035
Silicon: Heat Analysis: 0.50 – 0.80
Product Analysis: 0.44 – 0.86
Chromium: Heat Analysis: 1.00 – 1.50
Product Analysis: 0.94 – 1.56
Molybdenum: Heat Analysis: 0.45 – 0.65
Product Analysis: 0.45 – 0.70

Why choose us

  • ASTM/ASME Certification
  • Third-party Testing

 

 

Specification Parameters
Specification Parameters

SA387/A387 Boiler Steel Plate Chemical Composition

GR. 2 GR. 12 GR. 11 GR. 22 GR. 22L GR. 21 GR. 21L GR. 5 GR. 9 GR. 91*
C 0.05-0.21 0.05-0.17 0.05-0.17 0.05-0.15 0.10 0.05-0.15 0.10 0.15 0.15 0.08-0.12
Mn 0.55-0.80 0.40-0.65 0.40-0.65 0.30-0.60 0.30-0.60 0.30-0.60 0.30-0.60 0.30-0.60 0.30-0.60 0.30-0.60
P 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.020
S 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.025 0.010
Si 0.15-0.40 0.15-0.40 0.50-0.80 0.50 0.50 0.50 0.50 0.50 1.00 0.20-0.50
Cr 0.50-0.80 0.80-1.15 1.00-1.50 2.00-2.50 2.00-2.50 2.75-3.25 2.75-3.25 4.00-6.00 8.00-10.00 8.00-9.50
Mo 0.45-0.60 0.45-0.60 0.45-0.65 0.90-1.10 0.90-1.10 0.90-1.10 0.90-1.10 0.45-0.65 0.90-1.10 0.85-1.05
V – – – – – – – – 0.04 0.18-0.25

Tensile Requirements For Class 1 Steel Boiler Plate

GRADE TENSILE (MPA) YIELD (MPA) ELONG. (50MM) REDUC’N OF AREA*
2, 12 380 – 550 230 min 22% min –
11 415 – 585 240 min 22% min –
22, 21, 5, 9 415 – 585 205 min 18% min 40% min
21L, 22L 415 – 585 205 min 18% min 40% min

 

Tensile Requirements For Class 2 Steel Pressure Vessel Steel Plate

GRADE TENSILE (MPA) YIELD (MPA) ELONG. (50 MM) REDUC’N OF AREA*
2 485 – 620 310 min 22% min –
11 515 – 690 310 min 22% min –
12 450 – 585 275 min 22% min –
22, 21, 5, 9 515 – 690 310 min 18% min 40% min
91 585 – 760 415 min 18% min –
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SA387/A387 Pressure Vessel Plate
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