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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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Introduction
Parameters
Service

SA387/A387 Pressure Vessel Plate Brief Introduction

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). The standard covers multiple grades, such as Gr22, Gr11, and Gr91.
These steel plates are widely used in the manufacture of high-temperature, high-pressure equipment, which is commonly applied in petrochemicals, nuclear power, and electricity.

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.

SA387 Plate Grade 11 & Grade 22 Mechanical Properties

Chemical Requirements

Element Composition %
Element Composition %	SA 387 Grade 11	SA 387 Grade 22
Carbon, max:
Heat analysis	0.05-0.17	0.05-0.15A
Product analysis	0.04-0.17	0.04-0.15A
Manganese, max:
Heat analysis	0.40-0.65	0.30-0.60
Product analysis	0.35-0.73	0.25-0.66
Phosphorus, max:
Heat analysis	0.025	0.025
Product analysis	0.025	0.025
Sulfur, max:
Heat analysis	0.025	0.025
Product analysis	0.025	0.025
Silicon:
Heat analysis	0.50-0.80	0.50 max
Product analysis	0.44-0.86	0.50 max
Chromium:
Heat analysis	1.00-1.50	2.00-2.50
Product analysis	0.94-1.56	1.88-2.62
Molybdenum:
Heat analysis	0.45-0.65	0.90-1.10
Product analysis	0.40-0.70	0.85-1.15

Tensile Requirements For Class 1 Plates

	SA 387 Grade 11	SA 387 Grade 22
Tensile strength, ksi [MPa]	60 to 85 [415 to 585]	60 to 85 [415 to 585]
Yield strength min. ksi [MPa]	35	30
Elongation in 8 in. [200 mm], min. %	19
Elongation in 2 in. [50 mm], min. %	22	18
Reduction of area, min %		45 40

Tensile Requirements For Class 2 Plates

	SA 387 Grade 11	SA 387 Grade 22
Tensile strength, ksi [MPa]	75 to 100 [515 to 690]	75 to 100 [515 to 690]
Yield strength min. ksi [MPal]/(0.2% offset)	45 [310]	45 [310]
Elongation in 8 in. [200 mm], min. %B	18	…
Elongation in 2 in. [50 mm], min. %B	22	18
Reduction of area, min %	…	45 40

Why choose us

ASTM/ASME Certification
Third-party Testing

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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SA387/A387 Pressure Vessel Plate

SA387/A387 Pressure Vessel Plate Brief Introduction

SA387 Plate Grade 11 & Grade 22 Mechanical Properties

Why choose us

SA387/A387 Boiler Steel Plate Chemical Composition

Tensile Requirements For Class 1 Steel Boiler Plate

Tensile Requirements For Class 2 Steel Pressure Vessel Steel Plate