SA 387 Alloy Steel Plates

Steel Plate Industrial Plates manufacturer & supplier ASTM A 387, ASME SA 387, is one of our most popular products. It is a low alloy pressure vessel quality steel for high temperatures. We have a wide range of plate sizes available and thicknesses range from 6mm to 100mm.

The ASME SA387 standards covers the supply of weldable chrome molybdenum alloy steel plates for pressure vessels used in elevated temperature service.

The added molybdenum and chromium provides excellent corrosion resistance and high temperature resistance respectively.

ASME SA387 standard plates are used by the world’s leading fabricators who in turn, supply primarily to the oil and petrochemical industry. Applications for ASME SA387 include pressurized vessels, industrial boilers, heat exchangers and pipe work.

Thickness from 5mm to 150mm
Width: from 1,500mm to 2,500mm
Length: from 6,000mm to 12,000mm

Technical conditions of SA 387 Alloy Steel Plates

1) Ultrasonic tested as per SA 578 or any other as per requirement
2) MTC acc to EN 10204 / 3.2
3) Charpy Impact tested at -20 / – 46 DegC.
4) Furnace Normalised
5) BQ Plates with IBR form IV

The Following Grades Are Available:

ASTM / ASME SA 387 GR. 11 CL. 1 / 2
ASTM / ASME SA 387 GR. 12 CL. 1 / 2
ASTM / ASME SA 387 GR. 9 CL. 1 / 2
ASTM/ ASME SA 387 GR. 22 CL. 1 / 2
ASTM / ASME SA 387 GR. 5 CL. 1 / 2
ASTM / ASME SA 387 GR.91 CL. 1 / 2
DIN 17175 15Mo3 / 16Mo3
ASTM SPECIFICATION A 387 GR. 2 CL. 2 / 204 GR. A / 204. B

This specification covers chromium-molybdenum alloy steel plates for welded boilers and pressure vessels designed for elevated temperature service. Materials considered under this specification are available in grades 2, 12, 11, 22, 22L, 5, 9 and 91. The steel materials shall be killed and shall be thermally treated. The steel specimens shall undergo heat analysis and product analysis and shall conform to the chemical requirements for carbon, manganese, phosphorus, sulfur, silicon, chromium, molybdenum, nickel, vanadium, columbium, boron, nitrogen, aluminum, titanium, and zirconium. The steel specimens shall also undergo tension tests and shall conform to the required values of tensile strength, yield strength, and elongation.

This specification covers molybdenum alloy steel plates, intended particularly for welded boilers and other pressure vessels. Plates under this specification are available in three grades having different strength levels: Grade A; Grade B; and Grade C. The steel shall be killed. The steel shall conform to the chemical requirements specified. Tension tests on plates shall conform to the requirements specified. Plates under this specification are available in three grades having different strength levels as follows:

Sourced from some of Western Europe’s & Asia’s finest steel mills, Steber Steel stock a wide range of ASME SA387 Class 2 plates which are available for shipment worldwide.

ASTM A 387, ASME SA 387, is one of our most popular products. It is a low alloy pressure vessel quality steel for high temperatures. We have a wide range of plate sizes available and thicknesses range from 6 – 100mm.

ASME SA387 Grade 5 Alloy Steel Plates

A high quality chrome molybdenum alloy steel plate intended specifically for use in weldable carbon steel pressure vessels at elevated temperatures. Added molybdenum gives the material greater temperature tensile strength and the chromium provides improved corrosion resistance.

Equivalents:

BS EN ASTM/ASME DIN
SA387-5-2

Specifications ASME SA387 Grade 5 Alloy Steel Plates:

Chromium & Molybdenum content (according to the ASME specification):

Designation Nominal Chromium
Content (%)
Nominal Molybdenum
Content (%)
SA387 Grade 5 5.00% 0.50%

Tensile Requirements for ASME SA387 Grade 5 Alloy Steel Plates Class 2 Plates:

Designation: Requirement: Grade 5
SA387 Grade 5 Tensile strength, ksi [MPA] 75 to 100 [515 to 690]
Yield strength, min, ksi [MPa]/(0.2% offset) 45 [310]
Elongation in 8 in. [200mm], min %
Elongation in 2 in. [50mm], min, % 18
Reduction of area, min % 45 (measured on round specimen)
40 (measured on flat specimen)

Chemical Requirements for ASME SA387 Grade 5 Alloy Steel Plates:

Element Chemical Composition (%)
SA 387 Grade 5
Carbon: Heat Analysis: 0.15 max
Product Analysis: 0.15 max
Manganese: Heat Analysis: 0.30 – 0.60
Product Analysis: 0.25 – 0.66
Phosphorus: Heat Analysis: 0.035
Product Analysis: 0.035
Sulphur (max): Heat Analysis: 0.030
Product Analysis: 0.030
Silicon: Heat Analysis: 0.50 max
Product Analysis: 0.55 max
Chromium: Heat Analysis: 4.00 – 6.00
Product Analysis: 3.90 – 6.10
Molybdenum: Heat Analysis: 0.45 – 0.65
Product Analysis: 0.40 – 0.70

ASME SA387 Grade 9 Alloy Steel Plates

A weldable carbon steel plates for pressure vessels and boilers used in elevated temperatures. The material benefits from added chromium and molybdenum which gives the steel greater corrosion resistance and resistance to heat. SA387 Grade 9 is used by fabricators who serve the oil, gas and petrochemical industry.

ASME SA387 Grade 9 is available ex stock form our UK warehouse and we can dispatch to clients on a global basis. As with all our carbon steel plates, the material comes with mill certification and stampings.

Equivalents for ASME SA387 Grade 9 Alloy Steel Plates

BS EN ASTM/ASME DIN
SA387-9-2

Specifications for ASME SA387 Grade 9 Alloy Steel Plates

Chromium & Molybdenum content (according to the ASME specification):

Designation Nominal Chromium
Content (%)
Nominal Molybdenum
Content (%)
A387 Grade 9 9.00% 1.00%

Tensile Requirements for ASME SA387 Grade 9 Alloy Steel Plates Class 2 Plates

Designation: Requirement: Grade 9
SA387 Grade 9 Tensile strength, ksi [MPA] 75 to 100 [515 to 690]
Yield strength, min, ksi [MPa]/(0.2% offset) 45 [310]
Elongation in 8 in. [200mm], min %
Elongation in 2 in. [50mm], min, % 18
Reduction of area, min % 45 (measured on round test specimens)
40 (measured on flat test specimen)

Chemical Requirements for ASME SA387 Grade 9 Alloy Steel Plates

Element Chemical Composition (%)
SA 387 Grade 9
Carbon: Heat Analysis: 0.15 max
Product Analysis: 0.15 max
Manganese: Heat Analysis: 0.30 – 0.60
Product Analysis: 0.25 – 0.66
Phosphorus: Heat Analysis: 0.030
Product Analysis: 0.030
Sulphur (max): Heat Analysis: 0.030
Product Analysis: 0.030
Silicon: Heat Analysis: 1.00 max
Product Analysis: 1.05 max
Chromium: Heat Analysis: 8.00 – 10.00
Product Analysis: 7.90 – 10.10
Molybdenum: Heat Analysis: 0.90 – 1.10
Product Analysis: 0.85 – 1.15
Vanadium: Heat Analysis: 0.04 max
Product Analysis: 0.05 max

ASME SA387 Grade 11 Alloy Steel Plates

As a pressure vessel grade steel for use in elevated temperature service, is used in a variety of industries and is highly effective, particularly in the oil, gas and petrochemical industry, where liquids and gases are often stored at higher temperatures.
The higher levels of chromium also provide excellent corrosion and oxidation resistance, which is a must in sour gas applications.
Please refer to our technical specifications below for ASME SA387 Grade 11 Class 2…

Equivalents

BS EN ASTM/ASME DIN
621 B SA387-11-2

Specifications for ASME SA387 Grade 11 Alloy Steel Plates

Chromium & Molybdenum content (according to the ASME specification):

Designation Nominal Chromium
Content (%)
Nominal Molybdenum
Content (%)
SA387 Grade 11 1.25% 0.50%

Tensile Requirements for ASME SA387 Grade 11 Alloy Steel Plates Class 2 Plates

Designation: Requirement: Grade 11
SA387 Grade 11 Tensile strength, ksi [MPa] 75 to 100 [515 to 690]
Yield strength, min, ksi [MPa]/(0.2% offset) 43 [310]
Elongation in 8 in. [200mm], min % 18
Elongation in 2 in. [50mm], min, % 22
Reduction of area, min %

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

ASME SA387 Grade 12 Alloy Steel Plates
Engineered for use in elevated temperature service, is a chrome molybdenum carbon alloy steel for use in weldable pressure vessels and industrial boilers.

The material benefits from added chromium which provides excellent corrosion and oxidation resistance making it ideal for sour service applications in the oil and gas industry.

Equivalents

BS EN ASTM/ASME DIN
620 B 13 CRMO 45 SA387-12-2 13 CRMO 44

Specifications for ASME SA387 Grade 12 Alloy Steel Plates

Chromium & Molybdenum content (according to the ASME specification):

Designation Nominal Chromium
Content (%)
Nominal Molybdenum
Content (%)
SA387 Grade 12 1.00% 0.50%

Tensile Requirements for ASME SA387 Grade 12 Alloy Steel Plates Class 2 Plates

Designation: Requirement: Grade 12
SA387 Grade 12 Tensile strength, ksi [MPA] 65 to 85 [450 to 585]
Yield strength, min, ksi [MPa]/(0.2% offset) 40 [275]
Elongation in 8 in. [200mm], min % 19
Elongation in 2 in. [50mm], min, % 22
Reduction of area, min %

Chemical Requirements for ASME SA387 Grade 12 Alloy Steel Plates

Element Chemical Composition (%)
ASME SA387 Grade 12
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: 0.15 – 0.40
Product Analysis: 0.13 – 0.45
Chromium: Heat Analysis: 0.80 – 1.15
Product Analysis: 0.74 – 1.21
Molybdenum: Heat Analysis: 0.45 – 0.60
Product Analysis: 0.40 – 0.65

ASME SA387 Grade 22 Alloy Steel Plates
We supply plates to global fabricators serving the oil, gas and petrochemical industry.

These industries require a pressure vessel grade steel which works well in elevated temperatures and our material serves this purpose well. And with good corrosion and oxidation resistance, SA387 Grade 22 Class 2 plates are a good option for sour gas environments too.

Equivalents for ASME SA387 Grade 22 Alloy Steel Plates

BS EN ASTM/ASME DIN
622-515B 10 CRMO910 SA387-22-2 10 CRMO910

Specifications for ASME SA387 Grade 22 Alloy Steel Plates

Chromium & Molybdenum content (according to the ASME specification):

Designation Nominal Chromium
Content (%)
Nominal Molybdenum
Content (%)
SA387 Grade 22 2.25% 1.00%

Tensile Requirements for ASME SA387 Grade 22 Alloy Steel Plates Class 2 Plates

Designation: Requirement: Grade 22
SA387 Grade 22 Tensile strength, ksi [MPA] 75 to 100 [515 to 690]
Yield strength, min, ksi [MPa]/(0.2% offset) 45 [310]
Elongation in 8 in. [200mm], min %
Elongation in 2 in. [50mm], min, % 18
Reduction of area, min % 45 (measured on round specimen)
40 (measured on flat specimen)

Chemical Requirements for ASME SA387 Grade 22 Alloy Steel Plates

Element Chemical Composition (%)
SA387 Grade 22
Carbon: Heat Analysis: 0.05 – 0.15
Product Analysis: 0.04 – 0.15
Manganese: Heat Analysis: 0.30 – 0.60
Product Analysis: 0.25 – 0.66
Phosphorus: Heat Analysis: 0.035
Product Analysis: 0.035
Sulphur (max): Heat Analysis: 0.035
Product Analysis: 0.035
Silicon: Heat Analysis: 0.50 max
Product Analysis: 0.50 max
Chromium: Heat Analysis: 2.00 – 2.50
Product Analysis: 1.88 – 2.62
Molybdenum: Heat Analysis: 0.90 – 1.10
Product Analysis: 0.85 – 1.15

ASME SA387 Grade 91 Alloy Steel Plates

Where resistance to high temperature and good anti-corrosion characteristics are required, is a carbon alloy steel plate is a material to consider. It is a pressure vessel grade steel which is used commonly by fabricators who supply the oil and gas industry.

Due to the materials excellent corrosion resistant properties, SA387 Grade 91 is also an option for use in sour service environments. The material has good weldability and with its heat resistant qualities, the material is a highly versatile steel which can be used in numerous applications.

Equivalents for ASME SA387 Grade 91 Alloy Steel Plates

BS EN ASTM/ASME DIN
SA387-91-2

Specifications for ASME SA387 Grade 91 Alloy Steel Plates

Chromium & Molybdenum content (according to the ASME specification):

Designation Nominal Chromium
Content (%)
Nominal Molybdenum
Content (%)
SA387 Grade 91 9.00% 1.00%

Tensile Requirements for ASME SA387 Grade 91 Alloy Steel Plates Class 2 Plates

Designation: Requirement: Grade 91
SA387 Grade 91 Tensile strength, ksi [MPA] 85 to 110 [585 to 760]
Yield strength, min, ksi [MPa]/(0.2% offset) 60 [415]
Elongation in 8 in. [200mm], min %
Elongation in 2 in. [50mm], min, % 18
Reduction of area, min %

Chemical Requirements for ASME SA387 Grade 91 Alloy Steel Plates

Element Chemical Composition (%).
SA387 Grade 91
Carbon: Heat Analysis: 0.08 – 0.12
Product Analysis: 0.06 – 0.15
Manganese: Heat Analysis: 0.30 – 0.60
Product Analysis: 0.25 – 0.66
Phosphorus: Heat Analysis: 0.020
Product Analysis: 0.025
Sulphur (max): Heat Analysis: 0.010
Product Analysis: 0.012
Silicon: Heat Analysis: 0.20 – 0.50
Product Analysis: 0.18 – 0.56
Chromium: Heat Analysis: 8.00 – 9.50
Product Analysis: 7.90 – 9.60
Molybdenum: Heat Analysis: 0.85 – 1.05
Product Analysis: 0.80 – 1.10
Nickel, max: Heat Analysis: 0.40
Product Analysis: 0.43
Vanadium: Heat Analysis: 0.18 – 0.25
Product Analysis: 0.16 – 0.27
Columbium: Heat Analysis: 0.06 – 0.10
Product Analysis: 0.05 – 0.11
Nitrogen: Heat Analysis: 0.030 – 0.070
Product Analysis: 0.025 – 0.080
Aluminium: Heat Analysis: 0.02
Product Analysis: 0.02
Titanium: Heat Analysis: 0.01
Product Analysis: 0.01
Zirconium: Heat Analysis: 0.01
Product Analysis: 0.01