Steel Plate - Pressure Vessel related information - Knowledge

Steel Plate - Pressure Vessel related information

what is SA387 Steel Plate - Pressure Vessel?

SA387 steel plate is a chromium-molybdenum alloy steel specifically designed for high-temperature and high-pressure service in welded pressure vessels. It offers excellent creep strength, corrosion resistance, and stability at elevated temperatures, making it a standard material for critical applications like refinery reactors, heat exchangers, and power boilers.

SA387/ASTM A387 GR 5 CLASS 2

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.

SA387/ASTM A387 GR 9 CLASS 2

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.

SA387/ASTM A387 GR 11 CLASS 2

A pressure vessel grade steel for use in elevated temperature service, ASME SA387 Grade 11 Class 2 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.

SA387/ASTM A387 GR 12 CLASS 2

Engineered for use in elevated temperature service, ASME SA387 Grade 12 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.

SA387/ASTM A387 GR 22 CLASS 2

We supply ASME SA387 Grade 22 Class 2 plates to 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.

SA387/ASTM A387 GR 91 CLASS 2

Where resistance to high temperature and good anti-corrosion characteristics are required, ASME SA387 Grade 91 Class 2 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.

ASTM A387/ SA387

Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum
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Mechanical Properties:

A 387 Grade 5		A 387 Grade 9		A 387 Grade 11		A 387 Grade 12		A 387 Grade 22
	Class 1	Class 2	Class 1	Class 2	Class 1	Class 2	Class 1	Class 2	Class 1	Class 2
Tensile	60-85	75-100	60-85	75-100	60-85	70-90	50-80	65-85	60-85	75-100
Strength (ksi)
Tensile	415-585	515-690	415-585	515-690	415-585	485-620	380-550	450-585	415-585	515-690
Strength (MPa)
Yield	30	45	30	45	35	45	33	40	30	45
Strength (ksi)
Yield	205	310	205	310	240	310	230	275	205	310
Strength (MPa)
Elongation					19	18	18	19
in 200mm (%)
Elongation	18	18	18	18	22	22	22	22	18	18
in 50mm (%)
Reduction of	45	45	45	45					45	45
area in %

Chemical Properties:

Grade 5	Grade 9	Grade 11	Grade 12	Grade 22
Carbon
Heat Analysis	0.15 max	0.15 max	0.05 – 0.17	0.05 – 0.17	0.05 – 0.15
Product Analysis	0.15 max	0.15 max	0.04 – 0.17	0.04 – 0.17	0.04 – 0.15
Manganese
Heat Analysis	0.3 – 0.6	0.30 – 0.6	0.4 – 0.65	0.4 – 0.65	0.3 – 0.6
Product Analysis	0.25 – 0.66	0.25 – 0.66	0.35 – 0.73	0.35 – 0.73	0.25 – 0.66
Phosphorous
Heat Analysis	0.035	0.03	0.035	0.035	0.035
Product Analysis	0.035	0.03	0.035	0.035	0.035
Sulphur
Heat Analysis	0.03	0.03	0.035	0.035	0.035
Product Analysis	0.03	0.03	0.035	0.035	0.035
Silicon
Heat Analysis	0.5 max	1.0 max	0.5 – 0.80	0.15 – 0.4	0.5 max
Product Analysis	0.55 max	1.05 max	0.44 – 0.86	0.13 – 0.45	0.5 max
Chromium
Heat Analysis	4.00 – 6.00	8.0 – 10.0	1.0 – 1.5	0.8 – 1.15	2.0 – 2.5
Product Analysis	3.9 – 6.1	7.9 – 10.1	0.94 – 1.56	0.74 – 1.21	1.88 – 2.62
Molybdenum
Heat Analysis	0.45 – 0.65	0.9 – 1.1	0.45 – 0.65	0.45 – 0.6	0.9 – 1.1
Product Analysis	0.40 – 0.7	0.85 1.15	0.40 – 0.7	0.4 – 0.65	0.85 – 1.15

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What is A387 grade 11 material?

The ASTM A387 specification is the Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum intended primarily for use in welded boilers and pressure vessels designed for elevated temperature service. SSAB can supply A387 Grade 11 to the tension test requirements for Class 1 and/or Class 2.

What is the composition of A387 steel?

Composition: ASTM A387 steel plates typically contain chromium (up to 9% or more) and molybdenum (up to 2.25% or more), which enhance their strength and corrosion resistance at high temperatures.

What is the difference between A182 and A387?

Both ASTM A182 grade F11 class 2 and ASTM A387 grade 22 steel are iron alloys. They have a very high 99% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

What is ASTM A387 Grade 11 equivalent to?

ASTM A387 grade 11 equivalent steel is ASME SA387 grade 11. ASTM A387 grade 11 covers A387 grade 11 class 1 and A387 grade 11 class 2, which are equivalent to ASME SA387 grade 11 class 1 and SA387 grade 11 class 2 respectively.

Full specification and details are available on request. The above information is provided for guidance purposes only. For specific design requirements please contact our technical sales staff.

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