What is the difference between A387 Class 1 and A387 Class 2 Plate ?

A387 Class 1 and Class 2 plates have the same chemical composition but differ in mechanical properties, with Class 2 having higher tensile and yield strength than Class 1 due to a more rigorous heat treatment (often including quenching and tempering), making Class 2 suitable for higher stress/temperature applications, while Class 1 is for less demanding uses, though Class 1 might have slightly different elongation values depending on the grade.

A387 GR.11 CL.1 and A387 GR.11 CL.2 steel have the same chemical composition requirement. Below are the details of A387 GR.11 steel plate.

For material A387 GR.11 CL.2, "Class" for two classes of tensile strength levels. 387 GR.11 CL.1 and A387 GR.11 CL.2 steel has different tensile requirements. Below is the detailed mechanical properties for differences between A387 GR.11 CL.2 and A387GR.11 CL. 1.

The material A387GR.11 alloy steel plates shall be thermally treated either by annealing, normalizing and tempering, or, when permitted by the purchaser, accelerated cooling from the austenitizing temperature by air blasting or liquid quenching, followed by tempering. And the minimum tempering temperatures shall be 1150°F (or 620°C).

Based on the differences in chemical composition and mechanical properties, the application scenarios of the two plates are clearly divided.

A387 Class 1 plate is often used in key components of high-temperature and high-pressure equipment, such as the shell, tube sheet and baffle of shell and tube heat exchangers in petrochemical cracking units, coal chemical gasification systems and other fields. Its excellent high-temperature creep resistance can effectively prevent equipment deformation and leakage under long-term harsh conditions.

A387 Class 2 plate, with its cost advantage and good comprehensive performance, is widely used in general industrial fields. For example, it is used to manufacture heat exchangers in food processing, pharmaceutical production and other industries, as well as pressure vessels in low-pressure steam systems. When customers consult GNEE about heat exchanger solutions, our team will recommend the most cost-effective plate type according to the actual working conditions of the customer.

When selecting A387 Class 1 or Class 2 plates, it is necessary to comprehensively consider factors such as working temperature, pressure, medium corrosion, and equipment cost.

• If the equipment needs to work in a high-temperature (above 538°C) and high-pressure environment with corrosive media, A387 Class 1 plate is the preferred choice;
• if it is a medium-temperature and medium-pressure working condition with low corrosion requirements, A387 Class 2 plate can meet the needs while reducing costs.

In addition, regardless of the type of plate used, regular maintenance is essential to extend the service life of the heat exchanger.

GNEE provides professional heat exchanger maintenance service, including regular inspection of plate corrosion, thickness detection, and heat treatment maintenance, to ensure the safe and efficient operation of the equipment.

To sum up, the core differences between A387 Class 1 and A387 Class 2 plates are reflected in chemical composition, mechanical properties and application scenarios.

As a trusted Shell and Tube Heat Exchanger supplier, GNEE has rich experience in the selection and application of these two plates. We can provide customized Heat Exchanger solutions according to your specific needs, and match the most suitable materials to balance equipment performance and cost.

If you have any questions about the selection of A387 series plates or need professional heat exchanger maintenance service, please feel free to contact us.

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GNEE Steel also supplies a variety of boilers and pressure vessel steel plates, such as A204 Grade B,A515 Grade 70,A537 Class 1,SA387 Grade 11 Class 1,P265GH,S537 Class 2,P355Q,P275N,P355N,P690Q,Q345R, etc. If you want to know more about other types of steel plates, you can call the consultation hotline at +8615824687445 or send an email to alloy@gneesteelgroup.com. You are welcome to consult us, and we are very willing to answer your questions.

What is the difference between SA 387 Grade 11 CL 1 and Class 2?

The difference between SA 387 Grade 11 Class 1 and Class 2 Plate lies in their mechanical properties. However, they both have the same chemical composition. The tensile strength and yield strength of class 2 material is higher than that of class 1, whereas the elongation for class 1 is higher compared to class 2.

What is SA 387 GR 11 Cl 2 equivalent material?

ASME SA387

Sa 387 Gr 11 Equivalent Material is the ASME SA387 in the US markets with the European Union having modules in 13CrMoSi5-5 grade. The Sa 387 Gr 11 Cl 2 Equivalent Material is the SA387-11-2 of the ASME and ASTM standard.

What is a A387 steel equivalent to?

Other designations that are equivalent to AISI A387 grade 22-PVQ alloy steel include the following: ASTM A182 (F22-1) ASTM A199 (T22) ASTM A200 (T22)

What is ASTM A387 material?

The ASTM A387 specification is the Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum plates used in the application of welded boilers and pressure vessels subjected to elevated temperatures. The two grades SSAB produces are available as Class 1 and/or Class 2.