What is the Difference Between ASTM and ASME?
Before we outline what these specifications cover it is important to know the difference between the two standard publishers. ASME is the American Society for Mechanical Engineers while ASTM is the American Society for Testing and Materials.
While the standards discussed in this blog post may come from different publishers they are the equivalent of each other and cover the same specifications.
What Does ASTM A387 Grade 11 Class 2 and ASME SA387 Grade 11 Class 2 Cover?
These specifications cover chrome moly steel alloy plates that are used specifically for pressure vessels and welded boilers that operate under elevated temperatures. Other applications for steel plates that come under these specifications include heat exchangers and pipework.
This grade has a nominal chromium content of 1.25% and nominal molybdenum content of 0.50%, and the high levels of chromium provide the steel with outstanding oxidation and corrosion resistance.
The class denotes the tensile strength required by a steel plate to meet this specification. ASTM A387 Grade 11 Class 2 and ASME SA387 Grade 11 Class 2 require a tensile strength of 75 to 100 ksi (515 to 690 MPA) with a minimum yield strength of 43 ksi (310 MPA).
The maximum thickness of these steel plates is only limited by the capacity of the composition to meet the mechanical property specifications required.
ASTM A387 Grade 11 Class 2 and ASME SA387 Grade 11 Class 2 from GNEE
GNEE stocks a wide range of steel plates that are ASTM A387 Grade 11 Class 2 and ASME SA387 Grade 11 Class 2 certified.
All plates are pre-tested to rigorous standards, and we can arrange third party testing if more specific testing is required.
Our steel plates are sources from steel mills in China and we are able to ship our products worldwide.
In terms of specifications, hot-rolled steel plates can be customized in terms of thickness (6mm-200mm), width (1500mm-4800mm), and length (6000mm-12000mm) according to the requirements of equipment manufacturing. Meanwhile, supporting post-processing services are provided – such as value-added services including non-destructive testing (NDT) as per drawings, heat treatment (normalizing + tempering), and surface derusting. These ensure the products can be directly adapted to the manufacturing processes of core equipment like pressure vessels and heat exchangers.
In addition, the customized A387/SA387 hot-rolled steel plates by GNEE strictly comply with ASTM international standards and ASME Boiler and Pressure Vessel Codes. Complete Material Test Certificates (MTC) and third-party inspection reports (e.g., SGS certification) can be provided to meet the compliance requirements of high-temperature and high-pressure fields such as petrochemicals, coal chemical engineering, and power energy, thereby facilitating the safe and stable operation of customers' equipment.
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FAQ
Q: What is SA 387 material?
A: 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.
Q: What is SA387 grade 11 equivalent to?
A: 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.
Q: What is the difference between SA387 Grade 11 Class 1 and Class 2?
A: 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.
Q: What is the temperature range for SA 387 GR 11?
A: In the lower end of the temperature range SA 387 Gr 11 (1150 °F min tempering temperature) , and SA 387 Gr 22 (1250 °F min tempering temperature) are used. These grades can be specified in either class 1 or 2 and can also be provided in the Normalized & Tempered or Quenched and Tempered.
Q: What is SA 387 GR 9 material?
A: SA 387 GR 9 is a chromium-molybdenum alloy steel widely used in high-temperature applications such as pressure vessels and power generation equipment and it provides excellent resistance to oxidation and creep, making it ideal for long-term service at elevated temperatures.
Q: What is the chemical composition of SA 387 GR 22?
A: 22 CL. 2 plate chemical composition includes Chromium (Cr) 2%, Molybdenum (Mo) 1%, Manganese (Mn) 0.5%, Silicon (Si) 0.5%, Phosphorus (P) 0.03%, Sulfur (S) 0.03%, and Carbon (C) 0.1%.
Q: What is the equivalent material of SA 387 GR 12?
A: Sa 387 Gr 12 Equivalent Material can be classified as Asme SA 387 for the USA, for the European Union, the equivalent grade to this material is EN 13CrMo4-5. In Germany and England, the equivalent grades are DIN 13CRM044 and BS 620B, respectively. Apart from this, the equivalent grade for France is AFNOR 36206 15CD2.
In addition to container plates like A387/SA387, we offer a wider selection of steel plates listed in the table below that meet practical requirements: high-strength low-alloy plates for heavy machinery, wear-resistant plates for material erosion resistance, weather-resistant plates for complex climates, and marine plates that comply with ship classification standards. If you have specific needs, feel free to contact us, and we'll provide professional recommendations.
| Other steel plate | ||||
| Name | Material | Specification (mm) | Tons | Remark |
| Low Alloy | Q345A, Q345B, Q345C, Q345D, Q345E, Q390, Q420, Q460C, ST52-3, S355J2+N, SS400, SA302GrC, S275NL, 35CrMo | 6 - 350 | 5788.56 | Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection |
| Pressure Vessel Plate | Q245R, Q345R, Q370R, 16MnDR, 09MnNiDR, 15CrMoR, 14Cr1MoR, 12Cr2Mo1R, SA516Gr60, SA516Gr70, SA516Gr485, SA285, SA387Gr11, SA387Gr12, SA387Gr22, P265,P295,P355GH,Q245R(R-HIC),Q345R(R-HIC) | 3 - 300 | 8650 | Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection |
| High-Strength Plate | WH785D/E,Q960D/E, Q890D/E,WH60D/E,WH70B,Q550D,Q590D,Q690D/E | 8 - 120 | 3086.352 | Quenched and tempered |
| Wear-Resistant Plate | NM360, NM400, NM450, NM500 | 6 - 150 | 3866.297 | Quenched and tempered |
| Bridge Plate | Q235qC, Q345qC, Q370qC, Q420qC, Q345qDNH, Q370qDNH, A709 - 50F - 2, A709 - 50T - 2 | 8 - 200 | 2853.621 | Hot rolling, normalized ,hot rolling controlled rolling, quenched and tempered + toughness and brittleness |
