What is the difference between a387 Grade 11 Class 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.
| ASTM A387 / ASME SA387 | A387 Grade 5 | A387 Grade 9 | A387 Grade 11 | A387 Grade 12 | A387 Grade 22 | |||||
| Class 1 | Class 2 | Class 1 | Class 2 | Class 1 | Class 2 | Class 1 | Class 2 | Class 1 | Class 2 | |
| Tensile Strength (ksi) | 60-85 | 75-100 | 60-85 | 75-100 | 60-85 | 70-90 | 50-80 | 65-85 | 60-85 | 75-100 |
| Tensile Strength (MPa) | 415-585 | 515-690 | 415-585 | 515-690 | 415-585 | 485-620 | 380-550 | 450-585 | 415-585 | 515-690 |
| Yield Strength (ksi) | 30 | 45 | 30 | 45 | 35 | 45 | 33 | 40 | 30 | 45 |
| Yield Strength (MPa) | 205 | 310 | 205 | 310 | 240 | 310 | 230 | 275 | 205 | 310 |
| Elongation in 200mm (%) | – | – | – | – | 19 | 18 | 18 | 19 | – | – |
| Elongation in 50mm (%) | 18 | 18 | 18 | 18 | 22 | 22 | 22 | 22 | 18 | 18 |
| Reduction of area in (%) | 45 | 45 | 45 | 45 | – | – | – | – | 45 | 45 |
What is SA387 grade 22?
What is SA 387 Grade 22? ASME SA387-22 steel plate is a pressure vessel grade steel specially designed for use in elevated temperature service and applications in which sour gas is present.
What is the chemical composition of ASTM A387 Grade 12?
ASTM A387 GR 12 CL 2 Plates is designed with chemical components such as silicon, chromium, vanadium, molybdenum, sulfur, phosphorus, carbon, and manganese. Alloy Gr 12 has some tensile requirements, such as tensile strength, area reduction, elongation, and yield strength.
What is the difference between Class 1 and Class 2 SA387/A387 Plate ?
Here is the information if you looking for the Difference Between Class 1 and Class 2 Plates in ASTM A387 / ASME SA387 Grade 5, Grade 9, Grade 11, Grade 12, Grade 22 Plates etc.
The Chemical Composition remains the same in both Class 1 and Class 2 (Cl1 and Cl2) but the only Difference is in the Mechanical Properties which is mentioned in below Table.
