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ASTM A387 Gr 11 CL1 steel and A387 Gr 11 CL2 steel are pressure vessel grade steel for use in elevated temperature service. ASTM A387 Gr 11 CL1 steel and A387 Gr 11 CL2 steel are used in a variety of industries such as the oil, gas and petrochemical industry, where liquids and gases are often stored at higher temperatures.
Chemical Composition of ASTM A387 Gr 11 CL1 steel and A387 Gr 11 CL2 steel:
| Grade | C | Si | Mn | P | S | Cr | Mo |
| A387 Gr 11 | 0.04-0.17 max | 0.44-0.86 max | 0.35-0.73 max | 0.035 max | 0.035 max | 0.94-2.56 max | 0.40-0.70 max |
Mechanical properties of ASTM A387 Gr 11 CL1 steel and A387 Gr 11 CL2 steel:
| Grade | Mechanical Requirements | Hardness | |||||
| Tensile Strength Apa (ksi) min | Yield Strength Mpa (ksi)min | Elongation min% | Brinel max HB | Rockwell max HRB | |||
| A387 Gr 11 | Class 1 | Class 2 | Class1 | Class2 | Class1/2 | Class1/2 | Class1/2 |
| 415-585 | 515-690 | 240 | 310 | 22 | 217 | 95 | |
ASTM A387 Gr 11 CL1 steel and A387 Gr 11 CL2 steel are mainly used in oil, chemical, boiler, power station and other industries, for the production of reactor, separator, spherical tank, oil tank, liquefied gas tank, nuclear reactor pressure shell, heat exchanger, boiler drum, Liquefied petroleum gas cylinders, water turbines and other equipment and components.
