ASTM A387 Grade 11 Class 2 chrome moly steel plate according to ASTM A387/A387M standard is designed for use in welded boilers and pressure vessels used at elevated temperatures. The alloying elements Chromium and Molybdenum provide heat and corrosion resistance to ASTM A387 Grade 11 Class 2 chrome moly steel plate, and enable A387 Grade 11 Class 2 steel plate to be used at high temperatures.
ASTM A387 Grade 11 Class 2 chrome moly steel plate chemical composition:
| Grade | C | Si | Mn | P | S | Cr | Mo |
| A387 Grade 11 Class 2 | 0.04-0.17 | 0.44-0.86 | 0.35-0.73 | 0.035 | 0.035 | 0.94-1.56 | 0.40-0.70 |
Carbon Equivalent: Ceq = [C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15]%
ASTM A387 Grade 11 Class 2 chrome moly steel plate mechanical properties:
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | |
| Mpa (ksi) min | Mpa (ksi)min | min% | Brinel max HB | Rockwell max HRB | |
| A387 Grade 11 Class 2 | 515-690 | 310 | 22 | 217 | 95 |
ASTM A387 Grade 11 Class 2 chrome moly steel plate is for use in elevated temperature service, and typically used in a variety of industries such as oil, gas and petrochemical industry, where liquids and gases are often stored at higher temperatures.
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