A387 Grade 11 Class1 Cr.Mo Alloy Steel Plate
A387 Grade 11 Class 1 is a chromium-molybdenum alloy steel plate, mainly used for welded boilers and pressure vessels in high temperature service. Molybdenum in A387 Grade 11 Class 1 boiler steel plate has the effect of fine grain strengthening and improving tempering stability, and chromium has the effect of solid solution strengthening and improving the corrosion resistance of steel.
A387 Grade 11 Class1 vessel plate chemical composition
| Property | Value | Condition | Related Standards | Shape |
|---|---|---|---|---|
|
Carbon |
0.05 - 0.17 % |
Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered |
ASTM A387 |
Plate |
|
Chromium |
1 - 1.5 % |
Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered |
ASTM A387 |
Plate |
|
Manganese |
0.4 - 0.65 % |
Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered |
ASTM A387 |
Plate |
|
Molybdenum |
0.45 - 0.65 % |
Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered |
ASTM A387 |
Plate |
|
Phosphorus |
0.025 % |
Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered |
ASTM A387 |
Plate |
|
Silicon |
0.5 - 0.8 % |
Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered |
ASTM A387 |
Plate |
|
Sulfur |
0.025 % |
Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered |
ASTM A387 |
Plate |
A387 Grade 11 Class1 boiler plate mechanical property
| Property | Value | Condition | Related Standards | Shape | Comment |
|---|---|---|---|---|---|
|
Elastic modulus |
200 - 215 GPa |
Typical for Nickel Molybdenum Steel |
|||
|
Elongation |
18.5 % |
Predicted Value, A80 |
|||
|
19 % |
Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered |
ASTM A387 |
Plate |
A200 |
|
|
19.2 % |
Predicted Value, Transverse |
||||
|
19.7 % |
Predicted Value, A80 Transverse |
||||
|
22 % |
Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered |
ASTM A387 |
Plate |
A50 |
|
|
25.9 % |
Predicted Value |
||||
|
Poisson's ratio |
0.29 [-] |
Typical for Nickel Molybdenum Steel |
|||
|
Reduction of area |
41.5 % |
Predicted Value |
|||
|
44.3 % |
Predicted Value, Transverse |
||||
|
Shear modulus |
79.4 GPa |
Predicted Value |
|||
|
Shear strength |
607.8 MPa |
Predicted Value |
|||
|
Tensile strength |
415 - 585 MPa |
Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered |
ASTM A387 |
Plate |
|
|
Yield strength |
240 MPa |
Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered |
ASTM A387 |
Plate |
|
|
261.3 MPa |
Predicted Value, RP1 |
||||
|
317.1 MPa |
Predicted Value, RP1 Transverse |
||||
|
324.6 MPa |
Predicted Value, RP05 |
||||
|
330.9 MPa |
Predicted Value, Transverse |
||||
|
347.6 MPa |
Predicted Value, RP02 |
||||
|
437.5 MPa |
Predicted Value, RP002 |
||||
|
469.7 MPa |
Predicted Value, RP02 Transverse |
A387 Grade 11 Class1 boiler plate thermal property
| Property | Value | Comment |
|---|---|---|
|
Coefficient of thermal expansion |
9e-06 - 1.3e-05 1/K |
Typical for Nickel Molybdenum Steel |
|
Melting point |
1382 - 1529 °C |
Typical for Nickel Molybdenum Steel |
|
Specific heat capacity |
335 - 481 J/(kg·K) |
Typical for Nickel Molybdenum Steel |
|
Thermal conductivity |
44 W/(m·K) |
Typical for Nickel Molybdenum Steel |
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