A387 Grade 12 Class 1 Steel for Boilers
ASTM A387 GR.12 CL.1 Pressure Vessel Steel Plate is a chromium-molybdenum alloy steel plate suitable for welded boilers and pressure vessels in high temperature service. The addition of molybdenum and chromium provide excellent corrosion resistance and high temperature strength respectively, making it ideal for oil and gas industry applications where liquids and gases are stored at higher temperatures.
A387 Grade 12 Class 1 PVQ Steel 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 |
0.8 - 1.15 % |
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 - 0.6 % |
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 |
0.15 - 0.4 % |
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 12 Class 1 vessel plate mechanical property
| Property | Value | Condition | Related Standards | Shape | Comment |
|---|---|---|---|---|---|
|
Elastic modulus |
200 - 215 GPa |
Typical for Chromium Molybdenum Steel |
|||
|
Elongation |
18 % |
Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered |
ASTM A387 |
Plate |
A200 |
|
19.2 % |
Predicted Value, A80 |
||||
|
19.3 % |
Predicted Value, Transverse |
||||
|
19.9 % |
Predicted Value, A80 Transverse |
||||
|
22 % |
Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered |
ASTM A387 |
Plate |
A50 |
|
|
26.2 % |
Predicted Value |
||||
|
Poisson's ratio |
0.29 [-] |
Typical for Chromium Molybdenum Steel |
|||
|
Reduction of area |
43.8 % |
Predicted Value, Transverse |
|||
|
45.1 % |
Predicted Value |
||||
|
Shear modulus |
79.3 GPa |
Predicted Value |
|||
|
Shear strength |
606.1 MPa |
Predicted Value |
|||
|
Tensile strength |
380 - 550 MPa |
Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered |
ASTM A387 |
Plate |
|
|
Yield strength |
230 MPa |
Class 1, Annealed, Normalized and Tempered, or Quenched and Tempered |
ASTM A387 |
Plate |
|
|
260.6 MPa |
Predicted Value, RP1 |
||||
|
305.2 MPa |
Predicted Value, RP05 |
||||
|
317.1 MPa |
Predicted Value, RP1 Transverse |
||||
|
327 MPa |
Predicted Value, Transverse |
||||
|
332.6 MPa |
Predicted Value, RP02 |
||||
|
437.1 MPa |
Predicted Value, RP002 |
||||
|
469.5 MPa |
Predicted Value, RP02 Transverse |
A387 Grade 12 Class 1 boiler plate Stock list
| 12 x 2500 x 12000 | 12 x 2000 x 12000 | 14 x 2000 x 5400 | 14 x 2000 x 12000 | 14 x 2500 x 12000 |
| 8 x 2500 x 12000 | 6 x 2000 x 12000 | 10 x 2500 x 12000 | 10 x 2000 x 12000 | 10 x 2500 x 6000 |
| 25 x 2500 x 9000 | 25 x 2500 x 12000 | 32 x 2500 x 3000 | 32 x 2500 x 6000 | 36 x 2500 x 6000 |
| 16 x 2500 x 12000 | 16 x 2000 x 12000 | 20 x 2500 x 12000 | 18 x 2500 x 12000 | 22 x 2000 x 11500 |
| 40 x 2500 x 7000 | 40 x 2500 x 6000 | 90 x 2500 x 6800 | 75 x 2500 x 4100 | 90 x 1500 x 2700 |
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