ASTM A387 Plates
This specification covers chromium-molybdenum alloy steel plates for welded broilers and pressure vessels designed for elevated temperature service. Materials considered under this specification are available in grades 2, 12, 11, 22, 22L, 21, 21L, 5, 9 and 91. The steel materials shall be killed and shall be thermally treated. The steel specimens shall undergo heat analysis and product analysis and shall conform to the chemical requirements for carbon, manganese, phosphorus, sulfur, silicon, chromium, molybdenum, nickel, vanadium, columbium, boron, nitrogen, aluminum, titanium, and zirconium. The steel specimens shall also undergo tension tests and shall conform to the required values of tensile strength, yield strength, and elongation.
| Specifications |
: |
ASTM A387 / ASME SA387 |
| Thickness |
: |
5mm-150mm |
| Width |
: |
1000mm-4500mm |
| Length |
: |
3000mm -18000mm |
| Hardness |
: |
As per ASME A & NACE MR 175 |
| Impact Tested |
: |
Impact tested -52° C |
| Finish |
: |
Hot rolled plate (HR), Cold rolled sheet (CR) |
Chemical Requirements
| Element |
|
Chemical Composition (%) |
|
|
SA 387 Grade 5 |
| Carbon: |
Heat Analysis: |
0.15 max |
|
Product Analysis: |
0.15 max |
| Manganese: |
Heat Analysis: |
0.30 - 0.60 |
|
Product Analysis: |
0.25 - 0.66 |
| Phosphorus: |
Heat Analysis: |
0.035 |
|
Product Analysis: |
0.035 |
| Sulphur (max): |
Heat Analysis: |
0.030 |
|
Product Analysis: |
0.030 |
| Silicon: |
Heat Analysis: |
0.50 max |
|
Product Analysis: |
0.55 max |
| Chromium: |
Heat Analysis: |
4.00 - 6.00 |
|
Product Analysis: |
3.90 - 6.10 |
| Molybdenum: |
Heat Analysis: |
0.45 - 0.65 |
|
Product Analysis: |
0.40 - 0.70 |
The carbon content for plates over 5 in. (125 mm) in thickness is 0.17 max on product
analysis.
Mechanical Composition
| Tensile Strength |
Yield Strength |
Elongation in 50mm (%) |
Reduction of area in % |
| 75-100 ksi, 515-690 MPa |
45 Ksi, 310 MPa |
18 |
45 |
