ASME SA 387 GRADE 91 Class 2
Where resistance to high temperature and good anti-corrosion characteristics are required, ASME
SA387 Grade 91 Class 2 carbon alloy steel plate is a material to consider. It is a pressure vessel grade
steel which is used commonly by fabricators who supply the oil and gas industry.
Due to the materials excellent corrosion resistant properties, SA387 Grade 91 is also an option for use in
sour service environments. The material has good weldability and with its heat resistant qualities, the
material is a highly versatile steel which can be used in numerous applications.
| 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 |
