ASTM A387 Grade 9 Class 2
A387 Grade 9 Class 2 – chrome–molybdenum plate is an ideal material for welded pressure vessels and boilers used in elevated temperature service. With excellent resistance to high temperature and corrosion, this type of steel is commonly used in the petrochemical, oil, gas and power generation industry.
All plates come with mill test certification and individual stamping. Third party testing can be arranged at the customers request.
Chromium & Molybdenum content (according to the ASTM specification):
| Designation | Nominal Chromium Content (%) | Nominal Molybdenum Content (%) |
|---|---|---|
| A387 Grade 5 | 9.00% | 1.00% |
Tensile Requirements for Class 2 Plates:
| Designation | Requirement | Grade 9 |
|---|---|---|
| A387 Grade 9 | Tensile strength, ksi [MPA] | 75 to 100 [515 to 690] |
| Yield strength, min, ksi [MPa]/(0.2% offset) | 45 [310] | |
| Elongation in 8 in. [200mm], min % | ||
| Elongation in 2 in. [50mm], min, % | 18 | |
| Reduction of area, min % | 45 (measured on round specimen) 40 (measured on flat specimen) |
Chemical Requirements:
| Carbon (C) | % |
| Heat Analysis: Product Analysis: | 0.15 max 0.15 max |
| Manganese (Mn) | % |
| Heat Analysis: Product Analysis: | 0.30 - 0.60 0.25 - 0.66 |
| Phosphorus (P) | % |
| Heat Analysis: Product Analysis: | 0.030 0.030 |
| Sulphur (S) (Max) | % |
| Heat Analysis: Product Analysis: | 0.030 0.030 |
| Silicon (Si) | % |
| Heat Analysis: Product Analysis: | 1.00 max 1.05 max |
| Chromium (Cr) | % |
| Heat Analysis: Product Analysis: | 8.00 - 10.00 7.90 - 10.10 |
| Molybdenum (Mo) | % |
| Heat Analysis: Product Analysis: | 0.90 - 1.10 0.85 - 1.15 |
| Vanadium (Vn) | % |
| Heat Analysis: Product Analysis: | 0.04 max 0.05 max |