ASTM A387 grade 9 welded steel pipe/tube
ASTM A387 grade 9 specification covers chromium-molybdenum alloy steel plates intended primarily for welded boilers and pressure vessels designed for elevated temperature service.
ASTM A387 grade 9 material chemical composition
| Element | Carbon | Manganese | Phosphorus,max | Sulfur,max | Silicon | chromium | Molybdenum | |||||||
| Grade 9 | Heat analysis | Product analysis | Heat analysis | Product analysis | Heat analysis | Product analysis | Heat analysis | Product analysis | Heat analysis | Product analysis | Heat analysis | Product analysis | Heat analysis | Product analysis |
| 0.15max | 0.15max | 0.30-0.60 | 0.25-0.66 | 0.030 | 0.030 | 0.030 | 0.030 | 1.00max | 1.05max | 8.00-10.00 | 7.90-10.10 | 0.90-1.10 | 0.85-1.15 | |
A387 grade 9 welded pipe/tube dimension
ERW; outer diameter:21.3-660mm thickness:6-25mm
LSAW; outer diameter:325-1524mm thickness:6-50mm
SSAW: outer diameter:219-3200mm thickness:5-25mm
ASTM A387 grade 9 welded steel pipe/tube mechanical properties
| Tensile strength,ksi[mpa] | Yield strength,min,ksi[mpa] | Elongation in 8 in[200mm],min,% | Elongation in 2 in[50mm],min,% | Reduction of area,min,% | |
| Grade 9 | 75-100 | 45[310] | -- | 18 | 45 |
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