ASTM A515 / A515M
This specification covers carbon-silicon steel plates primarily for intermediate- and higher-temperature service in welded boilers and other pressure vessels.Plates under this specification are available in three grades having different strength levels.The maximum thickness of plates is limited only by the capacity of the composition to meet the specified mechanical property requirements; however, current practice normally limits the maximum thickness of plates furnished under the specification.
| Grades | Description |
|---|---|
| Grade 60 [Grade 415] | - |
| Grade 65 [Grade 450] | - |
| Grade 70 [Grade 485] | - |
Chemical Properties
| Grade | Carbon | Manganese | Phosphorus,max | Sulfur,max | Silicon | ||||
|---|---|---|---|---|---|---|---|---|---|
| 1 in. [25 mm] and under | Over 1 to 2 in. [25 to 50 mm], incl | Over 2 to 4 in. [50 to 100 mm], incl | Over 4 to 8 in. [100 to 200 mm], incl | Over 8 in. [200 mm] | |||||
| Grade 60 [Grade 415] | 0.24 | 0.27 | 0.29 | 0.31 | 0.31 | 0.98 | 0.025 | 0.025 | 0.13–0.45 |
| Grade 65 [Grade 450] | 0.28 | 0.31 | 0.33 | 0.33 | 0.33 | 0.98 | 0.025 | 0.025 | 0.13–0.45 |
| Grade 70 [Grade 485] | 0.31 | 0.33 | 0.35 | 0.35 | 0.35 | 1.30 | 0.025 | 0.025 | 0.13–0.45 |
Note: A Applies to both heat and product analyses.
B For each reduction of 0.01 percentage point below the specified maximum for carbon, an increase of 0.06 percentage point above the specified maximum for manganese is permitted, up to a maximum of 1.50 % by heat analysis and 1.60 % by product analysis.
Mechanical Properties
| Grades |
Tensile strength,min: ksi [MPa] |
Yield strength,min: ksi [MPa] |
Elongation in 8 in. [200 mm] min, %A | Elongation in 2 in. [50 mm] min, %A |
|---|---|---|---|---|
| Grade 60 [415] | 60–80 [415–550] | 32 [220] | 21 | 25 |
| Grade 65 [450] | 65–85 [450–585] | 35 [240] | 19 | 23 |
| Grade 70 [485] | 70–90 [485–620] | 38 [260] | 17 | 21 |
