Seamless medium carbon steel boiler and superheater tubes.
Chemical Properties:
| Carbon: 0.35 | Silicon: 0.10 |
| Manganese: 0.29-1.06 | Nickel: n/a |
| Potassium: 0.035 | Chromium: n/a |
| Sulfur: 0.035 | Molybdenum: n/a |
Mechanical Properties:
Tensile Strength:
ksi: 70
MPa: 483
Yield:
ksi: 40
MPa: 276
Elongation in 2in. or 50mm, min. %: 30
Max. Hardness Rockwell B: 89