Seamless ferritic and austenitic alloy steel boiler, superheater, and heat exchanger tubes.

Chemical Properties:

Carbon: 0.15 max.Silicon: 0.50 max.
Manganese: 0.30-0.60Nickel: n/a
Potassium: 0.025Chromium: 4.00-6.00
Sulfur: 0.025Molybdenum: 0.45-0.65

Mechanical Properties:

Tensile Strength:

ksi: 60

MPa: 414


ksi: 30

MPa: 207

Elongation in 2in. or 50mm, min. %: 30

Max. Hardness Rockwell B: 85

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