What is ASTM A556?ASTM A556 is a Specification for Seamless Cold-Drawn Carbon Steel Feedwater Heater Tubes.
ScopeThis specification covers minimum-wall-thickness, seamless cold-drawn carbon steel tubes including bending into the form of U-tubes, if specified, for use in tubular feedwater heaters.
Ok let's start with ASTM A556 chemical composition.
Mn0.27 - 0.63
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Now it's the mechanical properties turn:
Grade A226 ksi (180 MPa) min.
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Grade A247 ksi (320 MPa) min.
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Elongation (min.) 50 mm0.35.
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Reduction of Area (min. %)Not Required.
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Grade A272 HRB max
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Density7800 - 8000 kg/m3 (around 7.9 g/cm3 or 0.285 lb/in3).
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Elastic Modulus190 GPa (27557 ksi) - 210GPa (30458 ksi).
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Poisson's Ratio0.27 – 0.30.
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Allowable StressDepends on the project (And its factor of safety).
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