Materials

SHAFT MATERIAL

All N80 grade steel or better, Yield Strength = 80 ksi (minimum)

HELIX BLADES

ASTM A572 Grade 50, Yield Strength = 50 ksi (minimum), Helix blade geometry in accordance with ICC-ES AC358

HELIX PLATE WELDMENT

Fillet Weld per ANSI/AWS D1.1, Welding Process: GMAW (Pulse arc), Electrode: ER70s-6 0.045 diameter, Gas: 90% Argon, 10% CO2

BOX CONNECTION

AISI 4125M; Q&T to HRC 28-32, Yield Strength = 107 ksi (minimum)

PIN CONNECTION

AISI C4140; Q&T to HRC 28-32, Yield Strength = 107 ksi (minimum)

TUBE/CONNECTION WELDMENT

Inertia Friction Weld per ANSI/AWS C6.1, Full Strength Metallurgical Bond

COUPLING BOLTS

ASTM A325 4” x 0.75" dia. bolt and nut, Yield Strength = 92 ksi (minimum)

ANCHOR FINISH

Available plain or hot-dip galvanized coating per ASTM A123

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