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Steel, Nitriding, Bars, Forgings, and Tubing 1.1Cr - 3.5Ni - 0.25Mo - 1.2Al (0.21 - 0.26C)
Steel Bars, Forgings, and Tubing 1.7Cr - 3.8Ni - 0.3Mo (0.32 - 0.38C) Aircraft-Quality
Steel Bars and Forgings 1.8Ni - 0.25Mo (0.38 – 0.43C) (4640) Heat Treated, 125 ksi (862 MPa) Tensile Strength
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