ASTM A268 / A268M Grade TPXM - 27

Chemical Properties

Carbon	Manganese	Phosphorus	Sulfur	Silicon	Nickel	Chromium	Molybdenum	Copper	Nitrogen	Columbium

Note A: For small diameter or thin walls, or both, tubing, where many drawing passes are required, a carbon maximum of 0.015 % is necessary. Small outside diameter tubes are defined as those less than 0.500 in. [12.7 mm] Note D: Nickel plus copper.

Mechanical Properties

Tensile Strength, min, ksi [MPa]	Yield Strength, min, ksi [MPa]	Elongation,A,B in 2 in. or 50 mm, min, %

Note A: For tubing smaller than 1/₂ in. [12.7 mm] in outside diameter, the elongation values given for strip specimens in table shall apply. Mechanical property requirements do not apply to tubing smaller than 1/₈ in. [3.2 mm] in outside diameter or with walls thinner than 0.015 in. [0.4 mm] Note B: For longitudinal strip tests a deduction of 0.90 % for TP446–1 and S 44735 and 1.00 % for all other grades shall be made from the basic minimum elongation for each 1/₃₂ in. [0.8 mm] decrease in wall thickness below 5/₁₆ in. [8 mm]. The following table gives the computed minimum values

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