This specification covers the requirements for wrought seamless or welded and drawn 18chromium-14nickel-2.5molybdenum stainless steel small diameter tubing for surgical implants. Manufacturing method shall be seamless or welded and drawn process. Tubing shall conform to chemical composition, dimensions, and mechanical properties of this specification. Mechanical properties include ultimate tensile strength, yield strength, and elongation. Outside and inside diameter, wall thickness, length and straightness shall conform to the permissible limits of this specification.

1.1 This specification covers the requirements for wrought 18chromium-14nickel-2.5molybdenum stainless steel tubing used for the manufacture of surgical implants. Material shall conform to the applicable requirements of Specification F 138 (for seamless) or Specification F 139 (for welded and drawn). This specification addresses those product variables that differentiate small-diameter medical grade tubing from the bar, wire, sheet, and strip product forms covered in these specifications.

1.2 This specification applies to straight length tubing with 0.125 in. (3.15 mm) and smaller nominal outside diameter (OD) and 0.018 in. (0.46 mm) and thinner nominal wall thickness.

1.3 The values stated in inch-pound units are to be regarded as the standard. The SI units in parentheses are approximate.