Method for producing iron-base dispersion-strengthened alloy tube

A method of producing an iron-based dispersion-strengthened alloy tube, the method comprising:

• utilizing a Pilger type rolling machine having a pair of upper and lower grooved rolls and a mandrel for forming a tube by reciprocally moving the grooved rolls in an axial direction of the rolling tube in order to effect a reduction in the diameter of the rolling tube and a reduction in the wall thickness of the rolling tube,
• wherein a stroke of the grooved rolls includes a rolling region, and each of the grooved rolls include a groove surface, and the groove surfaces define a caliber;
• and
• contacting a rolling surface of the caliber with an outer circumference of the rolling tube such that a length of contact between the rolling surface of the caliber and the outer circumference of the rolling tube is at least 0.9 times a circumferential length of the rolling tube over at least the entire area of the rolling region.