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Cold drawing refers to the process of elongating metal using a cold drawing machine without heating. The advantage is that it does not require high temperatures; the disadvantage is that it results in significant residual stress and cannot be drawn to excessive lengths. Cold drawing improves toughness and tensile strength, yielding superior mechanical properties.

Cold-drawn (rolled) seamless steel pipe production process: Round tube blank → Heating → Piercing → Heading → Annealing → Pickling → Oiling (copper plating) → multi-pass cold drawing (cold rolling) → tube blank → heat treatment → straightening → hydrostatic testing (non-destructive testing) → marking → warehousing.

Difference between cold drawing and cold pulling: Cold drawing and cold pulling are two distinct methods of metal cold working; they are not the same concept. Cold drawing refers to a method in which tensile force is applied to both ends of a metal material to cause tensile deformation; Cold drawing refers to a method in which a pulling force is applied to one end of the material, causing it to be drawn through a die hole, where the die’s aperture is slightly smaller than the material’s diameter. Cold drawing causes the material to undergo not only tensile deformation but also compressive deformation, and is typically performed on specialized cold drawing machines. Materials processed by cold drawing generally exhibit better performance than those processed by cold drawing.