Definition
Steel that has been shaped and finished by passing it between rollers at room temperature, after it has already been hot-rolled and cooled. The cold-rolling process produces a smoother surface, tighter dimensional tolerances, and increased strength and hardness compared to hot-rolled steel.
Plain English
Steel that is squeezed into its final size and shape while cold rather than red-hot. This gives it a cleaner surface, more exact dimensions, and makes it harder and stronger.
Context Anchor
Seen in aircraft maintenance and fabrication when a material list, repair instruction, or parts drawing specifies what kind of steel to use.
Derivation
‘Cold-rolled’ describes the process literally: the steel is rolled (squeezed between heavy rollers) while cold, not glowing hot. The name tells you exactly what was done to it and why its properties differ from hot-rolled steel.
Why Pilots Care
Aircraft hardware and structural parts often specify a particular steel process because strength, hardness, and dimensional accuracy directly affect safety. Substituting the wrong type of steel during a repair can compromise the part.
Intuition Check
Cold-rolled steel is not steel that has been chilled for use. Here, “cold” means the shaping was done after the steel cooled, which affects its size, finish, and strength.
Example Sentence 1
The bracket was machined from cold-rolled steel to hold its dimensions precisely under load.
Example Sentence 2
Repair instructions called for cold-rolled steel sheet to restore the damaged longeron without adding extra weight.