What It Is:
Carbon cold rolled steel starts as hot rolled steel, but then it’s processed further at room temperature. This extra step improves surface finish, strength, and dimensional accuracy. The “carbon” indicates it’s primarily alloyed with carbon, which controls hardness and strength.
Key Features:
- Smooth Finish: It has a clean, smooth, and often shiny surface—great for visible or finished products.
- Tighter Tolerances: More precise dimensions and better flatness than hot rolled steel.
- Increased Strength: The cold rolling process increases hardness and tensile strength through strain hardening.
- More Expensive: Due to additional processing, it costs more than hot rolled steel.
Common Grades:
- 1008 / 1010: Low carbon. Very formable, great for stamping or deep drawing.
- 1018: A popular mild carbon steel with good strength and machinability.
- 1045: Medium carbon. Stronger, used in gears, axles, and shafts.
Applications:
- Appliance panels
- Furniture
- Automotive body parts
- Metal cabinets
- Precision parts
Pros:
- Better surface quality
- Higher strength and hardness
- Precise shapes and dimensions
Cons:
- Higher cost
- Less ductile than hot rolled steel
- May require annealing if too hard to form
