1018 Cold Rolled Carbon Steel - The most commonly available grade when it comes to Cold Rolled Steel. It is easily formed, machined, and fabricated. These bars have a higher tensile and yield strength compared to hot rolled bars. 1018 is a low carbon steel with good case hardening qualities and used for jigs, machining and templates.
4140 steel is used across many industrial fields that require strength and versatility. It is often used in varying applications in the aerospace, automotive, and agriculture industries.
4340 Steel is known, amongst other things, for its toughness. It is used primarily for structural applications but is also known to be used in the manufacturing of structural parts.