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1045
- Popular medium carbon, through-hardening grade
- Higher strength than 1018
- Increased carbon allows a better depth of hardness
- Reduced forming, welding, and machining
1030
- Medium carbon grade
- Improved through hardening
- Still formable
1018
- Popular low carbon, case hardening grade
- Good machining
- Good welding and forming
1141 (11L41)
- Medium carbon, resulfurized, through-hardening grade
- Higher strength than 1018
- Increased machinability over 1045
- Lead (L) may be added for better machinability
1117 (11L17)
- Low carbon, resulfurized, case-hardening grade
- Increased sulfur and manganese
- Reduced weldability
- Lead (L) may be added for better machinability
- Very good machinability
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