1. Mick
  2. Sherlock Holmes
  3. Technical
  4. Thursday, 20 June 2019
  5.  Subscribe via email
Found some info on the heat treating stages required for making leaf springs so leaving it here for later...


  • Steps in making a leaf spring without special equipment
  • Anneal the steel strip raw material - Heat to approx 800~850°C (cherry to bright red) and allow to cool s-l-o-w-l-y in air.
  • Cut, machine and form and shape the individual leaves.
  • Test assemble the complete spring assembly.
  • When satisfied, disassemble the spring again and harden the leaves (individually). [Heat to approx 820°C (bright red) and quench in oil].
  • Clean the surface with steel wool or similar to see the colours clearly when tempering (next).
  • Temper the leaves. [Heat to approx 320°C (dark blue/grey) and quench in oil].
  • Clean the leaves, and paint or apply final finish if desired.
  • Assemble the spring.


There are no replies made for this post yet.
However, you are not allowed to reply to this post.