Measure Hardness

Description


Measure Hardness
  Hardness (dph) Rockwell (15T) Tensile (PSI)
 Annealed 50–90 65–71 40,000
1/4-hard 91–100 72–78 40,000
1/2-hard 101–115  79–82 60,000
3/4-hard 116–130 83–85 70,000
Full-hard 131–150 86–88 75,000
Spring hard 175–195 89–93 90,000