1084 is nearly identical to 1080 resulting in it being one of the easiest steels to work and heat treat with a variety of equipment but also having slightly increased edge holding. This combination makes it one of the best choices for beginners to expert bladesmiths.
Recommended Working Sequence For 1084
Forging: to 2150 °F (1175 °C). Do not forge below 1500 °F (815 °C)
Normalizing:
Heat to 1600 °F (870 °C). Cool in still air. Annealing:
Heat to 1500 °F (815 °C). Furnace cool to 1200 °F (650 °C) at a rate not exceeding 50 °F (28 °C) per
hour.
Grinding or Machining Hardening: Austenitize- Heat to 1500 °F (815 °C). Quench in water or brine. Oil quench sections under 1/4 in. (6.35 mm) thick Tempering: As-quenched hardness of approximately 65 HRC. Hardness can be adjusted downward by proper
tempering
Polish I-T / TTT diagram for
1084: The following tempering guidelines apply to 1084 that has been
hardened to industrial standards. Knifemakers using other methods will have to
adjust the resulting hardness numbers downward for the same temperatures. Tempering
Temperature Rockwell Hardness oC oF HRC 149 300 65 177 350 63-64 204 400 60-61 232 450 57-58 260 500 55-56 288 550 53-54 316 600 52-53 343 650 50 *The above information is based
upon personal experience and testing along with data from ASM International, Carpenter Steel and
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