Use and characteristics
Usage: 1.2379 is a high-carbon high-chromium alloy tool steel, heat treatment has a high hardness and wear resistance, hardenability and a strong and good dimensional stability, suitable for making high-precision long-life cold-working die and thermoset molding plastic mold.
Features:
● pure steel vacuum degassing refining process.
● ball softening annealing treatment, a good cutting performance.
● strengthen the elements vanadium, molybdenum special by adding, extremely excellent wear resistance. [1]
Use
Uses:
  ● thin plate thickness is less than 2MM, efficient blanking die, punching die and pressure die set.
● a variety of scissors, inlaid blade, woodworking blade.
● thread rolling die and wear slider.
● cold heading dies, thermosetting resin molding.
● deep drawing molding, extrusion dies. [2]
Heat treatment specifications
Cryogenic treatment: In order to obtain the highest hardness and dimensional stability, immediately after quenching the mold in the deep cold -70 to -80 ℃, remain 3-4 hours, and then tempered by the cryogenic treatment of tool or mold hardness than conventional heat treatment hardness 1-3HRC. Complex shape and size changes in the larger parts, cryogenic treatment has produced the danger of cracking or mold parts after nitriding nitriding, the surface layer with high hardness and corrosion resistance of the hardened layer of a certain organization. [3]



Chemical composition
Chemical Composition: C: 1.55 Si Si: 0.35 Manganese Mn: 0.4 Chromium Cr: 12.00 Mo Mo: 0.95 V V: 1.0 [4] mechanical properties: round ball annealing to hardness ≤ 235HB ball flat steel annealing to hardness ≤ 235HB