Mn: ≤ 1.00
Si: ≤ 0.50
Cr: 4.75/5.50
P: ≤ 0.025
S: ≤ 0.020
Mo: 0.90/1.40
V: 0.15/0.50
Feature
1, air quenching tool steel hardened with a deep space of performance,
2, high wear-resistant line, micro-deformation, high hardenability, high compressive strength,
3, Cr12 steel carbide distribution more uniform.
Heat treatment
Slow cooling annealing :1,800-850oC 2 spheroidizing
Air-cooled quenching :940-960oC
Tempering :180-220oC cooled HRc = 60-64 510-520oC cooled HRc = 57-60
Physical properties
SKD12 steel are shown in Table 2-4-2 critical temperature, density 7.84t/m3; quality and specific heat cp is 460.55J / (kg · K); elastic modulus 203000MPa.
