5Cr21Mn9Ni4N non-magnetic die steel is low nickel austenitic non-magnetic stainless die steel and internal combustion engine valve steel. The steel has high hardness (>60HRC), excellent wear resistance, low permeability (<0.01H/m), good toughness and excellent corrosion resistance at 700℃ temperature, is the ideal material for making magnetic mold, product chemical composition is stable, superior performance, long service life, no rust. Applied by dozens of magnetic material factories, it is a special magnetic-free die steel that replaces 7Mn15, 70Mn, 50Mn and so on.

Chemical composition of magnetic die steel 5Cr21

Steel number European number CsicrNINPSMn5Cr21OS-5Cr2108.48 ~0.58≤ 0.3520.0 ~ 22.03.25 ~ 4.50.35 ~0.5≤ 0.04 ≤ 0.038.0 ~10.0

Mechanical properties

Conditional yield strength: 580MPa

Tensile strength: 950MPa

Elongation: 8%

Section shrinkage rate: 10%

Hardness ≥302HBS

Heat treatment specifications:

Specification for solution treatment and aging

Solution temperature 1100~1200℃, water cooling, hardness of about 30HRC, aging temperature (730±780)°C, hardness increased from 30HRC after solution treatment to about 35HRC.