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Elmet Technologies
SAE J2477 AD 1600 Automotive Austempered Ductile Iron
Categories: Metal; Ferrous Metal; Cast Iron; Alloy Cast Iron; Ductile Iron

Material Notes: Austempered Ductile Iron (ADI) is produced by heat-treating Ductile (Nodular) Iron using the austempering Process, (as exemplified in A.5), a specialized, isothermal heat treatment. When compared to conventional ductile iron, ADI can have over twice the strength for a given level of ductility. ADI can have fatigue strength comparable to that of cast and forged steels and that strength can be greatly enhanced by subsequent grinding, fillet rolling or shot peening. Although the first commercial application of ADI did not occur until 1972, the material has found applications in virtually every industrial market segment. Its principal attribute is its ability to replace steel forgings, castings and weldments at equal or lesser weight and at a reduced cost. It is also typically much less costly than aluminum and, with its high strength-to-weight ratio it has replaced cast aluminum parts at equal weight in some automotive applications.

The ausferrite matrix in ADI undergoes a strain transformation hardening when exposed to a high normal force. That effect makes machining of ADI challenging, but knowledge of this effect allows the machinist to adjust the feeds, speeds and tool angles to adequately compensate. This same strain transformation hardening is what gives ADI wear resistance better than its bulk hardness would indicate.

Other attributes of the material include, good noise dampening, fracture toughness and low temperature properties, and reasonable stiffness.

Applications
AD1600 is used where high yield and contact strength, and/or improved wear resistance are required.

Information provided by Applied Process Inc.

Key Words: ADI; SAE J2477
Vendors:
Available Properties
  • Density, Typical value of ductile iron
  • Hardness, Brinell
  • Tensile Strength at Break
  • Tensile Strength, Yield
  • Elongation at Break
  • Modulus of Elasticity, ASTM E111
  • Charpy Impact, Unnotched, ASTM E23
  • Aluminum, Al
  • Antimony, Sb
  • Arsenic, As
  • Bismuth, Bi
  • Boron, B
  • Cadmium, Cd
  • Carbon, C
  • Chromium, Cr
  • Copper, Cu, as needed
  • Iron, Fe, balance
  • Lead, Pb
  • Magnesium, Mg
  • Manganese, Mn
  • Molybdenum, Mo, as needed
  • Nickel, Ni, as needed
  • Oxygen, O
  • Phosphorus, P
  • Selenium, Se
  • Silicon, Si
  • Sulfur, S
  • Tellurium, Te
  • Tin, Sn
  • Titanium, Ti
  • Vanadium, V
  
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