AISI 1029

General Characteristics of AISI 1029

A low- to medium-carbon alloy with good machinability, weldability, and hot or cold workability, AISI 1029 is ideal for a wide range of construction and engineering applications. With more manganese, AISI 1029 offers higher hardenabilty than the similar AISI 1025.

Chemical Composition of AISI 1029

  • Carbon: 0.25-0.31
  • Manganese 0.60-0.90
  • Phosphorus 0.040 max
  • Sulfur 0.50 max
  • Silicon (refer to limits from specific producer)
  • Iron balance

Heat Treatment of AISI 1029

    • Normalize by heating to 1625° to 1700°F (885° to 927°C) before air cooling
    • Process anneal after cold working at 1100° to 1225°F (593° to 663°C)
    • Full anneal at 1575° to 1650°F (857° to 899°C) before furnace cooling
    • Harden
      • Not carburized
      • Heat to 1550° to 1625°F (843° to 885°C)
      • Water quench
      • Temper to appropriate hardness
    • Carburized
      • Gradually cool or oil quench from carburizing temperature
      • Reheat to 1450° to 1575°F (788° to 857°C)
      • Oil quench

Applications of AISI 1029

  • Cast parts
  • Die-formed cams
  • Pins
  • Bolts
  • Trusses
  • Rods
  • Machinery, case-hardened and cold-extruded parts
  • Fire box components
  • Boilers
  • Pressure vessels
  • Press brake, spinning, and explosive forming tools
  • Sprocket and chain assemblies

Machinability of AISI 1029

  • Readily machinable in several conditions:
  • Hot-rolled
  • Normalized
  • Annealed
  • Cold-drawn
  • Quenched-and-tempered
  • Approximate 63% of B1112 machinability rating
  • Good surface finish when quenched and tempered may be compromised from tearing when hot rolled or normalized

Workability of AISI 1029

  • Hot roll or forge from 1800° to 2300°F (982° to 1260°C)
  • Intermediate annealing required for substantial cold work
  • Fully anneal when further cold work will follow extensive cold work

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