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4340 Low Alloy Steel

4340 Low Alloy Steel
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4340 Low Alloy Steel

Product catalog summary
Material Composition:
According to ASTM A276-06, the composition of 4340 Low Alloy Steel includes:
  • Carbon: 0.38-0.43%
  • Manganese: 0.60-0.80%
  • Phosphorus: Max 0.035%
  • Sulfur: Max 0.040%
  • Silicon: 0.15-0.35%
  • Nickel: 1.65-2.00%
  • Chromium: 0.70-0.90%
  • Molybdenum: 0.20-0.30%
  • Iron: Balance
Mechanical Properties:
The typical mechanical properties of 4340 Low Alloy Steel are measured under different conditions:
  • Ultimate Tensile Strength (MPa): As-sintered: 994, Heat-treated: 1689
  • 0.2% Yield Strength (MPa): As-sintered: 560, Heat-treated: 1282
  • Elongation at Break (%): As-sintered: 5.3, Heat-treated: 2.4
  • Hardness (HRC): As-sintered: 25, Heat-treated: 48.8
  • Relative Density (%): As-sintered: 94.5, Heat-treated: 94.5
Additional Notes:
  • The properties of the as-sintered material are influenced by the cooling rate during the sintering process.
  • AISI 4340 alloy steel undergoes heat treatment at 840°C (1544°F) followed by quenching under Nitrogen.
  • All tests were conducted in independent professional laboratories to verify the 'as-sintered' and composition data.
  • Microstructure images were etched and photographed at an external facility.
  • Information is subject to change without notice.
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Catalog excerpts

4340 Low Alloy Steel-1

Tritone Industrial Additive Manufacturing Material datasheet Composition - According to ASTM A276-06 — — ASSINTERED. HEAT TREATED Typical Mechanical Properties Standard ge'sintered heat treated as sintered HI300 Ultimate Tensile Strength,MPa Relative density, % * Properties of as sintered material are affected by the cooling rate of the sintering process. * AISI 4340 alloy steel is heat treated at 840°C (1544°F) followed by quenching under Nitrogen. All tests were performed in independent professional laboratories to verify ‘as-sintered’ and composition data. Microstructure images were etched and photographed at an external facility. Subject to change without

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