1.High Temperature Strength
Inconel 600 retains much higher strength at elevated temperatures compared to stainless steel.
Even at 1000–1100°C (typical forging temperatures), Inconel 600 is still substantially stronger than stainless steel at the same temperature.
This means that much higher forging loads are required to achieve the same amount of deformation.
2.Lower Thermal Conductivity
Inconel 600 has a thermal conductivity only about 1/3 to 1/4 that of stainless steel.
Heat does not spread evenly throughout the workpiece, leading to:
Hot spots
Uneven deformation
Greater risk of cracking
More careful heating and temperature control are necessary.
3.Higher Work-Hardening Rate
Inconel 600 work-hardens much more rapidly than stainless steel.
During each forging pass, the material quickly becomes harder and stronger, limiting the amount of deformation per pass.
This requires more intermediate reheats compared to stainless steel.
4.Narrower Forging Temperature Range
Stainless steel typically has a wide forging window (e.g., 900–1200°C).
Inconel 600 has a much narrower, more critical temperature range for successful forging, usually between 1050–1180°C.
Below this range, the material is too strong and prone to cracking.
Above this range, grain growth, oxidation, and incipient melting become risks.
5.Greater Susceptibility to Hot Cracking
Inconel 600 is more prone to hot shortness and intergranular cracking during forging, especially if:
Deformation is too rapid
Temperature is not uniform
The material is overheated
Stainless steel is generally more forgiving in this regard.
