17-4PH uses precipitation hardening to adjust strength and toughness, while 440C uses quenching and tempering to achieve high hardness and wear resistance. Sintered powder-metal parts also require consideration of density and carbon and oxygen condition.
Interpret the relationships between variables, not a single parameter
Compares the performance tuning logic for 17-4PH precipitation hardening and 440C quenching and tempering.
17-4PH: Pay attention to the aging status
The properties of 17-4PH are related to solution/aging state. When selecting, it should be clear whether you are pursuing higher strength, hardness, or a balance of toughness and corrosion resistance.
440C: Focus on hardening and tempering
The high hardness of 440C is closely related to the heat treatment route, which requires balancing toughness, deformation, surface processing and corrosion resistance requirements.
Do not directly apply the properties of forged materials
The porosity, density, chemical state and manufacturing history of powder sintered parts differ from that of forged materials, and final performance should be evaluated on customer parts or agreed test conditions.
Discuss your powder project
Share the process step, operating conditions and part result you want to improve.
- Current material, powder or part issue
- Process step and observed symptom
- Available particle-size, composition, dimensional or performance data
- Equipment, process conditions and desired outcome
Technical references for this page
These references explain materials, processes or test methods. Third-party product data does not represent Tongcheng product specifications.