440C vs 410: Martensitic Stainless Steels Face-Off

 

How do their chemical compositions differ?​

440C has 16-18% chromium, 0.95-1.2% carbon, and 0.5-1% molybdenum. 410 has 11.5-13.5% chromium and 0.15% carbon, with no molybdenum.​

 

Which offers higher hardness?​

440C achieves 58-60 HRC after heat treatment, much harder than 410 (up to 40 HRC). This makes 440C ideal for cutting tools needing sharp edges.​

 

How do they resist corrosion?​

440C has better corrosion resistance than 410 due to higher chromium and molybdenum. Both lag behind austenitic steels but work in dry, low-moisture settings.​

 

What are their machining considerations?​

440C is harder to machine than 410, requiring sharp tools and slow speeds. 410 is more manageable, though still less ductile than austenitic alloys.​

 

Where are they typically used?​

440C makes knife blades, bearings, and valve seats. 410 is used in pumps, valves, and automotive parts where moderate strength suffices.