440C contains approximately 1% carbon and can be quenched to achieve high hardness and wear resistance while retaining the corrosion resistance of stainless steel.
440C is a high-hardness grade of stainless steel, a high-carbon martensitic stainless steel. After quenching, its hardness can reach over HRC58, with excellent wear resistance. It is suitable for bearing, valve and tool parts.
440C contains approximately 1% carbon and can be quenched to achieve high hardness and wear resistance while retaining the corrosion resistance of stainless steel. It is a classic material for instruments, bearings and cutting tools.
The 440C grade is often used in the following fields and scenarios. Our CNC machining services can provide customized parts for these industries.
The 440C demonstrates the following core advantages in CNC machining and terminal applications.
The following are the key process points when processing 440C grade to ensure the quality of parts and processing efficiency.
High-toughness cemented carbide coated cutting tools (AlTiN/TiCN) are selected, and the cutting edges are strengthened to resist the work hardening of austenitic stainless steel.
Medium and low cutting speeds, large feed rates, and the depth of cut must exceed the hardened layer to prevent the tool from rotating and rubbing against the hardened layer.
A large flow of coolant directly scour the cutting zone, powerfully expelling heat and chips, and inhibiting work hardening and thermal deformation.
Use soft claws or custom fixtures to prevent surface scratches; The slender shaft parts are used in conjunction with the tool rest to control the tool deflection.
CMM full-size inspection of key fit dimensions; Re-inspection should be conducted after post-treatment such as passivation and electrolytic polishing.
Besides 440C, Stainless Steel offers several other grades with different characteristics. Click to view details.
Send your STEP / DWG / PDF drawing and get a detailed quote with free DFM analysis and process recommendations within 2 hours. No minimum order — from 1 piece.
