AISI 440C Stainless Steel Precision Balls
These AISI 440C stainless steel balls provide excellent hardness and corrosion resistance. They are ideal for use in bearings, valves, and precision instruments.
Technical Specifications
Product Overview
AISI 440C Stainless Steel Precision Balls
These martensitic stainless steel balls are engineered for high-performance applications, offering remarkable hardness, superior wear resistance, and exceptional surface finishing. Manufactured to narrow dimensional tolerances, they are supplied in a passivated state. Their durability and precision make them an ideal choice for critical components in medical instruments, precision bearings, and specialized valve systems.
Technical Specifications
Service Temperature
0 ºC
Min Temp
400 ºC
Max Temp
- Available Sizes
- 0.5mm - 50.8mm
- Grade Range
- G5 to G1000
- Hardness
- 61.5 HRC
Material Composition
Chemical Composition (%)
| Element | Max/Range |
|---|---|
| Carbon (C) | 0.95-1.20 |
| Silicon (Si) | 1.00 max |
| Manganese (Mn) | 1.00 max |
| Phosphorus (P) | 0.040 max |
| Sulfur (S) | 0.030 max |
| Chromium (Cr) | 16.00-18.00 |
| Molybdenum (Mo) | 0.75 max |
Material Properties
Physical & Mechanical Properties
- Density: 7.75 g/cm³
- Young's Modulus: 210 GPa
- Specific Heat: 450 J/kg-K
- Thermal Conductivity: 19.6 W/(m·K)
Applications
- Primary Applications
- Precision BearingsAnti-friction BearingsSpecial ValvesMedical InstrumentsFoodstuff EquipmentBallpoint PensConveyor Systems
Standards
International Standards Equivalents
| Region | Designation |
|---|---|
| USA | 440C |
| Germany | 1.4125 |
| France | Z100CD17 |
| Russia | 95X18 |
| China | 9Cr18Mo |
| Japan | SUS440C |
