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 |
