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440C
Stainless 440C Product Guide
Applications | Specifications | Mechanical and Chemical Data | Tolerances
Overview
High strength, moderate corrosion resistant, good hardness and wear resistant material. After heat treatment, Stainless 440C is capable of attaining the highest strength, hardness and wear resistance of all the stainless alloys. Typically used in rolling element bearing, valve seats, high-quality knife blades, surgical instruments, chisels, gage blocks, cutlery, ball bearings and races, molds and dies, knives, valve components, measuring instruments.
Common Trade Names
UNS S44004, AISI 440C, Alloy 440C, Premar 440C, martensitic stainless steel
Other Resources
Safety Data Sheet | Weight Calculator | Mill Test Reports
Products
Purchase Ball 440C | Rectangle Bar 440C | Round Bar 440C | Square Bar 440C
Applications
- Rolling Element Bearings
- Valve Seats/Components
- Knife Blades
- Surgical Instruments
- Chisels
- Gage Blocks
- Cutlery
- Ball Bearings
- Molds
- Dies
- Measuring Instruments
Stainless 440C Specifications
ASTM | AMS |
|---|---|
| A480 | 5630 |
| Physical Properties 440C | |||||
| | |||||
|---|---|---|---|---|---|
| Density | 0.282 lb/in3 | ||||
| Ultimate Tensile Strength | 100 ksi | ||||
| Yield Tensile Strength | 65 ksi | ||||
| Shear Modulus | 11,000 ksi | ||||
| Shear Strength | 63 ksi | ||||
| Fatigue Strength | 38 ksi | ||||
| Hardness Rockwell | Brinell | B99 | 233 | ||||
| Elongation at Break Percentage | 14% | ||||
| Modulus of Elasticity | 28,000 ksi | ||||
| Poisson's Ratio | 0.28 | ||||
| Machinability Percentage | 40% | ||||
| Melting Point | 2,500-2,700 °F | ||||
| Specific Heat | 1.2 x 10^-1 BTU/lb-°F | ||||
| Thermal Conductivity | 156 BTU-in/hr-ft^2-°F | ||||
| Electrical Conductivity | 2.4% IACS | ||||
|
Chemistry Information
|
|
Element |
Percentage |
| Fe | 80.75 |
| C | 1.05 max |
| Mn | 0.4 max |
| Si | 0.4 max |
| Mo | 0.4 max |
| Cr | 17 max |
