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440C
440C is a high carbon-chromium, deep-hardening, martensitic stainless steel characterized by its high hardness, wear resistance, and corrosion resistance.
Melt-type(s): Air-melt, VAR
Other name(s): Bohler N695
STANDARDS
| Type | Specification |
|---|---|
| AMS | AMS 5880, AMS 5630, AMS 5618, AMS 2300, AMS-QQ-S-763 |
| ASTM | ASTM A276, ASTM F899, ASTM A756, ASTM A314, ASTM A484, ASTM A370 |
| UNS | S44004, S44000 |
| EN/DIN | X105CrMo17 |
| EN | 1.3544, 1.4125 |
SIZES AVAILABLE
| Form | Size range (in) | Size range (mm) |
|---|---|---|
| Bar | 0.125 - 8.000 | 3.18 - 203 |
| Wire | 0.138 - 0.256 | 3.51 - 6.50 |
CHEMICAL COMPOSITION
| Element | Range (%) |
|---|---|
| C | 0.95 - 1.20 |
| Cr | 16.00 - 18.00 |
| Cu | < 0.50 |
| Mn | < 1.00 |
| Mo | 0.40 - 0.65 |
| Ni | < 0.75 |
| P | < 0.04 |
| S | < 0.03 |
| Si | < 1.00 |
CHARACTERISTICS
| High temperature | Stainless | Through-hardened | Nitriding | Carburizing | Induction |
|---|---|---|---|---|---|
CHARACTERISTICS
| Characteristic | Value |
|---|---|
| High temperature | |
| Stainless | |
| Through-hardened | |
| Nitriding | |
| Carburizing | |
| Induction |
ADDITIONAL INFO
In extreme environments, components made of 440C can still corrode. For applications requiring greater corrosion resistance, grades like XD16N and XD15NW® may be considered.
MECHANICAL PROPERTY DATA
| Hardness | Ultimate Tensile Strength | 0.2% Yield Strength |
| 60 HRC (after heat treatment) | 285 KSI / 1965 MPa | 275 KSI / 1896 MPa |
Heat Treatment
Heat treatment instructions and recommendations for 440C are provided by one of our mills, Carpenter. Please contact Sullivan Steel for additional guidance or information.
Machinability
Sullivan Steel typically stocks 440C in the annealed condition, optimal for machinability and heat treatment uniformity. Exceptions may apply.
Common Applications
Cutting instruments, ball bearings, ball screws, knife blades, chisels, swords, surgical instruments.
DISCLAIMER
The product information provided on this page is provided for general reference only and is not complete. Customers and prospective customers should rely on the applicable material certifications for product information, including any exceptions to specifications, if applicable. Material certifications are available upon request. All product sales are subject to Sullivan Steel’s standard terms and conditions of sale.