Technical Data Sheet
AISI 400C is a high carbon chromium steel is designed to provide stainless steel properties with maximum hardness.
After heat-treatment Type 440C attains the highest hardness of any stainless steel (about 60 HRC).
This stainless steel is principally used for bearing assemblies including ball bearings and should be considered for needle valves and ball check valves.
| Chemical Composition Limits | ||||||||
| Weight% | C | Si | Mn | P+S | Cr | Mo | Ni | Others |
| AISI 440C | 0.95/ 1.2 | 1.0 max | 1.0 max | 0.04 P 0.03 S |
16.0 / 18.0 | 0.75 | – | – |
| AFNOR Z100 CD 17 | 0.90/ 1.2 | 1.0 max | 1.0 max | 0.04 P 0.03 S |
16.0 / 18.0 | 0.35 / 0.75 | 0.50 max | Cu 0.50 max |
| AMS 5630 | 0.95/ 1.2 | 1.0 max | 1.0 max | 0.04 P 0.03 S |
16.0/ 18.0 | 0.4/ 0.65 | 0.75 max | Cu 0.50 max |
| WS 1.4125 M-17C Chronifer X 105 CrMo17 Z100 CD 17 |
0.95/ 1.2 | 1.0 max | 1.0 max | 0.015 S max | 16.0/ 18.0 | 0.8 max | – | – |
Typical Mechanical Properties
| Material | Condition |
Yield Strength 0.2% (MPa) | Ultimate Tensile Strength (MPa) | Elongation 2"% | Reduction of Area | Brinell Hardness |
| Alloy 440C | Hardened 1900°F, oil quench, tempered 600°F | 1896 | 1965 | 2 | 10 | 580 |
Availability
Alloy 440C is available in Bar (Flat, Hexagon, Round, Square), Wire, Billet, Rod. For all stock availability contact Sales.
Specifications
440C
440C Vac Melt
AMS 5618 Bars / wire / forging (VM)
AMS 5630 Bar, Wire, Forgings
AMS 5880 Bars / wire (bearing apps)
QQ-S-763
ASTM A276 / ASME SA276
ASTM A314 / ASME SA314
ASTM A473 / ASME SA473
ASTM A484 / ASME SA484
ASTM A493 / ASME SA493
ASTM A756 / ASME SA756
ASTM A580 / ASME SA580
AISI 440C
WS 1.4125
AFNOR Z100CD17
X105CrMo17
UNS S44004
RBO 160-064
For more information about Alloy 440c for use in medical applications, visit our medical division at https://www.cnnickel.com