These balls are made of martensitic stainless steel, with excellent hardness and increased wear resistance. Thanks to their strict dimensional tolerances and high quality finish, they are particularly suitable for applications requiring high precision. Available in France, Marteau- Lemarie guarantees technical expertise and personalized service.
Chemical composition of AISI 440C stainless steel ball
| Element | C | If | Mn | P | S | Cr | Mo |
|---|---|---|---|---|---|---|---|
| % | 0,95-1,20 | 1.00 max | 1.00 max | 0.040 max | 0.030 max | 16,00-18,00 | max. 0.75 |
Physical characteristics of AISI 440C stainless steel ball
| Ownership | Value | Unit |
|---|---|---|
| Density | 7.7 | g/cm3 |
| Young Module | 210 | GPA |
| Thermal expansion coefficient | 10.2 (DT=0-100°C) | × 10−6 /°C |
| Thermal conductivity | 19.6 | W/m·K |
| Electrical resistivity | 680 | × 10 - 9 D·m |
| Specific heat | 450 | J/kg·K |
| Relative magnetic permeability | > 700 | — |
| Magnetic behaviour | Not soaked | — |
Hardness and mechanical strength of AISI 440C stainless steel ball
| Ownership | Value | Unit |
|---|---|---|
| Hardness | 57-65 | HRC |
| Tensile failure load | 1900-2000 | MPa |
| Tensile failure load | 275-290 | psix10^3 |
| Exercise temperatures | 0/400 | ° C |
| Exercise temperatures | 32/752 | °F |
Available diameters and grades for AISI 440C stainless steel ball
| Parameter | Value |
|---|---|
| Minimum diameter | 0.3 mm — 1/64′′ |
| Maximum diameter | 300 mm — 12′′ |
| Grades available | See International Standards |
| Precision standards | ISO 3290-1 / DIN 5401 / AFBMA |
Corrosion resistance of AISI 440C stainless steel ball
Remarkable corrosion resistance in contact with fresh water, aqueous steam, oil, gasoline, alcohol. Stitch corrosion in marine environments. Low corrosion resistance in acidic environments.
International standards for AISI 440C stainless steel ball
| ITA | USA (AISI) | DIN (GER) | AFNOR (FRA) | UK | GOST (RUS) | GB (CHN) | JIS (JPN) |
|---|---|---|---|---|---|---|---|
| X 105CrMo17 | 440C | 1.4125 | Z100CD17 | – | 95X18 | 9Cr18MB | SUS440C |
Applications of AISI 440C stainless steel ball
Stainless steel/anti-friction/special precision ball bearings, special valves/for petroleum refineries, conveyor belts/rolls, ball pens. Used in the food industry, instruments for medical applications, quick connections, ball sockets, fixing mechanisms.
