AISI 303 stainless steel balls are distinguished by their austenitic composition, which offers excellent usability thanks to a high sulphur content. They are ideal for applications requiring corrosion resistance while guaranteeing a high precision finish. Marteau- Lemarie ensures a direct supply with a stock available in France for quick delivery.
Chemical composition of AISI 303 stainless steel ball
| Element | C | If | Mn | P | S | Cr | Neither |
|---|---|---|---|---|---|---|---|
| % | 0,150 max | 1.00 max | 2.00 max | 0,200 max | 0.150 min | 17,00-19,00 | 8,00-10,00 |
Physical characteristics of AISI 303 stainless steel ball
| Ownership | Value | Unit |
|---|---|---|
| Density | 7.97 | g/cm3 |
| Young Module | 198 | GPA |
| Thermal expansion coefficient | 16.7 (DT=0-100°C) | × 10−6 /°C |
| Thermal conductivity | 15.2 | W/m·K |
| Electrical resistivity | 715 | × 10 - 9 D·m |
| Specific heat | 500 | J/kg·K |
| Relative magnetic permeability | 1,020 | — |
| Magnetic behaviour | Paramagnetic | — |
Hardness and mechanical strength of AISI 303 stainless steel ball
| Ownership | Value | Unit |
|---|---|---|
| Hardness | 170-270 | HB |
| Tensile failure load | 500-1300 | MPa |
| Tensile failure load | 72-188 | psix10^3 |
| Exercise temperatures | -196/200 | ° C |
| Exercise temperatures | -320,8/392 | °F |
Available diameters and grades for AISI 303 stainless steel ball
| Parameter | Value |
|---|---|
| Minimum diameter | 0.8 mm — 1/32′′′ |
| Maximum diameter | 180 mm — 7′′ |
| Grades available | G100-200-300-500-600-700-1000 |
| Precision standards | ISO 3290-1 / DIN 5401 / AFBMA |
Corrosion resistance of AISI 303 stainless steel ball
Corrosion resistance is lower than that of AISI 302/304 steels (due to a high S content, which promotes puncture corrosion). Not suitable for use in marine environments.
International standards for AISI 303 stainless steel ball
| ITA | USA (AISI) | DIN (GER) | AFNOR (FRA) | UK | GOST (RUS) | GB (CHN) | JIS (JPN) |
|---|---|---|---|---|---|---|---|
| X8CrNiS18-9 | 303 | 1.4305 | Z 8 CNF 18-09 | 303S31 | 12CH18N10E | Y1Cr18Ni9 | SUS303 |
Applications of AISI 303 stainless steel ball
Special valves.
