Alleima® 5R10 and Alleima® 2R25 are austenitic chromium-nickel stainless steels. Alleima® 2R25 is a low carbon version of Alleima® 5R10. The grades are characterized by:
- Good corrosion resistance
- Excellent toughness
- Good welding characteristics
Standards
- ASTM: 304, 304L
- UNS: S30400, S30403
- EN Number: 1.4301, 1.4306
- EN Name: X5CrNi18-10, X2CrNi19-11
- W.Nr.: 1.4301, 1.4306
- DIN: X5 CrNi 18 10, X2 CrNi 19 11
- SS: 2332, 2352
- AFNOR: Z6 CN 18 09, Z3 CN 18 10
- BS: 304S31
Product standards
- ASTM F899
- ISO 16061
Applications
These grades are mainly used for surgical instruments and dental tools.
Chemical composition (nominal) %
| C | Si | Mn | Cr | Ni | |
|---|---|---|---|---|---|
| Alleima® 5R10 | ≤0.07 | ≤0.75 | ≤2.0 | 18.5 | 9 |
| Alleima® 2R25 | ≤0.03 | ≤0.7 | ≤1.5 | 18.5 | 10 |
Forms of supply
Wire form
- In coils with weights up to 150 kg
- On various types of spool with wire weights up to 500 kg
- In straightened lengths up to 4 m
| Surface finish | Size range, mm |
|---|---|
| Coated | 0.20 - 8.00 |
| Bright | 0.11 - 0.80 |
| Mechanically polished | 0.40 - 6.00 |
Mechanical properties
Typical mechanical properties for Alleima® 5R10 and Alleima® 2R25 at 20°C.
| Grade | Tensile strength Rm | Proof strength Rp0.2 | Elongation | Hardness | |
|---|---|---|---|---|---|
| MPa | MPa | % | HRB | HB | |
| Alleima® 5R10 | ≥515 | ≥205 | ≥40 | ≤92 | ≤201 |
| Alleima® 2R25 | ≥485 | ≥170 | ≥40 | ≤92 | ≤201 |
Physical properties
Typical physical properties for annealed Alleima® 5R10 and Alleima® 2R25 are given below :
| Grade | Density | Elastic Moduls | Mean Coefficient of Thermal Expansion | Thermal Conductivity | Specific Heat | Resistivity |
|---|---|---|---|---|---|---|
| g/cm3 | 103 MPa | mm/m/°C | W/m °C | J/kg °C | μΩm | |
| 0-100 °C | at 100 °C | 0-100 °C | 20 °C | |||
| Alleima® 5R10/2R25 | 8 | 193 | 17 | 16 | 500 | 0.72 |
Corrosion resistance
Excellent corrosion resistance in a wide range of atmospheric environments and various corrosive media.
Subject to pitting and crevice corrosion in warm chloride media and to stress corrosion cracking at temperatures above 60°C.
Considered resistant to potable water with up to approximately 200mg/l chlorides, at ambient temperatures, reducing to approximately 150 mg/l, at 60°C.
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