BioDur® 108
Carpenter Technology · #S29108 · source
BioDur® 108 is an essentially nickel-free austenitic stainless alloy that contains a high nitrogen content to maintain its austenitic structure. As a result, BioDur® 108 stainless has improved levels of tensile and fatigue strength, as compared to nickel-containing alloys such as 316L (ASTM F138), 22Cr-13Ni-5Mn (ASTM F1314), and 734 (ASTM F1586). The resistance of BioDur® 108 to pitting and crevice corrosion is superior to 316L and equivalent to 22Cr-13Ni-5Mn and 734. BioDur® 108 is produced by the electro-slag remelting (ESR) process to ensure its microstructural integrity and cleanness. The alloy is non-magnetic and essentially free of ferrite phase.
The chemistry of BioDur® 108 meets the recently implemented EU MDR regulatory labeling threshold of less than 0.10% cobalt by weight. Devices made from this alloy should not need to be labeled as containing a potential CMR (carcinogenic, mutagenic, and reprotoxin) element.
Type Analysis
- Carbon (Maximum) 0.080
- Phosphorus (Maximum) 0.030
- Silicon (Maximum) 0.75
- Nickel (Maximum) .010*
- Manganese (Nominal) 21.00-24.00
- Sulfur (Maximum) 0.010
- Chromium (Nominal) 19.00-23.00
- Molybdenum (Nominal) 0.50-1.50
- Iron (Nominal) Balance
- Copper (Maximum) 0.25
- Nitrogen (Nominal) 0.90
*0.050 max nickel available upon request.
Product Information
| Manufacturer | Carpenter Technology |
|---|---|
| Alloy Type | Austenitic stainless |
| Uns Number | S29108 |
| Ferrite Phase | Essentially free |
| Nickel Content | Essentially nickel-free |
| Available Forms | Bar, Rounds, Billet, Strip, Wire, Rod |
| Nitrogen Content | High nitrogen content |
| Magnetic Properties | Non-magnetic |
| Manufacturing Process | Electro-slag remelting (ESR) |
| Regulatory Compliance | EU MDR (less than 0.10% cobalt) |
| Applicable Specifications | AMS 2630, ASTM F2229 |
