M30NW Austenitic stainless steels
Spécifications
- EU
X4CrNiMoN21-9-4
Typical composition
- C
?0,06
- Ni
9,5
- Cr
21
- Mo
2,2
- Mn
4
- N
0,4
Applications
• Production of permanent surgical implants and devices for osteosynthesis.
Mechanical properties
• Austenitic stainless steel with excellent corrosion resistance combined with good mechanical properties.
• Rigorous selection of the raw materials used in the steel and the use of consumable electrode remelting guarantee the very high quality required for the production of surgical implants.
• Due to its composition and the absence of ferrite, this steel is totally non?magnetic and has very good resistance to pitting and crevice corrosion in a physiological medium (Cr % + 3.3Mo % + 15N % > 32).
• Niobium stabilisation results in excellent resistance to intercrystalline corrosion.
• The combination of the melting and processing methods ensures that a homogeneous, finegrained material with a very low level of inclusions is obtained. This results in excellent fatigue resistance which is ideal for the production of parts subject to high stresses.
Mechanical features
| Heat treatment | UTS (N/mm²) | A (%) |
|---|---|---|
| H | 860 | 40 |
- Solution treated : H
Annealed : R - Thermo-mechanical treatment : TM
Quenched and tempered : T+RV - Sub-zero treatment : F
Solution treated and aged : T+RV