Stainless steels with structural hardening
MX455
Spécifications
EU
X3CrNiCuTiNb12-9
USA
UNS:S45500
Composition
C
0.03
Ni
8.25
Cr
11.50
Cu
2.00
Ti
1.20
Nb+Ta
0.25
Applications
• Forgings MX455 steel grade is a precipitation hardening martensitic stainless steel. MX455 is a suitable material for surgical instruments submitted to heavy flexion stresses which must exhibit high tensile strength and toughness.
• MX455 structural hardening stainless steel is highly recommended instead of standard martensitic stainless steels when both corrosion resistance and toughness are needed.
Characteristics
• Precipitation hardened stainless steel.
• Excellent compromise between tensile strength, ductility and tenacity.
• Good general and pitting resistance in chloride media and resistant to decontamination processes.
• Good ability to cold forming.
• Good weldability.
Mechanical properties
| Heat treatment |
UTS (N/mm²) |
0,2% YS (N/mm²) |
A (%) |
KV (J) |
|---|---|---|---|---|
| H + R 820/850°C | 1300 | 1200 | 16 | 55 |
Key to heat treatment symbols
| Solution treated | H | Annealed | R |
|---|---|---|---|
| Thermo-mechanical treatment | TM | Quenched and tempered | T+RV |
| Sub-zero treatment | F | Solution treated and aged | H+V |