Austenitic stainless steels
M25W
Spécifications
EU
X2CrNiMo18-14-3
USA
UNS: S31673
ISO Symbol
X2CrNiMo18-14-3
ISO Num
1.4435
ASTM std
F138
F139
F139
Composition
C
< 0.03
Ni
14
Cr
18
Mo
3
Applications
• Manufacturing of orthopaedic implants, hip prosthesis, endomedulary nails, spine systems, rods and screws.
Characteristics
• M25W is an austenitic stainless steel produced by consumable electrode remelting.
• The composition of M25W is designed to provide a high quality structure with no delta ferrite and a sulphur content less than 0.003 %.
• Furthermore it should be also noted that it has an extremely low inclusion content due to rigorous selection of raw materials and the melting method used.
• M25W can be hardened by cold working up to 1000 MPa for standard section and 1400 MPa for small diameter and wire.
Mechanical properties
| Heat treatment |
UTS (N/mm²) |
0,2% YS (N/mm²) |
A (%) |
KCU (J/cm²) |
|---|---|---|---|---|
| H | 540 | 210 | 60 | 250 |
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 |