Martensitic stainless steels
XDBD
XDBDW
Spécifications
Common name
440C
EU
X105CrMo17
USA
UNS: S44004
AISI: 440C
AISI: 440C
AMS
5630
5880
5618
5880
5618
AIR
Z100CD17
ISO Symbol
X105CrMo17
ISO Num
1.4125
WL
1.3544
ASTM grade
440C
ASTM std
A276, A314, F899, A473
Composition
C
1
Cr
17
Mo
0.5
Applications
• Bearings, bearing components.
• Valve seats.
• Guide collars.
• Moulds for manufacturing plastic materials.
Characteristics
• Provides a high level of hardness combined with good corrosion resistance.
• Excellent abrasion resistance.
Mechanical properties
| Heat treatment |
Hardness HRC |
|---|---|
| T + F + Rv 140°C | 59 |
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 |