Caldie
Caldie is a matrix tool steel manufactured by Uddeholms AB for cold work applications with high demands on chipping / cracking resistance and compressive strength. Uddeholm Caldie is a robust tool steel and is suitable for medium production volume tooling for blanking and forming difficult production materials such as advanced high strength steel.
International standards comparison chart[1]
| Grade name | AISI (USA) | BS4659 (GB) | W.-Nr. (Germany) | SS (Sweden) | JIS (Japan) |
|---|---|---|---|---|---|
| Caldie | - | - | - | - | - |
Chemical composition
| Grade name | C | Si | Mn | Cr | Mo | Ni | V | S |
|---|---|---|---|---|---|---|---|---|
| Caldie | 0.7 | 0.2 | 0.5 | 5.0 | 2.3 | - | 0.5 | - |
Properties[2]
Uddeholm Caldie is a chromium-molybdenumvanadium alloyed tool steel which is characterized by:
- Very good chipping and cracking resistance
- Good wear resistance
- High hardness (>60 HRC) after high temperature tempering
- Good dimensional stability in heat treatment and in service
- Excellent through-hardening properties
- Good machinability and grindability
- Excellent polishability
- Good surface treatment properties
- Good resistance to tempering back
- Very good WEDM properties
Application areas
Uddeholm Caldie is suitable for short to medium run tooling where chipping and/or cracking are the predominant failure mechanisms and where a high compressive strength (hardness of over 60 HRC) is necessary. This makes Uddeholm Caldie very suitable for severe cold work applications where the combination of a hardness above 60 HRC and a high cracking resistance is of utmost importance e.g. as in the blanking and forming of ultra high strength steel sheets. Uddeholm Caldie is also very suitable as a substrate steel for applications where surface coatings are desirable or necessary.
Cold Work applications
- Blanking applications where high ductility and toughness are needed to prevent chipping/cracking
- Cold forging and forming operations where a high compressive strength combined with good resistance to chipping/cracking are necessary
- Machine knives
- Thread rolling dies
- Substrate for surface coatings
Engineering components and machine parts
This steel can be used in engineering applications where high compressive strength has to be combined with high ductility/toughness. Knives for fragmentation of plastics and metals and roll forming rolls are good examples
Other Uddeholm Cold Work Steels
Arne, Calmax, Rigor, Sleipner, Sverker 3, Sverker 21, Unimax, Vanadis 4 Extra, Vanadis 6, Vanadis 10, Vanadis 23, Vancron 40, UHB 11, Formax, Holdax,
References
- ↑ Pocket Book: The Uddeholm range of tooling materials, Third Edition, 03.2011
- ↑ Uddeholm Caldie, Seventh Edition, 01.2010