Our Products
OM alloys
OM alloys (formerly HZ alloys) wear-resistant copper alloys
Product characteristics
- High hardness, with excellent wear resistance.
- Excellent contact smoothness with a low coefficient of friction.
- Smooth, preventing catching damage from jamming and overheating.
- This allows for greater limiting drawing ratios in mold designs.
- Reduces mold creation costs and helps reduce time to delivery by eliminating heat treatment and surface treatment processes.
Applications
OM28 material
Rolls for forming: Stainless steel pipe, titanium pipe and other roll materials for forming
OM33 material
Mold materials for press-forming, such as stainless steel, titanium, high-strength copper sheeting, surface-treated copper sheeting, aluminum and more
Physical properties
| Item | OM28 material | OM33 material | |
|---|---|---|---|
| Density | 7,300 | 7,300 | kg/m3（298K） |
| Melting point | 1,252~1,298 | 1,252~1,298 | K |
| Coefficient of linear expansion | 17.4 x 10-6 | 17.4 x 10-6 | K-1（293～523K） |
| Thermal conductivity | 67 | 67 | W/m・K（298K） |
Mechanical properties
| Item | OM28 material | OM33 material | |
|---|---|---|---|
| Tensile strength | ＞390 | ＞441 | MPa |
| Extensibility | ＜0.5 | ＜0.5 | ％ |
| Hardness | 270~300 | 310~340 | HB（3000kgf） |
| Impact Value | 3~5 | 3~7 | J |
| Compression resistance | 1,180~1,270 | 1,370~1,470 | MPa |
Machinability
High hardness for a copper alloy, with excellent smoothness resulting in an alloy that resists machining.
We use ultra-hard machining tools for this alloy. (Usage classification code: JIS K10)
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