JDB-4 is made of casting iron HT250 and embedded with solid lubricant. It is a typical cost saving product. It can be substitute of JDB-2 if requirement in mechanical performance is not High including guide post of mould, mold-frame of plastic injection m
| Grade | JDB500#-4 | |
| Material | ZCuAl9Fe4Ni4Mn2+graphite | |
| Density g/cm2 | 8.0 | |
| Hardness HB | >210 | |
| Tensile st rength N/mm2 | >750 | |
| Yeild strength N/mm2 | >450 | |
| Elongation % | >12 | |
| Coefficient of linea『expansion 10-5/°C | — | |
| Heat-conducting Coefficient W(/m.k) | — | |
| Flexibility Coefficient KN/mm2 | — | |
| Temp. Limits °C | — | |
| Max. Dynamic Load N/mm2 | — | |
| Max.speed m/s | Dry Lubrication | — |
| Oil Lubrication | — | |
| Max.PV N/mm2 · m/s | Dry Lubrication | 1.2 |
| Oil Lubrication | — | |
| Frictionμ | Dry Lubrication | — |
| Oil Lubrication | <0.16 | |
It is suitable for mold guide column, injection molding machine mold base and other fields.