Alloy Vs Steel
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Note 1 - HB=Brinell, RW=Rockwell. Higher numbers indicate increased hardness levels.
Note 2 - Values in BTU/[(Ft.² Hr.°F)/Ft.] at 68°F - Higher numbers indicate increased thermal conductivity.
Note 3 - Alternatives to QC7 with very similar characteristics may sometimes be used.***
These specifications provide the following benefits and allow production of quality aluminium alloy mould tools and mouldings in less time and lower cost.
Comparison of Materials Used to Make Mould Tools
| Mould Tool Material | Density g/cm³ |
Hardness (see note 1) |
Thermal Conductivity (see note 2) |
Yield Strength ksi |
| QC7 aluminium alloy * | 2.833 | 167hb | 91 | 74-79 |
| standard aluminium | 2.722 | 95hb | 96 | 40-42 |
| P20 tool steel | 7.888 | 28-37rw | 20 | 130-135 |
| H13 quality tool steel | 7.777 | 52-54rw | 14.4 | 228 |
5 Reasons Aluminium Alloy Mould Tools are Better than Steel Mould Tools
- Easier to machine/polish - fast delivery lower cost and simpler modifications
- 4 x thermal conductivity of steel - better tool heat dissipation and thus, faster cycle times
- Closer to tool temp. ejection - less stress, distortion, warpage and post mould shrinkage
- Excellent consistency - we'll guarantee your tool life
- 1/3 weight of steel - reduced machine energy use and staff fatigue loading tools/inserts
