Non-Ferrous Casting / POT
Casting Crucibles
SiC and graphite crucibles used for melting aluminum, copper, zinc and precious metals.
Technical Specifications
Key Features
- SiC crucibles: high thermal conductivity and shock resistance
- Graphite crucibles: excellent chemical resistance
- Capacity range from 1 kg to 1000 kg
- Long service life
- Low metal loss
- Fast heating and melting time
Applications
- Aluminum casting
- Copper and copper alloy melting
- Zinc melting
- Precious metal melting (gold, silver)
- Laboratory melting operations
- Die casting facilities
Dimension Table
| Property | Specification | Unit |
|---|---|---|
| Material | SiC / Grafit | - |
| Capacity | 1 - 1000 | kg |
| Max Temperature | 1400 - 1600 | °C |
| Density | 1.7 - 2.2 | g/cm³ |
| Thermal Conductivity | 15 - 45 | W/mK |
Technical Notes
- 01Gradual heating (tempering) required for first use.
- 02Avoid sudden temperature changes.
- 03Metal level should not exceed 80% of crucible capacity.
- 04Crucible surface should be regularly cleaned of slag.
- 05Service life depends on melting temperature and metal type.
Other Types
What are non-ferrous casting materials?
Non-ferrous casting materials are the melting and alloying consumables of aluminium, copper and zinc foundries. We supply two main groups: crucibles (silicon carbide SiC and clay-graphite, 1–1000 kg capacity) and aluminium master alloy tablets (AlTi5B1 grain refiner, AlSr10 modifier, AlMn20 alloying tablet).
Crucible selection and what master alloys do
Crucible choice follows the furnace type: clay-graphite crucibles stand out for thermal shock resistance in gas/fuel-fired furnaces; SiC crucibles offer higher thermal conductivity and longer life, serving a wide range including induction furnaces. The right crucible directly affects melting time and energy consumption. Master alloys control the structure of liquid aluminium: AlTi5B1 refines grain via dissolving TiB2/Al3Ti particles — a fine equiaxed grain structure reduces hot tearing and improves feeding and mechanical properties. AlSr10 modifies the eutectic silicon in Al-Si alloys from acicular to fine fibrous form, markedly raising ductility, and stays effective far longer than sodium. Alloying tablets such as AlMn20 dissolve quickly at low temperature, giving a practical route to the target chemistry. All products ship with analysis certificates.
Frequently Asked Questions
SiC vs clay-graphite crucible — what is the difference?+
SiC offers higher thermal conductivity and longer service life; clay-graphite is economical and thermal-shock resistant. Furnace type, alloy melted and melting tempo decide the choice.
What does the AlTi5B1 grain refiner do?+
It seeds liquid aluminium with TiB2/Al3Ti nuclei, producing a fine equiaxed grain structure on solidification: less hot tearing, better feeding and higher mechanical properties.
Why is the AlSr10 modifier used?+
It converts the eutectic silicon in Al-Si casting alloys from acicular to fine fibrous form, clearly improving ductility and impact strength. Strontium lasts far longer than sodium modification.
How are master alloy tablets dosed?+
Tablets are produced at a known net weight; the count per furnace is calculated from the target chemistry, they dissolve quickly at low temperature, and the result is verified by analysis.
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