Alloys We Die Cast
Aluminum, Yellow Brass, Red Brass, and other Special Brass Alloys
Rheocast specializes in cold chamber aluminum die casting and brass die casting. Aluminum and brass alloys produce highly repeatable, complex shapes and at very competitive prices. Each alloy category offers its own unique benefits. High-pressure die castings offer many advantages over other manufacturing processes. Die cast components are stronger, lighter in weight and require less machining than fabricated parts. Complex and intricate shapes can be die-cast in a single homogenous piece which eliminates assemblies and welding.
Rheocast Brass Die Cast Alloys
Nominal Chemical Composition by Percent
Note: Metallurgical Details in the chart below are for informational purposes only. Authoritative details can be found in CDA Link Column
*Additional Alloys Available Upon Request
| CDA Brass | Additional Info | CDA Link | Cu | Sn | Pb | Zn | Fe | Ni | Al | Si | Sb | Mn | S | P |
| Yellow Brass | ||||||||||||||
| C85700 | info | C85700 | 58-64 | 0.50-1.50 | 0.80-1.50 | 32-40 | 0-.70 | 0-1.0 | 0-.080 | 0-.05 | ||||
| C85800 | info | C85800 | 57 min | 0-1.50 | 0-1.50 | 31-41 | 0-.50 | 0-.50 | 0-.55 | 0-.25 | 0-.05 | 0-.25 | 0-.05 | 0-.01 |
| Red Brass | ||||||||||||||
| C87800 | info | C87800 | 80 min | 0-.25 | 0-.09 | 12.0 -16.0 | 0-.15 | 0-.20 | 0-.15 | 3.8-4.2 | 0-.05 | 0-.15 | 0-.05 | 0-.01 |
| Special Brass | C99750 | 55-61 | .50-2.50 | 17-23 | 0-1.0 | 0-5.0 | .25-3.0 | 17-23 | ||||||
| C99750 | info |
Rheocast A380 Aluminum Die Cast Alloy
Nominal Chemical Composition by Percent
Note: Metallurgical Details in the chart below are for informational purposes only.
*Additional Alloys Available Upon Request
| Elements | Al | Si | Fe | Cu | Mn | Mg | Cr | Ni | Zn | Sn | Ti | Trace |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| %Min | – | 7.50 | – | 3.00 | – | – | – | – | – | – | – | – |
| %Max | – | 9.50 | 1.00 | 4.00 | .50 | .30 | – | .50 | 2.90 | 3.50 | – | 0.50 |
| %Norm | Balance | 8.50 | – | 3.50 | – | – | – | – | – | – | – | – |
| Specific Gravity | 2.71 |
| Density | 0.098 lb/in3 at 68°F |
| Melting Point – Solidus | 1,000°F |
| Melting Point – Liquidus | 1,100°F |
| Electrical Conductivity | 23% IACS at 68°F |
| Thermal Conductivity | 55.6 Btu/ft/(hr/ft2/°F) at 68°F |
| Coefficient of Thermal Expansion | 12.1 x 10-6 per °F (68°F – 572°F) |
| Specific Heat Capacity | 0.23 Btu/lb/°F at 68°F |
| As Sand Cast | Temp | Tensile Strength | Yield Strength | El % | Brinell Hardness | Fatigue Strength | Shear Strength | Young’s Modulus |
|---|---|---|---|---|---|---|---|---|
| °F/°C | Ksi/MPa | 500/10mm/Ball | PSI x 106/GPa | |||||
| S-Max | 77 | – | – | – | – | – | – | – |
| S-Max | 25 | 330 | 165 | – | – | – | – | 80 |
| S-Min | 77 | – | – | 3.0 | – | – | – | – |
| S-Min | 25 | – | – | 3.0 | – | – | – | 70 |
| Typical | 77 | 47 | 23 | 3.5 | 80 | 20 | 27 | 10.3 |
| Typical | 25 | 320 | 160 | 3.5 | 80 | 140 | 190 | 71 |
| Joining Technique | Suitability |
|---|---|
| Resistance to Hot Cracking | 2 |
| Pressure Tightness | 2 |
| Die-filling Capacity | 2 |
| Anti-soldering to Die | 1 |
| Corrosion Resistance | 4 |
| Machining Ease and Quality | 3 |
| Polishing Ease and Quality | 3 |
| Electroplating Ease and Quality | 1 |
| Anodizing (Appearance) | 3 |
| Chemical Oxide Protective Coating | 4 |
| Strength at Elevated Temperature | 3 |