Zinkberatung e.V. – 1981 Grade G‑ZnAl8Cu1: Superior Casting Alloy
The material ZnAl8Cu1, a fine zinc block metal alloy acc. to ASTMB 669, german marking ZA 8, is the best alloy for casting with continuous form. It has the smallest strength, but best surface treatment characteristics opposite the marks ZnAl12Cu1 and ZnAl27Cu2. The alloy is outstanding pressure-tight, even in thin cross sections, excellently machinably and on high polish sharpening and polishingable. The alloy is used mainly for sand and ingot casting, in addition, for die casting on cold chamber machines. The alloy ZA 8 exhibits a clearly improved creep rupture behaviour in relation to the alloy Z 430 (G-ZnAl4Cu3).
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 20.0 °C | 6.3 g/cm³ |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | 20.0 °C | 85 GPa | |
Elongation A50 | 20.0 °C | 1 - 2 % | |
Hardness, Brinell | 20.0 °C | 85 - 90 [-] | |
Poisson's ratio | 23.0 °C | 0.3 [-] | Typical for Zinc Aluminium |
Tensile strength | 20.0 °C | 220 - 275 MPa | |
Yield strength Rp0.2 | 20.0 °C | 190 - 200 MPa |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 23.0 °C | 2.2E-5 - 2.8E-5 1/K | Typical for Zinc Aluminium |
Melting point | 375 - 485 °C | Typical for Zinc Aluminium | |
Specific heat capacity | 23.0 °C | 393 - 525 J/(kg·K) | Typical for Zinc Aluminium |
Thermal conductivity | 23.0 °C | 105 - 125 W/(m·K) | Typical for Zinc Aluminium |
Chemical properties
| Property | Value |
|---|---|
Aluminium | 8 - 8.8 % |
Cadmium | 3E-3 % |
Copper | 0.8 - 1.3 % |
Iron | 0.1 % |
Lead | 4E-3 % |
Magnesium | 0.02 - 0.03 % |
Tin | 2E-3 % |
Zinc | 89.76 % |
Technological properties
| Property | ||
|---|---|---|
| Processing methods | permanent mould casting | |
Metal
- EN 13835: GGG‑NiMn 23/4 Cast Iron – High‑Strain, Cryogenic‑Grade Material
- EN 13835 GGL‑NiCr 30/3: High‑Temperature, Corrosion‑Resistant Cast Iron for Pumps, Boilers, and Turbochargers
- Zinc Beratung e.V. 1981 – G‑ZnAl12Cu1 Casting Properties & Applications
- Zinkberatung e.V. 1981: Grade G‑ZnAl27Cu2 Cast Alloy Specification
- High-Performance ZnAl27Cu2 Alloy – Grade G, Heat Treated for 120 °C Applications
- EN 12844 Grade G‑ZnAl4Cu3: Advanced Casting Alloy for High‑Strength Applications
- EN 12844: Grade G‑ZnAl6Cu1 Casting Specifications & Performance
- EN 1561 GJL-150: Comprehensive Cast Condition Specifications
- EN 1561 Grade GJL-200: Standard Cast Condition for High-Performance Applications
- EN 1561 Grade GJL-250 Cast – Key Properties & Applications