![](\"http:\/\/www.dam-dev.co.uk\/development\/wp-content\/uploads\/2026\/03\/Elektron\u00ae-RZ5ZE41A-mobile-1.jpg\" "\\"Elektron\u00ae")
<\/span><\/div><\/div><\/div><\/div><\/div>Elektron\u00ae RZ5\/ZE41A<\/h1><\/div>Elektron\u00ae RZ5\/ZE41A sand casting ingot \u2013 A magnesium casting alloy containing zinc, rare earths and zirconium.<\/p>\n<\/div>
Product information<\/span><\/i><\/a><\/div>Downloads and Support<\/span><\/i><\/a><\/div><\/div><\/div><\/div><\/div>Product information<\/h2><\/div><\/div><\/div>Speak to a Mg Alloy expert<\/span><\/i><\/a><\/div><\/div><\/div><\/div><\/div>Used in the T5 condition, this high strength magnesium alloy is ideal for high integrity castings operating at ambient temperatures of up to 150\u02daC.<\/p>\n
In addition to displaying excellent casting characteristics, the alloy is both pressure tight and weldable.<\/p>\n<\/div>
<\/div><\/div><\/div><\/div><\/i><\/i><\/span>Applications<\/span><\/a><\/h4><\/div>\nThe versatility of this alloy makes it of interest to a wide range of designers dealing with aerospace, automotive, military and electronic applications. Castings in Elektron RZ5\/ZE41A are found in a wide range of applications including:<\/p>\n
\n- Helicopter gearboxes<\/li>\n
- Performance car components<\/li>\n
- Military equipment<\/li>\n
- Aircraft engines<\/li>\n
- Power tools<\/li>\n
- Aircraft components<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Specifications<\/span><\/a><\/h4><\/div>\n\n- ASTM B80 ZE41A-T5 AMS 4439<\/li>\n
- MIL-M-46062<\/li>\n
- UNS M16410<\/li>\n
- MMPDS BS 2L.128<\/li>\n
- BS2970 MAG5-TE AIR 3380 RZ5<\/li>\n
- AFNOR G-Z4TR DIN 1729 3.5101<\/li>\n
- Aircraft Number 3.6104 UNAVIA 816-02 EN 1753<\/li>\n
- EN MB 35110<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Chemical composition<\/span><\/a><\/h4><\/div>\n\n- Zinc:<\/strong> 3.5\u20135.0%<\/li>\n
- Rare earths:<\/strong> 0.8\u20131.7%<\/li>\n
- Zirconium:<\/strong> 0.4\u20131.0%<\/li>\n
- Magnesium:<\/strong> Balance<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Heat treatment<\/span><\/a><\/h4><\/div>Optimum properties are achieved in the T5 condition after 2 hours at 330\u02daC followed by 10\u201316 hours at 170\u2013180\u02daC. Satisfactory properties may be obtained from 1\u20136 hours at 325\u2013360\u02daC. Water quenching is not required.<\/div><\/div><\/div><\/i><\/i><\/span>Physical properties<\/span><\/a><\/h4><\/div>\n\n- Specific gravity:<\/strong> 1.84<\/li>\n
- Coefficient of thermal expansion:<\/strong> 27.1x 10-6K-1<\/li>\n
- Thermal conductivity:<\/strong> 109 Wm-1K-1<\/li>\n
- Specific heat:<\/strong> 960 Jkg-1K-1<\/li>\n
- Electrical resistivity:<\/strong> 68 n\u03a9m<\/li>\n
- Modulus of elasticity:<\/strong> 44.1 GPa<\/li>\n
- Poissons ratio:<\/strong> 0.35<\/li>\n
- Melting range:<\/strong> 510\u2013640\u02daC<\/li>\n
- Damping index:<\/strong> 1.0<\/li>\n
- Brinell hardness:<\/strong> 55\u201370<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div>
<\/i><\/i><\/span>Design data<\/span><\/a><\/h4><\/div>\n\n- Minimum specification tensile properties<\/li>\n
- BS 2L.128<\/li>\n
- 0.2% proof stress:<\/strong> 135 MPa<\/li>\n
- Tensile strength:<\/strong> 200 MPa<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Other properties<\/span><\/a><\/h4><\/div>\nCastability<\/strong><\/p>\nCastings will contain minimal microporosity and the tendency to hot cracking is low. Castings are pressure tight and may be welded.<\/p>\n
Pattern makers shrinkage factor<\/strong><\/p>\n1.3%<\/p>\n
Weldability<\/strong><\/p>\nWeldable by the tungsten arc inert gas process (TIG) with a filler rod of a similar composition. Castings should be heat treated after welding.<\/p>\n
Machining<\/strong><\/p>\nElektron RZ5 castings, like all magnesium alloy castings, machine faster than any other metal. Providing the geometry of the part allows, the limiting factor is the power and speed of the machine rather than the quality of the tool material. The power required per cubic centimetre of metal removed varies from 9 to 14 watts per minute depending on the operation.<\/p>\n
Surface treatment<\/strong><\/p>\nAll the normal chromating, anodising and finishing treatments are applicable.<\/p>\n
Corrosion resistance<\/strong><\/p>\n\n- ASTM B117 Salt spray test<\/li>\n
- Corrosion rate: 4\u20136mg\/cm2\/day<\/li>\n
- 320\u2013480mpy<\/li>\n<\/ul>\n
Low temperature properties<\/strong><\/p>\n\n- Mechanical properties at -196\u02daC:<\/li>\n
- Elongation: 0.5%<\/li>\n
- Ultimate tensile strength: 245MPa<\/li>\n
- Impact value (unnotched): 0.7j<\/li>\n<\/ul>\n<\/div><\/div><\/div>
Elektron\u00ae RZ5\/ZE41A sand casting ingot \u2013 A magnesium casting alloy containing zinc, rare earths and zirconium.<\/p>\n<\/div>
Product information<\/h2><\/div><\/div><\/div>Speak to a Mg Alloy expert<\/span><\/i><\/a><\/div><\/div><\/div><\/div><\/div>Used in the T5 condition, this high strength magnesium alloy is ideal for high integrity castings operating at ambient temperatures of up to 150\u02daC.<\/p>\n
In addition to displaying excellent casting characteristics, the alloy is both pressure tight and weldable.<\/p>\n<\/div>
<\/div><\/div><\/div><\/div><\/i><\/i><\/span>Applications<\/span><\/a><\/h4><\/div>\nThe versatility of this alloy makes it of interest to a wide range of designers dealing with aerospace, automotive, military and electronic applications. Castings in Elektron RZ5\/ZE41A are found in a wide range of applications including:<\/p>\n
\n- Helicopter gearboxes<\/li>\n
- Performance car components<\/li>\n
- Military equipment<\/li>\n
- Aircraft engines<\/li>\n
- Power tools<\/li>\n
- Aircraft components<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Specifications<\/span><\/a><\/h4><\/div>\n\n- ASTM B80 ZE41A-T5 AMS 4439<\/li>\n
- MIL-M-46062<\/li>\n
- UNS M16410<\/li>\n
- MMPDS BS 2L.128<\/li>\n
- BS2970 MAG5-TE AIR 3380 RZ5<\/li>\n
- AFNOR G-Z4TR DIN 1729 3.5101<\/li>\n
- Aircraft Number 3.6104 UNAVIA 816-02 EN 1753<\/li>\n
- EN MB 35110<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Chemical composition<\/span><\/a><\/h4><\/div>\n\n- Zinc:<\/strong> 3.5\u20135.0%<\/li>\n
- Rare earths:<\/strong> 0.8\u20131.7%<\/li>\n
- Zirconium:<\/strong> 0.4\u20131.0%<\/li>\n
- Magnesium:<\/strong> Balance<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Heat treatment<\/span><\/a><\/h4><\/div>Optimum properties are achieved in the T5 condition after 2 hours at 330\u02daC followed by 10\u201316 hours at 170\u2013180\u02daC. Satisfactory properties may be obtained from 1\u20136 hours at 325\u2013360\u02daC. Water quenching is not required.<\/div><\/div><\/div><\/i><\/i><\/span>Physical properties<\/span><\/a><\/h4><\/div>\n\n- Specific gravity:<\/strong> 1.84<\/li>\n
- Coefficient of thermal expansion:<\/strong> 27.1x 10-6K-1<\/li>\n
- Thermal conductivity:<\/strong> 109 Wm-1K-1<\/li>\n
- Specific heat:<\/strong> 960 Jkg-1K-1<\/li>\n
- Electrical resistivity:<\/strong> 68 n\u03a9m<\/li>\n
- Modulus of elasticity:<\/strong> 44.1 GPa<\/li>\n
- Poissons ratio:<\/strong> 0.35<\/li>\n
- Melting range:<\/strong> 510\u2013640\u02daC<\/li>\n
- Damping index:<\/strong> 1.0<\/li>\n
- Brinell hardness:<\/strong> 55\u201370<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div>
<\/i><\/i><\/span>Design data<\/span><\/a><\/h4><\/div>\n\n- Minimum specification tensile properties<\/li>\n
- BS 2L.128<\/li>\n
- 0.2% proof stress:<\/strong> 135 MPa<\/li>\n
- Tensile strength:<\/strong> 200 MPa<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Other properties<\/span><\/a><\/h4><\/div>\nCastability<\/strong><\/p>\nCastings will contain minimal microporosity and the tendency to hot cracking is low. Castings are pressure tight and may be welded.<\/p>\n
Pattern makers shrinkage factor<\/strong><\/p>\n1.3%<\/p>\n
Weldability<\/strong><\/p>\nWeldable by the tungsten arc inert gas process (TIG) with a filler rod of a similar composition. Castings should be heat treated after welding.<\/p>\n
Machining<\/strong><\/p>\nElektron RZ5 castings, like all magnesium alloy castings, machine faster than any other metal. Providing the geometry of the part allows, the limiting factor is the power and speed of the machine rather than the quality of the tool material. The power required per cubic centimetre of metal removed varies from 9 to 14 watts per minute depending on the operation.<\/p>\n
Surface treatment<\/strong><\/p>\nAll the normal chromating, anodising and finishing treatments are applicable.<\/p>\n
Corrosion resistance<\/strong><\/p>\n\n- ASTM B117 Salt spray test<\/li>\n
- Corrosion rate: 4\u20136mg\/cm2\/day<\/li>\n
- 320\u2013480mpy<\/li>\n<\/ul>\n
Low temperature properties<\/strong><\/p>\n\n- Mechanical properties at -196\u02daC:<\/li>\n
- Elongation: 0.5%<\/li>\n
- Ultimate tensile strength: 245MPa<\/li>\n
- Impact value (unnotched): 0.7j<\/li>\n<\/ul>\n<\/div><\/div><\/div>
Used in the T5 condition, this high strength magnesium alloy is ideal for high integrity castings operating at ambient temperatures of up to 150\u02daC.<\/p>\n
In addition to displaying excellent casting characteristics, the alloy is both pressure tight and weldable.<\/p>\n<\/div>
<\/i><\/i><\/span>Applications<\/span><\/a><\/h4><\/div>\nThe versatility of this alloy makes it of interest to a wide range of designers dealing with aerospace, automotive, military and electronic applications. Castings in Elektron RZ5\/ZE41A are found in a wide range of applications including:<\/p>\n
\n- Helicopter gearboxes<\/li>\n
- Performance car components<\/li>\n
- Military equipment<\/li>\n
- Aircraft engines<\/li>\n
- Power tools<\/li>\n
- Aircraft components<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Specifications<\/span><\/a><\/h4><\/div>\n\n- ASTM B80 ZE41A-T5 AMS 4439<\/li>\n
- MIL-M-46062<\/li>\n
- UNS M16410<\/li>\n
- MMPDS BS 2L.128<\/li>\n
- BS2970 MAG5-TE AIR 3380 RZ5<\/li>\n
- AFNOR G-Z4TR DIN 1729 3.5101<\/li>\n
- Aircraft Number 3.6104 UNAVIA 816-02 EN 1753<\/li>\n
- EN MB 35110<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Chemical composition<\/span><\/a><\/h4><\/div>\n\n- Zinc:<\/strong> 3.5\u20135.0%<\/li>\n
- Rare earths:<\/strong> 0.8\u20131.7%<\/li>\n
- Zirconium:<\/strong> 0.4\u20131.0%<\/li>\n
- Magnesium:<\/strong> Balance<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Heat treatment<\/span><\/a><\/h4><\/div>Optimum properties are achieved in the T5 condition after 2 hours at 330\u02daC followed by 10\u201316 hours at 170\u2013180\u02daC. Satisfactory properties may be obtained from 1\u20136 hours at 325\u2013360\u02daC. Water quenching is not required.<\/div><\/div><\/div><\/i><\/i><\/span>Physical properties<\/span><\/a><\/h4><\/div>\n\n- Specific gravity:<\/strong> 1.84<\/li>\n
- Coefficient of thermal expansion:<\/strong> 27.1x 10-6K-1<\/li>\n
- Thermal conductivity:<\/strong> 109 Wm-1K-1<\/li>\n
- Specific heat:<\/strong> 960 Jkg-1K-1<\/li>\n
- Electrical resistivity:<\/strong> 68 n\u03a9m<\/li>\n
- Modulus of elasticity:<\/strong> 44.1 GPa<\/li>\n
- Poissons ratio:<\/strong> 0.35<\/li>\n
- Melting range:<\/strong> 510\u2013640\u02daC<\/li>\n
- Damping index:<\/strong> 1.0<\/li>\n
- Brinell hardness:<\/strong> 55\u201370<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div>
<\/i><\/i><\/span>Design data<\/span><\/a><\/h4><\/div>\n\n- Minimum specification tensile properties<\/li>\n
- BS 2L.128<\/li>\n
- 0.2% proof stress:<\/strong> 135 MPa<\/li>\n
- Tensile strength:<\/strong> 200 MPa<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Other properties<\/span><\/a><\/h4><\/div>\nCastability<\/strong><\/p>\nCastings will contain minimal microporosity and the tendency to hot cracking is low. Castings are pressure tight and may be welded.<\/p>\n
Pattern makers shrinkage factor<\/strong><\/p>\n1.3%<\/p>\n
Weldability<\/strong><\/p>\nWeldable by the tungsten arc inert gas process (TIG) with a filler rod of a similar composition. Castings should be heat treated after welding.<\/p>\n
Machining<\/strong><\/p>\nElektron RZ5 castings, like all magnesium alloy castings, machine faster than any other metal. Providing the geometry of the part allows, the limiting factor is the power and speed of the machine rather than the quality of the tool material. The power required per cubic centimetre of metal removed varies from 9 to 14 watts per minute depending on the operation.<\/p>\n
Surface treatment<\/strong><\/p>\nAll the normal chromating, anodising and finishing treatments are applicable.<\/p>\n
Corrosion resistance<\/strong><\/p>\n\n- ASTM B117 Salt spray test<\/li>\n
- Corrosion rate: 4\u20136mg\/cm2\/day<\/li>\n
- 320\u2013480mpy<\/li>\n<\/ul>\n
Low temperature properties<\/strong><\/p>\n\n- Mechanical properties at -196\u02daC:<\/li>\n
- Elongation: 0.5%<\/li>\n
- Ultimate tensile strength: 245MPa<\/li>\n
- Impact value (unnotched): 0.7j<\/li>\n<\/ul>\n<\/div><\/div><\/div>
The versatility of this alloy makes it of interest to a wide range of designers dealing with aerospace, automotive, military and electronic applications. Castings in Elektron RZ5\/ZE41A are found in a wide range of applications including:<\/p>\n
- \n
- Helicopter gearboxes<\/li>\n
- Performance car components<\/li>\n
- Military equipment<\/li>\n
- Aircraft engines<\/li>\n
- Power tools<\/li>\n
- Aircraft components<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Specifications<\/span><\/a><\/h4><\/div>
\n- \n
- ASTM B80 ZE41A-T5 AMS 4439<\/li>\n
- MIL-M-46062<\/li>\n
- UNS M16410<\/li>\n
- MMPDS BS 2L.128<\/li>\n
- BS2970 MAG5-TE AIR 3380 RZ5<\/li>\n
- AFNOR G-Z4TR DIN 1729 3.5101<\/li>\n
- Aircraft Number 3.6104 UNAVIA 816-02 EN 1753<\/li>\n
- EN MB 35110<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Chemical composition<\/span><\/a><\/h4><\/div>
\n- \n
- Zinc:<\/strong> 3.5\u20135.0%<\/li>\n
- Rare earths:<\/strong> 0.8\u20131.7%<\/li>\n
- Zirconium:<\/strong> 0.4\u20131.0%<\/li>\n
- Magnesium:<\/strong> Balance<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Heat treatment<\/span><\/a><\/h4><\/div>
Optimum properties are achieved in the T5 condition after 2 hours at 330\u02daC followed by 10\u201316 hours at 170\u2013180\u02daC. Satisfactory properties may be obtained from 1\u20136 hours at 325\u2013360\u02daC. Water quenching is not required.<\/div><\/div><\/div><\/i><\/i><\/span>Physical properties<\/span><\/a><\/h4><\/div>
\n- \n
- Specific gravity:<\/strong> 1.84<\/li>\n
- Coefficient of thermal expansion:<\/strong> 27.1x 10-6K-1<\/li>\n
- Thermal conductivity:<\/strong> 109 Wm-1K-1<\/li>\n
- Specific heat:<\/strong> 960 Jkg-1K-1<\/li>\n
- Electrical resistivity:<\/strong> 68 n\u03a9m<\/li>\n
- Modulus of elasticity:<\/strong> 44.1 GPa<\/li>\n
- Poissons ratio:<\/strong> 0.35<\/li>\n
- Melting range:<\/strong> 510\u2013640\u02daC<\/li>\n
- Damping index:<\/strong> 1.0<\/li>\n
- Brinell hardness:<\/strong> 55\u201370<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div>
<\/i><\/i><\/span>Design data<\/span><\/a><\/h4><\/div>
\n- \n
- Minimum specification tensile properties<\/li>\n
- BS 2L.128<\/li>\n
- 0.2% proof stress:<\/strong> 135 MPa<\/li>\n
- Tensile strength:<\/strong> 200 MPa<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Other properties<\/span><\/a><\/h4><\/div>
\nCastability<\/strong><\/p>\n
Castings will contain minimal microporosity and the tendency to hot cracking is low. Castings are pressure tight and may be welded.<\/p>\n
Pattern makers shrinkage factor<\/strong><\/p>\n
1.3%<\/p>\n
Weldability<\/strong><\/p>\n
Weldable by the tungsten arc inert gas process (TIG) with a filler rod of a similar composition. Castings should be heat treated after welding.<\/p>\n
Machining<\/strong><\/p>\n
Elektron RZ5 castings, like all magnesium alloy castings, machine faster than any other metal. Providing the geometry of the part allows, the limiting factor is the power and speed of the machine rather than the quality of the tool material. The power required per cubic centimetre of metal removed varies from 9 to 14 watts per minute depending on the operation.<\/p>\n
Surface treatment<\/strong><\/p>\n
All the normal chromating, anodising and finishing treatments are applicable.<\/p>\n
Corrosion resistance<\/strong><\/p>\n
- \n
- ASTM B117 Salt spray test<\/li>\n
- Corrosion rate: 4\u20136mg\/cm2\/day<\/li>\n
- 320\u2013480mpy<\/li>\n<\/ul>\n
Low temperature properties<\/strong><\/p>\n
- \n
- Mechanical properties at -196\u02daC:<\/li>\n
- Elongation: 0.5%<\/li>\n
- Ultimate tensile strength: 245MPa<\/li>\n
- Impact value (unnotched): 0.7j<\/li>\n<\/ul>\n<\/div><\/div><\/div>
- Tensile strength:<\/strong> 200 MPa<\/li>\n<\/ul>\n<\/div><\/div><\/div>
- Coefficient of thermal expansion:<\/strong> 27.1x 10-6K-1<\/li>\n
- Rare earths:<\/strong> 0.8\u20131.7%<\/li>\n
- Zinc:<\/strong> 3.5\u20135.0%<\/li>\n
![\"\"](\"http:\/\/www.dam-dev.co.uk\/development\/wp-content\/uploads\/2026\/03\/Rotating-bending-fatigue-tests-on-sand-castings-1024x599-1.png\")
<\/p>\n![\"\"](\"http:\/\/www.dam-dev.co.uk\/development\/wp-content\/uploads\/2026\/03\/Fatigue-crack-growth-1024x598-1.webp\")
<\/p>\n![\"\"](\"http:\/\/www.dam-dev.co.uk\/development\/wp-content\/uploads\/2026\/03\/Typical-tensile-properties-1-1024x558-1.png\")
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<\/p>\n![\"\"](\"http:\/\/www.dam-dev.co.uk\/development\/wp-content\/uploads\/2026\/03\/Fatigue-properties-1-1024x586-1.png\")
<\/p>\n![\"\"](\"http:\/\/www.dam-dev.co.uk\/development\/wp-content\/uploads\/2026\/03\/Cut-up-properties-on-samples-taken-from-actual-castings-1-1024x398-1.png\")
<\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>![](\"http:\/\/www.dam-dev.co.uk\/development\/wp-content\/uploads\/2026\/03\/DS-452-Elektron-RZ5-03-26-1.jpg\" "\\"DS-452-Elektron-RZ5-03-26\\"")
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