![](\"http:\/\/www.dam-dev.co.uk\/development\/wp-content\/uploads\/2026\/03\/Elektron-21-sand-casting-ingot-mobile.jpg\" "\\"Elektron")
<\/span><\/div><\/div><\/div><\/div><\/div>Elektron\u00ae 21 sand casting ingot<\/h1><\/div>Our flagship high-strength, heat-treatable magnesium based casting alloy.<\/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>For use at temperatures up to 200\u02daC, this alloy has excellent corrosion resistance characteristics and castability, making it the suitable material for a range of aerospace applications.<\/p>\n<\/div>
<\/div><\/div><\/div><\/div><\/i><\/i><\/span>Applications<\/span><\/a><\/h4><\/div>Luxfer MEL Technologies has developed this lightweight, high performance alloy for aerospace applications. It is designed to provide superior mechanical properties and improved corrosion resistance together with good castability.<\/div><\/div><\/div><\/i><\/i><\/span>Specifications<\/span><\/a><\/h4><\/div>\n\n- AMS 4429<\/li>\n
- UNS M12310<\/li>\n
- MMPDS<\/li>\n
- ASTM B80<\/li>\n
- ISO 16220 MC65410<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Chemical composition<\/span><\/a><\/h4><\/div>\n\n- Zinc:<\/strong> 0.2\u20130.5%<\/li>\n
- Neodymium:<\/strong> 2.6\u20133.1%<\/li>\n
- Gadolinium:<\/strong> 1.0\u20131.7%<\/li>\n
- Zirconium:<\/strong> Saturated<\/li>\n
- Magnesium:<\/strong> Balance<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Heat treatment<\/span><\/a><\/h4><\/div>\nCastings are given the following T6 heat treatment to obtain optimum mechanical properties.<\/p>\n
Solution treat for 8 hours at 520\u02daC (970\u02daF), Hot water quench using water at 60\u201380\u02daC (140\u2013175\u02daF) or polymer quench, Age for 16 hours at 200\u02daC (400\u02daF), Air cool.<\/p>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Physical properties<\/span><\/a><\/h4><\/div>\n\n- Specific gravity:<\/strong> 1.82<\/li>\n
- Coefficient of thermal expansion:<\/strong> 26.3 x 10-6K-1<\/li>\n
- Thermal conductivity:<\/strong> 116 Wm-1K-1<\/li>\n
- Specific heat:<\/strong> 1,086 Jkg-1K-1<\/li>\n
- Electrical resistivity:<\/strong> 94.6 n\u03a9m<\/li>\n
- Modulus of elasticity:<\/strong> 44.8 x 103 MPa<\/li>\n
- Poissons ratio:<\/strong> 0.27<\/li>\n
- Melting range:<\/strong> 545\u2013640\u02daC<\/li>\n
- Brinell hardness:<\/strong> 65\u201375<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div>
<\/i><\/i><\/span>Design data<\/span><\/a><\/h4><\/div>\nMinimum specification tensile properties.<\/p>\n
\n- 0.2% proof stress:<\/strong> 145 MPa<\/li>\n
- Elongation:<\/strong> 2%<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Other properties<\/span><\/a><\/h4><\/div>\nCastability<\/strong><\/p>\n\n- Excellent castability as a consequence of low oxidation characteristics.<\/li>\n
- Fine-grained microstructure.<\/li>\n
- Pressure tight<\/li>\n<\/ul>\n
Pattern Makers Shrinkage Factor<\/strong><\/p>\n1.5%<\/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 to obtain optimum properties.<\/p>\n
Machining<\/strong><\/p>\nElektron 21 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>\nASTM B117 salt spray test corrosion rate for base metal:<\/p>\n
Our flagship high-strength, heat-treatable magnesium based casting alloy.<\/p>\n<\/div>
Product information<\/h2><\/div><\/div><\/div>Speak to a Mg Alloy expert<\/span><\/i><\/a><\/div><\/div><\/div><\/div><\/div>For use at temperatures up to 200\u02daC, this alloy has excellent corrosion resistance characteristics and castability, making it the suitable material for a range of aerospace applications.<\/p>\n<\/div>
<\/div><\/div><\/div><\/div><\/i><\/i><\/span>Applications<\/span><\/a><\/h4><\/div>Luxfer MEL Technologies has developed this lightweight, high performance alloy for aerospace applications. It is designed to provide superior mechanical properties and improved corrosion resistance together with good castability.<\/div><\/div><\/div><\/i><\/i><\/span>Specifications<\/span><\/a><\/h4><\/div>\n\n- AMS 4429<\/li>\n
- UNS M12310<\/li>\n
- MMPDS<\/li>\n
- ASTM B80<\/li>\n
- ISO 16220 MC65410<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Chemical composition<\/span><\/a><\/h4><\/div>\n\n- Zinc:<\/strong> 0.2\u20130.5%<\/li>\n
- Neodymium:<\/strong> 2.6\u20133.1%<\/li>\n
- Gadolinium:<\/strong> 1.0\u20131.7%<\/li>\n
- Zirconium:<\/strong> Saturated<\/li>\n
- Magnesium:<\/strong> Balance<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Heat treatment<\/span><\/a><\/h4><\/div>\nCastings are given the following T6 heat treatment to obtain optimum mechanical properties.<\/p>\n
Solution treat for 8 hours at 520\u02daC (970\u02daF), Hot water quench using water at 60\u201380\u02daC (140\u2013175\u02daF) or polymer quench, Age for 16 hours at 200\u02daC (400\u02daF), Air cool.<\/p>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Physical properties<\/span><\/a><\/h4><\/div>\n\n- Specific gravity:<\/strong> 1.82<\/li>\n
- Coefficient of thermal expansion:<\/strong> 26.3 x 10-6K-1<\/li>\n
- Thermal conductivity:<\/strong> 116 Wm-1K-1<\/li>\n
- Specific heat:<\/strong> 1,086 Jkg-1K-1<\/li>\n
- Electrical resistivity:<\/strong> 94.6 n\u03a9m<\/li>\n
- Modulus of elasticity:<\/strong> 44.8 x 103 MPa<\/li>\n
- Poissons ratio:<\/strong> 0.27<\/li>\n
- Melting range:<\/strong> 545\u2013640\u02daC<\/li>\n
- Brinell hardness:<\/strong> 65\u201375<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div>
<\/i><\/i><\/span>Design data<\/span><\/a><\/h4><\/div>\nMinimum specification tensile properties.<\/p>\n
\n- 0.2% proof stress:<\/strong> 145 MPa<\/li>\n
- Elongation:<\/strong> 2%<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Other properties<\/span><\/a><\/h4><\/div>\nCastability<\/strong><\/p>\n\n- Excellent castability as a consequence of low oxidation characteristics.<\/li>\n
- Fine-grained microstructure.<\/li>\n
- Pressure tight<\/li>\n<\/ul>\n
Pattern Makers Shrinkage Factor<\/strong><\/p>\n1.5%<\/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 to obtain optimum properties.<\/p>\n
Machining<\/strong><\/p>\nElektron 21 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>\nASTM B117 salt spray test corrosion rate for base metal:<\/p>\n
For use at temperatures up to 200\u02daC, this alloy has excellent corrosion resistance characteristics and castability, making it the suitable material for a range of aerospace applications.<\/p>\n<\/div>
<\/i><\/i><\/span>Applications<\/span><\/a><\/h4><\/div>Luxfer MEL Technologies has developed this lightweight, high performance alloy for aerospace applications. It is designed to provide superior mechanical properties and improved corrosion resistance together with good castability.<\/div><\/div><\/div><\/i><\/i><\/span>Specifications<\/span><\/a><\/h4><\/div>\n\n- AMS 4429<\/li>\n
- UNS M12310<\/li>\n
- MMPDS<\/li>\n
- ASTM B80<\/li>\n
- ISO 16220 MC65410<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Chemical composition<\/span><\/a><\/h4><\/div>\n\n- Zinc:<\/strong> 0.2\u20130.5%<\/li>\n
- Neodymium:<\/strong> 2.6\u20133.1%<\/li>\n
- Gadolinium:<\/strong> 1.0\u20131.7%<\/li>\n
- Zirconium:<\/strong> Saturated<\/li>\n
- Magnesium:<\/strong> Balance<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Heat treatment<\/span><\/a><\/h4><\/div>\nCastings are given the following T6 heat treatment to obtain optimum mechanical properties.<\/p>\n
Solution treat for 8 hours at 520\u02daC (970\u02daF), Hot water quench using water at 60\u201380\u02daC (140\u2013175\u02daF) or polymer quench, Age for 16 hours at 200\u02daC (400\u02daF), Air cool.<\/p>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Physical properties<\/span><\/a><\/h4><\/div>\n\n- Specific gravity:<\/strong> 1.82<\/li>\n
- Coefficient of thermal expansion:<\/strong> 26.3 x 10-6K-1<\/li>\n
- Thermal conductivity:<\/strong> 116 Wm-1K-1<\/li>\n
- Specific heat:<\/strong> 1,086 Jkg-1K-1<\/li>\n
- Electrical resistivity:<\/strong> 94.6 n\u03a9m<\/li>\n
- Modulus of elasticity:<\/strong> 44.8 x 103 MPa<\/li>\n
- Poissons ratio:<\/strong> 0.27<\/li>\n
- Melting range:<\/strong> 545\u2013640\u02daC<\/li>\n
- Brinell hardness:<\/strong> 65\u201375<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div>
<\/i><\/i><\/span>Design data<\/span><\/a><\/h4><\/div>\nMinimum specification tensile properties.<\/p>\n
\n- 0.2% proof stress:<\/strong> 145 MPa<\/li>\n
- Elongation:<\/strong> 2%<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Other properties<\/span><\/a><\/h4><\/div>\nCastability<\/strong><\/p>\n\n- Excellent castability as a consequence of low oxidation characteristics.<\/li>\n
- Fine-grained microstructure.<\/li>\n
- Pressure tight<\/li>\n<\/ul>\n
Pattern Makers Shrinkage Factor<\/strong><\/p>\n1.5%<\/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 to obtain optimum properties.<\/p>\n
Machining<\/strong><\/p>\nElektron 21 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>\nASTM B117 salt spray test corrosion rate for base metal:<\/p>\n
<\/i><\/i><\/span>Specifications<\/span><\/a><\/h4><\/div>\n\n- AMS 4429<\/li>\n
- UNS M12310<\/li>\n
- MMPDS<\/li>\n
- ASTM B80<\/li>\n
- ISO 16220 MC65410<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Chemical composition<\/span><\/a><\/h4><\/div>\n\n- Zinc:<\/strong> 0.2\u20130.5%<\/li>\n
- Neodymium:<\/strong> 2.6\u20133.1%<\/li>\n
- Gadolinium:<\/strong> 1.0\u20131.7%<\/li>\n
- Zirconium:<\/strong> Saturated<\/li>\n
- Magnesium:<\/strong> Balance<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Heat treatment<\/span><\/a><\/h4><\/div>\nCastings are given the following T6 heat treatment to obtain optimum mechanical properties.<\/p>\n
Solution treat for 8 hours at 520\u02daC (970\u02daF), Hot water quench using water at 60\u201380\u02daC (140\u2013175\u02daF) or polymer quench, Age for 16 hours at 200\u02daC (400\u02daF), Air cool.<\/p>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Physical properties<\/span><\/a><\/h4><\/div>\n\n- Specific gravity:<\/strong> 1.82<\/li>\n
- Coefficient of thermal expansion:<\/strong> 26.3 x 10-6K-1<\/li>\n
- Thermal conductivity:<\/strong> 116 Wm-1K-1<\/li>\n
- Specific heat:<\/strong> 1,086 Jkg-1K-1<\/li>\n
- Electrical resistivity:<\/strong> 94.6 n\u03a9m<\/li>\n
- Modulus of elasticity:<\/strong> 44.8 x 103 MPa<\/li>\n
- Poissons ratio:<\/strong> 0.27<\/li>\n
- Melting range:<\/strong> 545\u2013640\u02daC<\/li>\n
- Brinell hardness:<\/strong> 65\u201375<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div>
<\/i><\/i><\/span>Design data<\/span><\/a><\/h4><\/div>\nMinimum specification tensile properties.<\/p>\n
\n- 0.2% proof stress:<\/strong> 145 MPa<\/li>\n
- Elongation:<\/strong> 2%<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Other properties<\/span><\/a><\/h4><\/div>\nCastability<\/strong><\/p>\n\n- Excellent castability as a consequence of low oxidation characteristics.<\/li>\n
- Fine-grained microstructure.<\/li>\n
- Pressure tight<\/li>\n<\/ul>\n
Pattern Makers Shrinkage Factor<\/strong><\/p>\n1.5%<\/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 to obtain optimum properties.<\/p>\n
Machining<\/strong><\/p>\nElektron 21 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>\nASTM B117 salt spray test corrosion rate for base metal:<\/p>\n
- \n
- AMS 4429<\/li>\n
- UNS M12310<\/li>\n
- MMPDS<\/li>\n
- ASTM B80<\/li>\n
- ISO 16220 MC65410<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Chemical composition<\/span><\/a><\/h4><\/div>
\n- \n
- Zinc:<\/strong> 0.2\u20130.5%<\/li>\n
- Neodymium:<\/strong> 2.6\u20133.1%<\/li>\n
- Gadolinium:<\/strong> 1.0\u20131.7%<\/li>\n
- Zirconium:<\/strong> Saturated<\/li>\n
- Magnesium:<\/strong> Balance<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Heat treatment<\/span><\/a><\/h4><\/div>
\nCastings are given the following T6 heat treatment to obtain optimum mechanical properties.<\/p>\n
Solution treat for 8 hours at 520\u02daC (970\u02daF), Hot water quench using water at 60\u201380\u02daC (140\u2013175\u02daF) or polymer quench, Age for 16 hours at 200\u02daC (400\u02daF), Air cool.<\/p>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Physical properties<\/span><\/a><\/h4><\/div>
\n- \n
- Specific gravity:<\/strong> 1.82<\/li>\n
- Coefficient of thermal expansion:<\/strong> 26.3 x 10-6K-1<\/li>\n
- Thermal conductivity:<\/strong> 116 Wm-1K-1<\/li>\n
- Specific heat:<\/strong> 1,086 Jkg-1K-1<\/li>\n
- Electrical resistivity:<\/strong> 94.6 n\u03a9m<\/li>\n
- Modulus of elasticity:<\/strong> 44.8 x 103 MPa<\/li>\n
- Poissons ratio:<\/strong> 0.27<\/li>\n
- Melting range:<\/strong> 545\u2013640\u02daC<\/li>\n
- Brinell hardness:<\/strong> 65\u201375<\/li>\n<\/ul>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div>
<\/i><\/i><\/span>Design data<\/span><\/a><\/h4><\/div>
\nMinimum specification tensile properties.<\/p>\n
- \n
- 0.2% proof stress:<\/strong> 145 MPa<\/li>\n
- Elongation:<\/strong> 2%<\/li>\n<\/ul>\n<\/div><\/div><\/div>
<\/i><\/i><\/span>Other properties<\/span><\/a><\/h4><\/div>
\nCastability<\/strong><\/p>\n
- \n
- Excellent castability as a consequence of low oxidation characteristics.<\/li>\n
- Fine-grained microstructure.<\/li>\n
- Pressure tight<\/li>\n<\/ul>\n
Pattern Makers Shrinkage Factor<\/strong><\/p>\n
1.5%<\/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 to obtain optimum properties.<\/p>\n
Machining<\/strong><\/p>\n
Elektron 21 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
ASTM B117 salt spray test corrosion rate for base metal:<\/p>\n
- Elongation:<\/strong> 2%<\/li>\n<\/ul>\n<\/div><\/div><\/div>
- Coefficient of thermal expansion:<\/strong> 26.3 x 10-6K-1<\/li>\n
- Neodymium:<\/strong> 2.6\u20133.1%<\/li>\n
- Zinc:<\/strong> 0.2\u20130.5%<\/li>\n
![\"\"](\"http:\/\/www.dam-dev.co.uk\/development\/wp-content\/uploads\/2026\/03\/Effect-of-temperature-on-tensile-properties-1024x601-1.webp\")
<\/p>\n![\"\"](\"http:\/\/www.dam-dev.co.uk\/development\/wp-content\/uploads\/2026\/03\/Stress-time-relationship-at-200CB9AC-0.webp\")
<\/p>\n![](\"http:\/\/www.dam-dev.co.uk\/development\/wp-content\/uploads\/2026\/03\/DS-455-Elektron-21-03-26.jpg\" "\\"DS-455-Elektron-21-03-26\\"")
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