The Impact Extrusion Process.
A part which is formed in a confined die from a cold metal slug which has been lubricated. Using a single stroke of applied force, the metal extrudes around the punch and through an opening in the punch or die. There are three types of impact extrusions; Forward Impacting, Reverse Impacting and Combination Impacting.
Commercial Dimensional Tolerances of Mueller Impact Extrusions
|Commercial Tolerances (Inches ±)||Minimum Wall Thickness (Inches)|
|Outside Diameter (Inches)||O.D.||I.D.||Bottom||1100 Alloy||6061 Alloy||2014 Alloy||7075 Alloy|
Wall tolerance (concentricity) generally is = 10% of the wall thickness for thin walls up to 0.25 and 7% for heavier walls between 0.25 and 1.00 inches. The above is offered as a guide only, each design should be reviewed by a Mueller Impacts Co. engineer for acceptable tolerances.
Materials currently formed by Mueller Impact Extrusions
|1100||Aluminum||Excellent conductivity and heat transference. Good corrosion resistance.|
|2014||Aluminum and Copper||Excellent mechanical properties. Heat treatable.|
|3003||Aluminum and Manganese||Moderate strength. Non heat treatable. Brazeable applications.|
|4032||Aluminum and Silicon||High wearing properties.|
|5086||Aluminum and Magnesium||Non heat treatable. Good strength and corrosion resistance.|
|6020||Aluminum and Tin||Suitable replacement for leaded aluminum alloys.|
|62 SN||Aluminum and Tin||Suitable replacement for leaded aluminum alloys.|
|6061||Aluminum with Silicon & Magnesium||Heat treatable & medium strength. Very versatile, many applications.|
|6063||Aluminum with Silicon & Magnesium||Heat treatable & medium strength. Good corrosion resistance.|
|6082||Aluminum with Silicon & Magnesium||Heat treatable & medium strength. Very versatile, many applications.|
|7075||Aluminum and Zinc||Heat treatable. For high strength applications.|
* Other materials available. Please contact Mueller with any requests.