Sunnforest Magnesium - the Industrial Mineral Products Division of Sunnforest in China and Singapore
Magnesium Tooling Plate
TOOLING PLATE is specially produced to provide a flat plate surface with moderate strength and ductility.The production process results in plate with exceptional dimensional stability in machining and remains stable over time.There is sufficient ductility for limited room temperature forming combined with weldability to allow the manufacture of a multitude of complex parts
Those applications requiring a flat surface or high dimensional stability benefit from the use of tooling plate.Typical uses include jigs, fixtures, optical benches, vibration test equipment and inspection gauges.Tooling plate is non-magnetic and has high electrical and thermal conductivity filling many material requirements in the electronics and computer industries.
The high strength-to-weight ratio of magnesium minimizes damage to tools during “in use”handling, thereby increasing tool life.Original tolerances are unaffected, even after long use.Tooling plate is non-galling, with a low coefficient of friction, reducing wear over the lifetime of the tool.Alkaline cleaners will not affect the tolerances of toolplate fixtures, allowing cleaning without danger of damaging sensitive surfaces.As a rolled product, tooling plate is free of internal voids which could lead to premature failure.
Minimum mechanical properties are not guaranteed
AMBIENT TEMPERATURE MECHANICAL PROPERTIES
TYPICAL TENSILE PROPERTIES
0.2% Proof stress 130 Mpa
Tensile strength 240 Mpa
TYPICAL COMPRESSIVE PROPERTIES
0.2% Proof stress 70 Mpa
Aluminum 3% nom.
Zinc 1% nom.
Tooling plate is delivered in the thermally stabilized condition. User thermal processing is not required.
Specific gravity 1.78
Coefficient of thermal expansion 26.8x10-6K-1
Specific heat 1040JKG-1K-1
Thermal conductivity 76.9Wm-1K-1
Electrical resistivity 92nΩm
Modulus of elasticity 45x109pa
Poissons ratio 0.35
Melting range 566-632 C
Tooling plate has an exceptional capacity for absorbing vibrational energy and dissipating it in the form of heat energy.
This unique characteristic can be effectively utilized by designers for the attenuation of vibration and noise. A comparison with other engineering materials rates tooling plate very well in what can be a critical design factor.
SPECIFIC DAMPING CAPACITY
Cast pure magnesium 100%
Tooling Plate 49%
Gray Cast Iron 10%
Martensitic Stainless 8%
Ductile Iron 2%
Austenitic Stainless 1%
Aluminum 355-T6 0.4%
Gas shielded metal arc and most other welding processes can be used successfully to produce welds with 95% of the parent plate strength.
Generally weldments will require stress relief for dimensional should be reviewed individually.
Tooling plate, like all magnesium alloy plate, machines 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 centimeter of metal removed varies from 9 to 14 watts per minute depending on machining operation.This compares favorably with other engineering materials.
TYPICAL MACHINE POWER
Tooling plate 11 w-min-1cm-3
Aluminum plate 20 w-min-1cm-3
Brass 25 w-min-1cm-3
Cast Iron 38 w-min-1cm-3
Mild Steel 69w-min-1cm-3
Tooling plate has excellent dimensional stability during and after machining, even when machines extensively. This, coupled with the superior surface finish readily obtained in machining, makes tooling plate a strong candidate for dimension critical items.
All normal chromating, anodizing, plating, and finishing treatments have been successfully applied to tooling plate.