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RE-Strengthened Mg Alloy for Casting Processes: LX2701

Light weight and ultra-thin are ongoing trend of designs for laptops, phones, tablets, AR glasses and more mobile 3C products. This is the reason for selecting Magnesium (Mg) to be the mainstream materials of outer cases or internal structures. Lots of Mg-alloy products are formed by casting processes, such as die casting, thixomolding and semisolid casting. 

 

AZ91D Mg alloy has been widely used as the material for producing 3C products for years, however, its fluidity and mechanical properties are not enough for ultra-thing products. Requirement of heat dissipation improvement emerged with rapidly upgrading performances of 3C products, but thermal conductivity is also the problem of AZ91D. In contrast to anodizable CNC-grade alluminum, painting is the main coloring process for AZ91D casts especially for larger-size products (ex: 13.5" laptop's cases). As what everyone knows that worse metal-similar sense of touch is a puzzle of painting.

After long-term research and development, now we are honor to offer alternative Mg alloy strengthened by rare earth elements for above-mentioned casting processes─LX2701. LX2701 features better machining condition, higher mechanical properties and more effective heat dissipation than AZ91D. Due to its high purity, moreover, LX2701-made casts are feasible to be applied by physical vapor deposition (PVD) surface treatment with different colors. The deposited metal elements onto LX2701 casts keep their excellent heat dissipation and superior sense of touch.

                                                                                               

​LX2701 RE Mg alloy 

 

 

 

 

 

 

 

 

 

 

 

 


 

​LX2701 vs. AZ91D 

Casts Information: 

  • Laptop’s D Covers

  • D Cover Size:14.5”

  • D Cover Thickness:0.58 mm 

  • Process:Semi-Solid Casting

  • Process Time:August 2017 

  • SGS Test Date:September 2017 

  • Test Standard: JIS

  • Test Model: SIMADZU  25-ton Universal Testing Machine AG-1/200KN
     

​Ingot

  • Standard Dimension

  • For Die Casting

    • Hot Chamber​

    • Cold Chamber

Pellet​

  • Standard Dimension

  • For Thixomolding

​Cylinder

  • Standard Dimension

    • ​Diameter: 90.00 ± 0.02 mm

    • Length: 300.00 ± 1.00 mm

  • For Semi-Solid Casting

LX2701

AZ91D

14.5" Laptop's D Cover formed by Semisolid Casting

LX2701

AZ91D

Tensile Strength (MPa)

232

190

Yield Strength (MPa)

197

154

Hardness

(HB)

70

63

Elongation

(%)

4

3

Density

(g/m  )

3

1.82

1.81

Young's Modulus

(GPa)

54

45

Thermal Conductivity

(W/m-k)

69

51

​LX2701 Casts with PVD Surface Treatment

​Silver (13.5")

Rose Gold (13.5")

Iron Gray (13.5")