Magnesium Ingots&Alloy

Model No: MgIngot-001     

Specification: Mg 99.90% minimum
Size of Ingot: Commonly 7.5±0.5 KGS, other sizes availablePacking:1000 -1250 KGS in a Magnesium/Wooden pallet strapped with secure steel band and covered with strong poly-hood.Minimum Order Quantity: 20-50 Metric Ton Supply Ability: 1900±10 Metric Ton per Month Port: Tianjin seaport and others  Payment Terms: L/C or TT       Delivery Time: 30 days, sometimes immediate

Lam Coke &Coal Powder
Model No: Low Ash Coke (Lam coke)-002
Specification:25-80 mm Ash 12.0 % max. Sulphur 1.0 % max. Moisture 5.0 % max. Volatile matter 1.2 % max. M 40 75.0 % min. M 10 8.0 % max. < 25mm 5.0 % max. > 80 mm 10.0 % max.
Package: In Bulk, in 10-30k Vessel sizes, sold both in FOB and CNF basis.
Minimum Order Quantity: 10000 Metric Ton 12,500 MTs
Supply Ability: 500000 Metric Ton per Month
Port: Tianjin seaport and others
Payment Terms: L/C or TT
Delivery Time: 30 days, sometimes immediate


        Coal-tar &Coke tar

Model No: Coal-tar or Coke tar-003

Specification: black mucosity liquid, has special smell.Comparatively density, (water=1) 1.18~ 1.23 flash points, <23
Minimum Order Quantity: 100 Metric Ton       Supply Ability: 60000 Metric Ton per Month

Port: Tianjin seaport and others

Payment Terms: L/C or TTDelivery Time: 30 days, sometimes immediate

Magnesium is the ideal material for applications where weight saving is a priority, having the lowest density of all structural metals. Almost as light in weight as plastic, magnesium has the advantage of greater strength and rigidity along with inherent EMI shielding, durability, heat-dissipation and full recyclability.

  • a quarter the weight of steel
  • one third lighter than aluminium
  • has the best strength to weight ratio of common structural metals
  • has exceptional die-casting characteristics

Magnesium is the metal of the future and today with the die casting demand for use in the automotive sector expected to double in the next decade.

Magnesium (Mg) is the eighth most abundant element and the sixth most common metal in the earth's crust. It comprises about 2.5 percent of the composition of the earth's surface but does not occur naturally in its metallic form.

Magnesium is a necessary element for all living organisms both animal and plant. Chlorophyll, the photo-synthetic green material in plants is structured around a magnesium atom, while in animals, magnesium is a key component of bones and tissues. Magnesium is the lightest of all structural metals and has a melting point of 650 degrees centigrade, its major attributes are:

  • USES: Magnesium is non-toxic, non-magnetic, and used in car parts, laptop computers, mobile phones and power tools.
  • WEIGHT: Lightest of all structural metals, 75 percent lighter than steel and 33 percent lighter than aluminium
  • STRENGTH: Has exceptional strength to weight ratio of load bearing parts to steel and aluminium
  • DIE CASTING: Molten magnesium viscosity makes for improved die-casting for larger more complex components
  • VIBRATION: Excellent ability to absorb energy vibration, acts as a damper and is highly dent resistant
  • ENVIRONMENT: Lightweight parts are the key to reducing vehicle weight and therefore improving automotive fuel efficiency and reducing greenhouse gas emissions
  

 

Characteristic physical properties of magnesium alloys

Property

Unit

Temperature

Magnesium alloys

AZ91

AM60

AM50

Density

kg/m3

20°C

1810

1800

1770

Liquidus temperature

°C

  

598

615

620

Melt-on temperature

°C

  

420-435

420-435

420-435

Linear expansion

um/m

20-100°C

26

26

26

Thermal conductivity

W7(k-m)

20°C

51

61

65

Electrical conductivity

MS/m

20°C

6,6

-

9,1

Mechanical properties of magnesium alloys

Property

Unit

Magnesium alloys

AZ91

AM60

AM50

Tensile strength Rm

MPa

240 (250)

225 (240)

210 (230)

Permanent elongation limit Rp02

MPa

160 (160)

130 (130)

125 (125)

Crushing yield point

MPa

160

130

125

Breaking elongation

%

3 (7)

8 (13)

10 (15)

Modulus of elasticity

GPa

45

45

45

Modulus of elasticity in shear

GPa

17

17

17

Brinell hardness

 

70

65

60

Impact strength Charpy, without notch

J

6 (9)

17 (18)

18 (18)

Mechanical properties of magnesium alloys with room temperature. The values in brackets show the property values for test bars cast separately.

Shearing resistance and compression resistance of die casting alloys

Material group

Shearing resistance N/mm2

Compression resistance N/mm2

Aluminium alloys

0,8 x tensile strength

1,5 x tensile strength

Zinc alloys

0,8 x tensile strength

1,5 x tensile strength

Magnesium alloys

0,5 to 0,8 x tensile strength

2,0 x tensile strength

Shearing resistance and compression resistance of die casting alloys

Further material properties of die casting alloys

Material group

E-Module kN/mm2

Coefficient of thermal expansion 20 to 100°C um

Melting range °C

Specific thermal capacity kW'S

Electrical conductivity S ° m

Thermal conductivity W

m'K

K'g

mm2

K'cm

Aluminum alloys

68... 78

20.... 24

510... 645

0,96

12... 28

0,84... 1,63

Zinc alloys

80... 85

27

380 ... 390

0,102... 0,108

15... 16

0,92 ... 1,05

Magnesium alloys

40... 45

26

470 ... 620

1

6... 10

0,50 ... 0,84

The values are reference values and depend on the composition of the alloy and on its microstructural status.

Machining of magnesium parts

From all well-known design metals, magnesium and its alloys are the easiest to machine. Advantages:

  • low specific cutting forces and therefore low energy required
  • high tool lives
  • short chips caused by the formation of shearing chips
  • high surface quality
  • high cutting speeds and therefore higher forward feeds.

Magnesium alloys can be machined with higher speed and higher forward feeds than other metals. These advantages reduce the cost of machining considerably by: Lower invest in machines and tools, lower machine and working costs and less scrap.