zinc high pressure die casting

Zinc Alloy ZA2

With a high tensile strength, ZL2 is a Zinc based alloy which can be used for hot chamber pressure diecast components or gravity casting. Used for small castings where hardness and high tensile strength are essential, the high copper content of this alloy can reduce the dimensional stability. ZL2 also suffers from a severe loss of ductility during ageing and should be avoided if post forming of the casting is envisaged. When designing a stressed component using ZL2 further reference should be made to the alloys properties, at elevated temperatures, after natural or artificial ageing and the alloys creep properties.

Alloy Designation

ZnAL4Cu3

Short Designation

ZL 2

Mechanical Properties

Supplied in diecast form

Tensile Strength

As Cast

328 MPa

Yield strength

As Cast

221 MPa

Impact Strength

As Cast

47 Joules

Elongation 50mm

As Cast

7%

Shear Strength

As Cast

317 MPa

Compressive Yield Strength

As Cast

269 MPa

Fatigue Strength

As Cast

59

Hardness BHN 500Kg

As Cast

100 max

Phyiscal Properties

Melting range

379 – 390 degC

Coefficient of Thermal expansion

27.4 um/m deg C

Electrical Conductivity

25 % IACS

Zinc Alloy ZA3

A general purpose alloy, ZL3 is primarily used for producing castings for a variety of applications on a hot chamber pressure diecasting machine. The alloy’s mechanical and physical properties make it ideal for use in castings for the engineering and automotive industry, household equipment and utensils, office equipment, builders’ hardware, locks and toys. ZL3 is easily machined, buffed, polished, lacquered and electroplated for decorative or functional purposes. When designing a stressed component using ZL3 designers should refer to the alloy’s properties, at elevated temperatures, after natural or artificial ageing and the alloy’s creep properties.

Alloy Designation

ZnAL4

Short Designation

ZL 3

Mechanical Properties

Supplied in diecast form

Tensile Strength

As Cast

283 MPa

Yield Strength

As Cast

221 MPa

Impact strength

As Cast

58 Joules

Elongation 50mm

As Cast

10%

Shear Strength

As Cast

214 MPa

Compressive Yield Strength

As Cast

413 MPa

Fatigue Strength

As Cast

48

Hardness BHN 500Kg

As Cast

82 max

Physical Properties

Melting Range

381 – 387 degC

Coefficient of Thermal Expansion

27.4 um/m deg C

Electrical Conductivity

27 % IACS

Zinc Alloy ZA5

ZL5 is generally used for castings that require moderately higher strength and hardness and where dimensional stability is not an important criterion in the product application. ZL5 is often specified for automotive applications in Europe. The alloy contains copper as specified alloying element, this promotes marginally better casting properties than the ZL3 alloy and improves mechanical properties. The nominal 1% makes the alloy more expensive and therefore its use should be restricted to applications requiring its higher properties. ZL5 will accept any finish specified for ZL3. When designing a stressed component using ZL5 further reference should be made to the alloys properties, at elevated temperatures, after natural or artificial ageing and the alloys creep properties.

Alloy Designation

ZnAL4Cu1

Short Designation

ZL 5

Mechanical Properties

Supplied in diecast form

Tensile Strength

As Cast

328 MPa

Yield Strength

As Cast

221 MPa

Impact Strength

Aged

65 Joules

Elongation 50mm

As Cast

7%

Shear Strength

As Cast

262 MPa

Compressive Yield Strength

As Cast

599.8 MPa

Fatigue Strength

As Cast

56 MPa

Hardness BHN 500Kg

As Cast

91 max

Physical Properties

Melting Range

380 – 386 deg C

Coefficient of Thermal Expansion

27.4 um/m deg C

Electrical Conductivity

26 % IACS

Zinc Alloy ZA27

ZL27 is a zinc alloy containing 27% aluminium. It has exceptionally high strength and excellent bearing properties. Originally this alloy was envisaged for use in the sand and gravity diecasting industries but, has subsequently found a niche market as a pressure diecasting alloy using cold chamber diecasting machines. ZL27 offers the extended tool life applicable to zinc alloys which, when combined with its higher strength and hardness makes the alloy an automatic choice when aluminium alloys are unable to meet the service conditions anticipated. When designing a stressed component using ZL27 further reference should be made to the alloys properties, at elevated temperatures, after natural or artificial ageing and the alloys creep properties.

Alloy Designation

ZnAL27Cu2

Short Designation

ZL 27

Mechanical Properties

Supplied in diecast form

Tensile Strength

As Cast

426 MPa

Yield Strength

As Cast

371 MPa

Impact strength

As Cast

5 Joules

Elongation 50mm

As Cast

2.5%

Shear Strength

As Cast

296 MPa

Compressive Yield Strength

As Cast

385 MPa

Fatigue Strength

As Cast

145 MPa

Hardness BHN 500Kg

As Cast

122 max

Physical Properties

Melting Range

376 – 484 deg C

Coefficient of Thermal Expansion

26 um/m deg C

Electrical Conductivity

29.7 % IACS