Mechanical properties vary significantly depending on the material state (annealing, cold working, etc.):

1. Annealed state (soft state)

Tensile strength (σb): 330-372 MPa or 340-460 MPa

Yield strength (σ₀.₂): 110-158 MPa or 70-230 MPa

Elongation (δ): ≥25% (some data show that it can reach 54-66%)

Hardness (HV): 85-145 or Rockwell B hardness 53-93

2. Cold work hardening state (such as H08 superhard state)

Tensile strength (σb): up to 830 MPa or 890 MPa

Yield strength (σ₀.₂): 450 MPa

Elongation (δ): as low as 3%

Other parameters

Elastic modulus (E): 110 GPa

Poisson's ratio: 0.31～0.34

Shear strength: 220～390 MPa

Key performance characteristics

Processing performance:

Excellent cold and hot processing performance, suitable for complex forming such as deep drawing and molding.

Contains a small amount of lead (0.03-0.07%) to improve machinability and reduce tool wear.

Corrosion resistance:

Stable in general atmosphere, fresh water and sea water, but prone to stress corrosion cracking, annealing treatment is required to eliminate internal stress.

Easy to oxidize and dezincify at high temperature, and protective atmosphere processing is required.

Physical properties:

Density: 8.53 g/cm³

Melting point: 899～955°C

Electrical conductivity: 28%～37% IACS (about 1/3 of pure copper)

Thermal conductivity: 120～138 W/(m·K)