High-precision Copper Strip

Grade

China GB H70
American ASTM C26000
European EN -
Japanese JIS C2600

Chemical Composition

(Weight%)

Copper Cu 68.5-71.5
Iron Fe ≤0.1
Lead Pb ≤0.03
Tin Sn -
Oxygen O -
Phosphorus P -
Zinc Zn Remains

Product Properties

H70 has good ductility, deep drawing performance, weldability, platability and good corrosion resistance.

Application Fields

● Electronics and Electrical Appliances ● LED ● Heat Dissipation Components ● Home Decoration

Fatigue Strength

Fatigue strength is the maximum stress a material can withstand without fracture under 10^7 cycles of load, and it is related to the state of the selected material. Usually, the fatigue strength is about 1/3 of the tensile strength. For fine-grained solid solution alloys, the fatigue strength can be increased to 1/2 of the tensile strength.

Physical Properties

Density 8.5 g/cm³
Conductivity @20℃ 28 %IACS
Electrical Conductivity @20℃ - MS/m
Thermal Conductivity @20℃ 128 W/(m·K)
Specific Heat 0.38 J/(g.K)
Elastic Modulus 105 GPa
Poisson's Ratio - GPa
Coefficient of Thermal Expansion 19.9 10 -6 /K

Mechanical Properties

State Tensile Strength Yield Strength Hardness Elongation
  MPa ksi MPa HV A 50%
R300(O) ≥290 ≥42 -- ≤90 ≥40
R350(1/4H) 380-430 55-62 -- 100-120 ≥35
R410(1/2H) 400-480 58-70 -- 110-150 ≥25
R480(H) 440-560 64-81 -- 140-170 ≥15
R550(EH) 520-620 75-90 -- 160-190 ≥4
R630(SH) -- -- -- -- --

*For reference only

Bending Performance

State 90°R/T 180°R/T
  Good Way Bad Way Good Way Bad Way
R350(1/4H) -- -- -- --
R410(1/2H) Good Good Good Good
R480 -- -- -- --

*Test sample width 10mm thickness ≤0.5mm

Corrosion Resistance

H70 brass strip exhibits excellent corrosion resistance in atmospheric, water, and some non-acidic environments, especially performing well in non-acidic environments.

Related Downloads

Kainan Group Product Brochure

Download

Learn More

H70

Message

We can recommend suitable products for you according to your needs. Please fill in the following form, and we will contact you in time!