C425 Copper-Zinc-Tin (CuSn3Zn9)

  • Home
  • Fisk Products
  • C42500

Overview

Alloy C425 is a low zinc-containing alloy with good combination of tensile strength, electrical conductivity, formability and corrosion resistance. Applications include electrical springs, connectors and terminals.

Physical Properties

Annealing Range (Min) 800 °F
Annealing Range (Max) 1300 °F
Density 0.316 lb/in³
Electrical Resistivity (Annealed) 37 Ω·cir-mil/ft @ 68 °F
Electrical Conductivity (Annealed) 28% IACS @ 68 °F
Thermal Conductivity 69 Btu/ft²/ft·hr/°F @ 68 °F
Coefficient of Thermal Expansion 10.2 per °F (68-572 °F)
Modulus of Elasticity (Tension) 16 ksi
Melting Point (Solidus) 1,700 °F
Melting Point (Liquidus) 1,900 °F
Annealing Range (Min) 427 °C
Annealing Range (Max) 704 °C
Density 8.94 gm/cm³
Electrical Resistivity (Annealed) 6.16 µΩ·cm @ 20 °C
Electrical Conductivity (Annealed) 0.16 MS·cm @ 20 °C
Thermal Conductivity 119 W/m·K @ 20 °C
Coefficient of Thermal Expansion 18.4 per °C (20-300 °C)
Modulus of Elasticity (Tension) 110 Mpa
Melting Point (Solidus) 927 °C
Melting Point (Liquidus) 1,038 °C

Round Wire

TEMPER NAME TEMPER CODE TENSILE
STRENGTH (ksi)
MILL LIMITS
(inch)
Min Max
Annealed   42.0 52.0 .0010 - .1285 inch
1/4 Hard H01 57.0 72.0
1/2 Hard H02 73.0 88.0
3/4 Hard H03 85.0 100
Hard H04 95.0 110
Extra Hard H06 105 120
Spring H08 115  
TEMPER NAME TEMPER CODE TENSILE
STRENGTH (Mpa)
MILL LIMITS
(mm)
Min Max
Annealed   280 360 .0254 - 3.264 mm
1/4 Hard H01 390 500
1/2 Hard H02 500 610
3/4 Hard H03 580 690
Hard H04 650 760
Extra Hard H06 720 830
Spring H08 790  

Square Wire

TEMPER NAME TEMPER CODE TENSILE
STRENGTH (ksi)
MILL LIMITS
(inch)
Min Max
Annealed   42.0 52.0 .0100 - .0808 inch 
1/4 Hard H01 57.0 72.0
1/2 Hard H02 73.0 88.0
3/4 Hard H03 85.0 100
Hard H04 95.0 110
Extra Hard H06 105 120
Spring H08 115  
TEMPER NAME TEMPER CODE TENSILE
STRENGTH (Mpa)
MILL LIMITS
(mm)
Min Max
Annealed   280 360 .2540 - 1.905 mm
1/4 Hard H01 390 500
1/2 Hard H02 500 610
3/4 Hard H03 580 690
Hard H04 650 760
Extra Hard H06 720 830
Spring H08 790  

Rolled Flat

TEMPER NAME TEMPER CODE TENSILE
STRENGTH (ksi)
MILL LIMITS
(inch)
Min Max
Annealed   40.0 50.0 Thickness:
.0100 - .0500 inch

Width:
.0150 - .2500 inch
1/4 Hard H01 49.0 59.0
1/2 Hard H02 57.0 69.0
3/4 Hard H03 62.0 74.0
Hard H04 70.0 82.0
Extra Hard H06 76.0 88.0
Spring H08 84.0 94.0
Extra Spring H10 92.0  
TEMPER NAME TEMPER CODE TENSILE
STRENGTH (Mpa)
MILL LIMITS
(mm)
Min Max
Annealed   270 350 Thickness:
.2540 - 1.905 mm

Width:
.3810 - 6.350 mm
1/4 Hard H01 330 410
1/2 Hard H02 390 480
3/4 Hard H03 420 520
Hard H04 480 570
Extra Hard H06 520 610
Spring H08 570 650
Extra Spring H10 630  

Contact Request

Please provide your contact information along with any relevant details, below, and a representative from Fisk Alloy will contact you shortly.

Quality Second to None

Providing Innovative and Sustainable Solutions

If you’d like to request a sample, have specific product questions, or you’re interested in finding out more about which Fisk products might be best for your application or design, please fill out the form and we will contact you.

Environmental
Sensitivity
Personalized
Solutions
Performance
Measures