C197 High Performance Alloy

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Overview

Alloy C197 is a high conductivity copper alloy possessing an excellent combination of strength, conductivity and softening resistance. This alloy can be substituted for medium tempers of brass and bronze when higher electrical conductivity is required or better solderability is needed. Alloy C197 is an improved version of alloy C194 and has substantially greater conductivity at the same strength levels.

Physical Properties

Annealing Range (Min) 700 °F
Annealing Range (Max) 1200 °F
Density 0.319 lb/in³
Electrical Resistivity (Annealed) 13 Ω·cir-mil/ft @ 68 °F
Electrical Conductivity (Annealed) 80% IACS @ 68 °F
Thermal Conductivity 150 Btu/ft²/ft·hr/°F @ 68 °F
Coefficient of Thermal Expansion 9.7 per °F (68-572 °F)
Modulus of Elasticity (Tension) 17 ksi
Modulus of Rigidity (Tension) 6 ksi
Melting Point (Solidus) 1,700 °F
Melting Point (Liquidus) 1,900 °F
Annealing Range (Min) 371 °C
Annealing Range (Max) 649 °C
Density 8.94 gm/cm³
Electrical Resistivity (Annealed) 2.16 µΩ·cm @ 20 °C
Electrical Conductivity (Annealed) 0.47 MS·cm @ 20 °C
Thermal Conductivity 260 W/m·K @ 20 °C
Coefficient of Thermal Expansion 17.5 per °C (20-300 °C)
Modulus of Elasticity (Tension) 119 Mpa
Modulus of Rigidity (Tension) 45 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   39.0 47.0 .0010 - .1285 inch
1/4 Hard H01 50.0 65.0
1/2 Hard H02 60.0 75.0
3/4 Hard H03 70.0 85.0
Hard H04 80.0 95.0
Spring H08 90.0  
TEMPER NAME TEMPER CODE TENSILE
STRENGTH (Mpa)
MILL LIMITS
(mm)
Min Max
Annealed   260 330 .0254 - 3.264 mm
1/4 Hard H01 340 450
1/2 Hard H02 410 520
3/4 Hard H03 480 590
Hard H04 550 660
Spring H08 620  

Square Wire

TEMPER NAME TEMPER CODE TENSILE
STRENGTH (ksi)
MILL LIMITS
(inch)
Min Max
Annealed   39.0 47.0 .0100 - .0808 inch 
1/4 Hard H01 50.0 65.0
1/2 Hard H02 60.0 75.0
3/4 Hard H03 70.0 85.0
Hard H04 80.0 95.0
Spring H08 90.0  
TEMPER NAME TEMPER CODE TENSILE
STRENGTH (Mpa)
MILL LIMITS
(mm)
Min Max
Annealed   260 330 .2540 - 1.905 mm
1/4 Hard H01 340 450
1/2 Hard H02 410 520
3/4 Hard H03 480 590
Hard H04 550 660
Spring H08 620  

Rolled Flat

TEMPER NAME TEMPER CODE TENSILE
STRENGTH (ksi)
MILL LIMITS
(inch)
Min Max
Annealed O60 43.0 53.0 Thickness:
.0100 - .0500 inch

Width:
.0150 - .2500 inch
1/2 Hard H02 53.0 63.0
Hard H04 60.0 70.0
Spring H08 70.0 76.0
TEMPER NAME TEMPER CODE TENSILE
STRENGTH (Mpa)
MILL LIMITS
(mm)
Min Max
Annealed O60 290 370 Thickness:
.2540 - 1.905 mm

Width:
.3810 - 6.350 mm
1/2 Hard H02 360 440
Hard H04 410 490
Spring H08 480 530

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