CFCC(Carbon Fiber Composite Cable)

General Information of CFCC

Outline of CFCC

Making the most of carbon fiber's excellent material properties, CFCC shows superior performances in terms of High Tensile Strength, Flexibility, Lightweight, High Corrosion Resistance, Non-Magnetism, and Low Linear Expansion in comparison with conventional cables. CFCC can be easily winded into a coil or onto a reel because of its stranded construction, thus can be applied as long span cables.

Notes on handling CFCC:
CFCC is a composite material consisting of carbon fibers and a matrix resin. As CFCC is different from steel members, special care should be taken; i.e. not to cause flaws, deformation or deterioration on handling. Especially, refrain from dropping hard and heavy objects (such as hammers) / sparking of welding/fire on CFCC, or bending CFCC steeply. CFCC damaged by any of these should be discarded.
Standard Specifications
Standard specifications of CFCC are shown below:
(Cross section figure) Uni-strand
Designation U 5.0Φ
Diameter (mm) 5.0
Effective cross-sectional area(mm2) 15.2
Guaranteed breaking load(kN) 38
Unit weight per meter(g/m) 30
Elastic modulus(kN/mm2) 167
(Cross section figure) 7 strands
Designation 1×7 7.5Φ
Diameter (mm) 7.5
Effective cross-sectional area(mm2) 31.1
Guaranteed breaking load(kN) 76
Unit weight per meter(g/m) 60
Elastic modulus(kN/mm2) 155
(Cross section figure) 7 strands
Designation 1×7 10.5Φ
Diameter (mm) 10.5
Effective cross-sectional area(mm2) 57.8
Guaranteed breaking load(kN) 141
Unit weight per meter(g/m) 111
Elastic modulus(kN/mm2) 155
(Cross section figure) 7 strands
Designation 1×7 12.5Φ
Diameter (mm) 12.5
Effective cross-sectional area(mm2) 76.0
Guaranteed breaking load(kN) 184
Unit weight per meter(g/m) 145
Elastic modulus(kN/mm2) 155
(Cross section figure) 7 strands
Designation 1×7 15.2Φ
Diameter (mm) 15.2
Effective cross-sectional area(mm2) 115.6
Guaranteed breaking load(kN) 270
Unit weight per meter(g/m) 221
Elastic modulus(kN/mm2) 155
(Cross section figure) 7 strands
Designation 1×7 17.2Φ
Diameter (mm) 17.2
Effective cross-sectional area(mm2) 151.1
Guaranteed breaking load(kN) 385
Unit weight per meter(g/m) 289
Elastic modulus(kN/mm2) 155
(Cross section figure) 7 strands
Designation 1×7 19.3Φ
Diameter (mm) 19.3
Effective cross-sectional area(mm2) 186.7
Guaranteed breaking load(kN) 445
Unit weight per meter(g/m) 355
Elastic modulus(kN/mm2) 155
(Cross section figure) 19 strands
Designation 1×19 20.5Φ
Diameter (mm) 20.5
Effective cross-sectional area(mm2) 206.2
Guaranteed breaking load(kN) 316
Unit weight per meter(g/m) 410
Elastic modulus(kN/mm2) 137
(Cross section figure) 19 strands
Designation 1×19 25.5Φ
Diameter (mm) 25.5
Effective cross-sectional area(mm2) 304.7
Guaranteed breaking load(kN) 467
Unit weight per meter(g/m) 606
Elastic modulus(kN/mm2) 137
(Cross section figure) 19 strands
Designation 1×19 28.5Φ
Diameter (mm) 28.5
Effective cross-sectional area(mm2) 401.0
Guaranteed breaking load(kN) 594
Unit weight per meter(g/m) 777
Elastic modulus(kN/mm2) 137
(Cross section figure) 37 strands
Designation 1×37 35.5Φ
Diameter (mm) 35.5
Effective cross-sectional area(mm2) 591.2
Guaranteed breaking load(kN) 841
Unit weight per meter(g/m) 1,185
Elastic modulus(kN/mm2) 127
(Cross section figure) 37 strands
Designation 1×37 40.0Φ
Diameter (mm) 40.0
Effective cross-sectional area(mm2) 798.7
Guaranteed breaking load(kN) 1,200
Unit weight per meter(g/m) 1,529
Elastic modulus(kN/mm2) 145
*Values in this table are standard values and are subject to change without prior notice.
Structural Symbols and Cross Section of CFCC
CFCC Structures Structural symbol Cross-section figure
Uni-strand U
7 strands 1x7
19 strands 1x19
37 strands 1x37
Terminal Fixers

Terminal fixing methods currently applied for CFCC are roughly distinguished into 3 types shown below:

Resin filling method Type Symbol
Expansive material filling method For single cable (CFCC 1 pc.) ES
For multiple cables (CFCC more than 2 pcs.) EM
Wedge with buffer material method For single cable (CFCC 1 pc.) WS

1. Assembly of CFCC and terminal fixers is to be done at Tokyo Rope factory.
2. Terminal fixing methods other than above-mentioned are under development to meet diversified usages.




Formed Parts

CFCC can be formed into various shapes at our factory.
These parts can be used as reinforcing members for concrete structures.

Standard characteristics
Property Item Character
istic value
General mechanical property Tensile strength kN/mm2 *1 2.69
Tensile modulus kN/mm2 *1 155
Breaking elongation (%) 1.7
Gravity 1.6
Static property Ratio of relaxation (%) *2 1.3
Creep strain *3 0.07x10-3
Coefficient of linear expansion (x10-6 /°C) *4 0.6
Specific resistance (µΩcm) 3,000
Creep failure load ratio *5 0.85
Miscellaneous Fatigue capacity (N/mm2) *6 780
Bending stiffness kN·cm2 56.9
Heat resistance (°C) 130~180
Acid resistance Superior to steel
Alkali resistance Equal to steel

※1. The value was calculated with effective cross-sectional area.
※2. 0.7pu, 1000hrs (20±2°C), in conformity with JSCE-E534
※3. 0.6pu, 1000hrs (20±2°C)
※4. 20°C-200°C, in conformity with JSCE-E536
※5. Creep failure load ratio measured at 1,000,000hrs, according to JSCE-E533 "Test method for creep failure of continuous fibers"
※6. Average stress is 75% of guaranteed breaking load, 2x106 cycles, according to JSCEE-535.

pu:The guaranteed breaking load


Characteristics of CFCC

Characteristics of CFCC - 1

Unique, Outstanding Capabilities of CFCC that surpass conventional cables
  • "CFCC" stands for Carbon Fiber Composite Cable.
  • CFCC is a stranded CFRP (Carbon Fiber Reinforced Polymer) which consists of twisted carbon fibers of approx. 7µm dia. and an epoxy resin.

Characteristics of CFCC - 2

CFCC makes the most of carbon fiber's excellent material properties, and shows the merits superior to conventional cables.
About 1/5 weight of steel strands, with specific gravity of 1.5
15m→2.3kg (CFCC 1x7 12.5Φ)
Thanks to the stranded configuration, CFCC can be easily winded into a coil or on a reel.
CFCC 1x7 12.5mm diameter 1,200m long, winded onto a wood reel (shell diameter: 1.2m).
High Corrosion Resistance
CFCC has superior resistance to acid and alkali.
CFCC is made from carbon fibers and an epoxy resin, thus is not magnetized.
Magnetic permeability
Material Relative magnetic permeability
CFCC Below 1.000*
Non magnetic PC steel (18Mn steel) 1.003
Iron core 1,200

* Due to the performance of magnetic analysis equipment, values less than 1.000 were immeasurable.

Low Linear Expansion
CFCC's coefficient of linear expansion is approx. 1/20 of steel.
Coefficient of linear expansion
Material Coefficient of linear expansion
CFCC 0.6x10-6/°C
Steel 12.0x10-6/°C
High Tensile Strength

Tensile strength of CFCC is 1.4 - 2.1kN/mm2.

High Tensile Elasticity

CFCC's tensile elastic modulus of 137kN/mm2 is higher than glass fibers or aramid fibers.

* CFCC 1x7 12.5mm dia.

High Tensile Fatigue Resistance

CFCC has higher tensile fatigue resistance in comparison with PC steel strands.

Low Relaxation

CFCC's relaxation ratio is on the same level as low relaxation PC steel strands.

Test specimen: CFCC 1x7 dia. 12.5mm, The initial load: 70% of guaranteed breaking load, The ambient temperature: 20°C±2°C)
Small Creep Elongation

CFCC's creep elongation is smaller than that of other FRP materials such as glass fibers or aramid fibers, and almost equal to steel cables.