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ASTM ASTM F75 CoCr Alloy Details

ASTM F75 CoCr is a non-magnetic Cobalt Chrome alloy exhibiting high temperature capability, strength, corrosion resistance, wear resistance as well as excellent biocompatibility.

CoCr alloys are widely used within the orthopedics, aerospace, power generation and the dental fields.


Machining

Parts produced using the Arcam EBM process demonstrate excellent machineability using any conventional machining process.

The F75 built material allow polishing to mirror-like finish for use as articulating surfaces in knee implants or other applications requiring superior surface finish.


Microstructure

Manufacturing CoCr parts with F75 results in fully dense parts without weld lines in the material before or after HIP treatment. The images show the typical microstructure after HIP treatment with different magnification. 

There is no porosity in both the horizontal and vertical cross sections

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Horizontal cross section at 50x and 500x magnification


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Vertical cross section at 50x and 500x magnification





ASTM ASTM F75 CoCr Alloy Standard Download

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ASTM F75 CoCr Alloy Application:CoCr alloys are widely used within the orthopedics, aerospace, power generation and the dental fields.
Category Type Grade Designations
Grades Superalloys ASTM F75 CoCr Alloy USA - ASTM , ASTM F75-2007 |
Chemical composition(mass fraction)(wt.%)
Elements Min.（≥） Max.（≤） Similar Remarks
C - 0.35
Si - 0.10
Mn - 1.00
P - 0.02
S - 0.01
Cr 27.00 30.00
Ni - 0.50
Mo 5.00 7.00
W - 0.20
Co - Bal
B - 0.01
Al - 0.10
Ti - 0.1
Fe - 0.75
N - 0.25
Mechanical properties of grade ASTM F75 CoCr Alloy
Proof strength
Rp0.2 (MPa)		 Tensile strength
Rm (MPa)		 Impact energy
KV (J)		 Elongation at fracture
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
959 (≥) 339 (≥) 13 23 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 133
Physical properties of grade ASTM F75 CoCr Alloy
Property Density
kg/dm3		 Temperature T
°C/F		 Specific heat
J / kgK		 Thermal conductivity
W/mK		 Electric resistance
µΩ·cm		 Modulus of elasticity
kN/mm2		 Expansion rate
348 (≥) 314 (≥) 13 41 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 322
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
927 755 988
ASTM F75 CoCr Alloy Range of products
Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED
Cross Reference Table(Equivalent Grade)
Grade Standard Country Application
NCF750 KS Korea
Corrosion - resisting and heat - resisting superalloy plates and sheets
NCF751 KS Korea
Corrosion - resisting and heat - resisting superalloy plates and sheets
NCF750 CNS China
CNS Standard heat resistant alloy and corrosion resistant alloy bar and plate type and chemical composition
NCF751 CNS China
CNS Standard heat resistant alloy and corrosion resistant alloy bar and plate type and chemical composition
ASTM F75 CoCr Alloy ASTM USA
CoCr alloys are widely used within the orthopedics, aerospace, power generation and the dental fields.