CoNiChrome

Conichrome Alloy is a non-magnetic, austenitic alloy composed primarily of nickel, cobalt, chromium, and molybdenum. It offers a rare combination of exceptional strength, ductility, corrosion resistance, and superior fatigue performance—making it ideal for demanding, high-performance applications.

Produced through advanced melting and remelting processes, Conichrome achieves excellent purity and structural consistency. It is commonly used in industries requiring high strength and resistance to corrosive environments, including medical, energy, and chemical processing.

The alloy is annealed at 2000°F ±25°F (1093°C ±14°C), followed by controlled cooling to achieve a typical tensile strength of 125 KSI. When cold worked, Conichrome can be aged at 900°F–950°F (482°C–510°C) for enhanced mechanical properties.

Conichrome also demonstrates outstanding resistance to sulfide stress corrosion cracking and is approved for use under NACE MR0175 standards in a wide range of harsh production environments. Its long-standing use in medical implants reflects its biocompatibility and resistance to body fluids and tissue contact.

Conichrome Alloy can be cold formed or drawn, though it is stiffer than conventional stainless steels due to its high strength and rapid work hardening. Post-forming annealing is recommended when annealed properties are required in small sections.


CoNiChrome Inventory Size Ranges

Thin Gauge Strip

0.0008" - 0.015"

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CONICHROME BIO-COMPATIBILITY SUMMARY

Conichrome Alloy has a proven history of use in medical implants, where it is utilized in applications involving both soft tissue and bone contact. Its widespread acceptance in the medical industry is well documented, and biocompatibility data is readily available and recognized within the healthcare industry.


Standard Inventory Specifications

  • UNS R30003
  • UNS R30008
  • ASTM F1058 (Grade 1 or Grade 2)

Common Applications of CoNiChrome

  • Suture wires
  • Surgical clips
  • Pacemaker leads
  • Stents
  • Vena cava filters
  • Orthopedic nails
  • Precision springs
  • Torsion bars
  • Seals

Chemical Composition

CoNiChrome Alloy Chemical Composition
Element Percent by Weight
C Carbon 0.15% max
Co Cobalt 39.0% - 42.0%
Cr Chromium 18.5% - 21.5%
P Phosphorus 0.015% max
Be Beryllium 0.001% max
Mo Molybdenum 6.0% - 8.0%
Si Silicon 1.20% max
S Sulfur 0.015% max
Fe Iron Balance
Ni Nickel 14.0% - 18.0%
Mn Manganese 1.0% - 2.5% max
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Physical Properties of CoNiChrome

 
Density 0.300 lb/in³ 8304 kg/m³
Magnetic Properties This material is non-magnetic in its annealed, cold worked, and aged conditions.
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Mechanical Properties of CoNiChrome

Condition

0.2% Yield Strength

Ultimate Tensile Strength

% Elongation in 4D

% Reduction of Area

Orientation

Annealed

52 ksi

359 MPa

124 ksi

855 MPa

80

80

Long

Cold Worked

100 - 250 ksi

690 - 1724 MPa

150 - 280 ksi

1034 - 1930 MPa

 

 

Long

Cold Worked + Aged 

 

250 - 300+ ksi

1724 - 2068+ MPa

 

 

Long
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*The technical data provided is for information only and not for design purposes. It is not warranted or guaranteed.