Cobalt Chrome Molybdenum Bar Stock - Chrome Moly Steel - ASTM F1537 Alloy 1

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We are suppliers of Cobalt Chrome Molybdenum (CCM) in round bar stock, commonly known as chrome moly steel, which is a non-magnetic, cobalt-chromium-molybdenum (Co-Cr-Mo) alloy used for machining and forging stock in the orthopedic implant industry.  CCM maintains excellent wear resistance and is biocompatible, making it an ideal material for surgical implants.  This material is commonly specified to ASTM F1537 Alloy 1 for forging and machining applications.   View our CCM Fact Sheet.

Cobalt Chrome Moly Inventory Size Ranges


0.250" - 2.000"

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Standard Inventory Specifications

  • ASTM F1537
  • ASTM F 1537 Alloy #1
  • UNS N06617

Common Trade Names

  • BioDur® Carpenter CCM® Alloy
  • CarTech® BioDur® CCM® Alloy

Common Applications of Cobalt Chrome Moly

  • Knee replacements
  • Hip replacement implants
  • Shoulder replacement implants
  • Spinal rods, cages and disc replacement
  • Fracture fixation

Our medical grade CCM round bar is domestically melted and produced by a leading global US manufacturer and is universally accepted by all major medical OEMs.

Chemical Composition of Cobalt Chrome Moly
Element Percent by Weight
Co Cobalt 66.00 max
Cr Chromium 27 max
Ni Nickel 0.2 max
Mo Molybdenum 5.5 max
C Carbon 0.04 max
- Other -

Physical Properties of Cobalt Chrome Moly

Physical Properties


0.2990 lb/in?

Poisson?s Ratio


Modules of Elasticity

(E) 35.0 x 10³ ksi  

Modules of Rigidity

(G) 13.4 x 10³ ksi

Specific Gravity


Mechanical Properties of Cobalt Chrome Moly


0.2% Yield Strength

Ultimate Tensile Strength

% Elongation in 4D

% Reduction of Area

HRC Hardness


85 ksi

585 MPa

150 ksi

1035 MPa




Warm Worked

135 ksi

930 MPa

190 ksi

1310 MPa




Hot Worked

110 ksi

760 MPa

160 ksi

1100 MPa




United Performance Metals is Approved ISO 13485 : 2016.  

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