Co — Properties & Data | MatWorld

Co

metal

· Co

Cobalt (Co) is a ferromagnetic transition metal known for its high strength, excellent wear resistance, and superior performance at elevated temperatures. It is widely used in superalloys, magnetic applications, and wear-resistant coatings where conventional steels cannot survive extreme conditions. Engineers select cobalt-based materials for demanding aerospace and industrial applications where thermal stability, fatigue resistance, and corrosion resistance are critical, though cost and density are considerations relative to alternatives like nickel-based systems.

aircraft turbine blades and diskshigh-temperature superalloysmagnetic materials and permanent magnetswear-resistant coatings and cutting toolsbiomedical implantschemical processing equipment

Compliance & Regulations

?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)2 entries	210.6	GPa	DFT · OptB88vdW
↳	211.6	GPa	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	1.112	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	Pa	DFT · PBE
Poisson's Ratio(ν)2 entries	0.2400	-	DFT · OptB88vdW
↳	0.2929	-	DFT · PBE
Shear Modulus(G)2 entries	135.7	GPa	DFT · OptB88vdW
↳	101.7	GPa	DFT · PBE

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Density(ρ)	9.035	kg/m³	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions
Band Gap(Eg)	0.000	eV	DFT · OptB88vdW
Dielectric Constant (Relative Permittivity)(εr)	1.802	-	DFT · OptB88vdW
Magnetic Moment(μB)	1.612	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.06141	C/m²	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	0.02093	eV/atom	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data

Regulatory Screening

Environmental

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RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.

Co

Mechanical Properties

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Regulatory Screening

Environmental

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