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Kovar chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Kovar

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UNS Kovar

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This page is mainly introduced the Kovar chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of Kovar,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Iron-Nickel-Cobalt Alloy, Bars and Forgings, 53Fe - 29Ni - 17Co, Low Expansion, Glass Sealing

Steel Garde:Kovar
Type:Stainless Steels
Country:USA
Standard:UNS
Standard Number:

ITEM Standard Number Descriptions

1 SAE AMS 7727E (2000) Iron-Nickel-Cobalt Alloy, Bars and Forgings, 53Fe - 29Ni - 17Co, Low Expansion, Glass Sealing
Metallographic Structure:Precipitation-Hardening
Application:Iron-Nickel-Cobalt Alloy, Bars and Forgings, 53Fe - 29Ni - 17Co, Low Expansion, Glass Sealing

ITEM	Standard Number	Descriptions
1	SAE AMS 7727E (2000)	Iron-Nickel-Cobalt Alloy, Bars and Forgings, 53Fe - 29Ni - 17Co, Low Expansion, Glass Sealing

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
Kovar	ASTM	USA
Kovar	ASTM	USA
Kovar	ASTM	USA
Kovar	UNS	USA
Kovar	UNS	USA
Kovar	UNS	USA
Kovar	UNS	USA

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）	Similar	Remarks
C		0.04
Si		0.20
Mn		0.50
Ni		29.00
Cr		0.20
Al		0.10
Cu		0.20
Ti		0.10
Fe		53.00
Mo		0.20
Co		17.00
W
Mg		0.10
Zr		0.10

Mechanical Properties

Tensile strength	626～838	σb/MPa
Yield Strength	920	σ 0.2 ≥/MPa
Elongation	96	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	277～581	-
HRC	30	-

Physical Properties

Thermal expansion	07-66	e-6/K
Thermal conductivity	84-38	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	7267-5948	째C
Density	5561-7851	kg/m³
Resistivity	0.50-0.60	Ohm.mm²/m

Heat Treatment Regime

Annealing	Quenching	Tempering	Normalizing	Q & T
√	√	√	√	√

Size Availability

Steel Grade	Specification	Processing range(mm)
Kovar Stainless Steels	Round Bar and Hollow Bar	Φ1 to Φ2000
	Square and Flat Steel	Φ10 to Φ100
	Plate and Sheet	0.08-800(Thickness)10-1500(Width)Length
	Tube or Pipe	OD:Φ4-410; WT:1-35 mm; Lenght:10-12000
	Coil and Strip Steel	THK:0.1mm Width:1500mm
	Forged	Ring/Cylindrical/Disk