Grade 704 Zirconium (Zr-1.5Sn)

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Grade 704 Zirconium (Zr-1.5Sn)
Categories:	Metal; Nonferrous Metal; Zirconium Alloy
Material Notes:	Characteristics: Contains halfnium Mechanical Properties similar to pure zirconium, stronger and less ductile Excellent corrosion resistance Forms a stable, dense, self-healing oxide layer Highly anisotropic Applications: Chemical processing equipment Machining Parameters: Use slow speeds, heavy feeds and flood cooling with a water-soluble oil lubricant.
Key Words:	UNS R60704, Zircadyne® 704
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Physical Properties	Original Value	Comments

Density	6.56 g/cc

Mechanical Properties	Original Value	Comments
Tensile Strength, Ultimate	>= 413 MPa
	220 MPa @Temperature 400 °C
	260 MPa @Temperature 300 °C
	360 MPa @Temperature 200 °C
	480 MPa @Temperature 100 °C
	530 MPa @Temperature 20.0 °C
Tensile Strength, Yield	120 MPa @Temperature 400 °C
	140 MPa @Temperature 300 °C
	190 MPa @Temperature 200 °C
	280 MPa @Temperature 100 °C
	360 MPa @Temperature 20.0 °C
	>= 241 MPa @Strain 0.2 %
Elongation at Break	14 %	in 50 mm
	22 % @Temperature 20.0 °C
	26 % @Temperature 100 °C
	32 % @Temperature 200 °C
	34 % @Temperature 400 °C
	38 % @Temperature 310 °C
Modulus of Elasticity	99.3 GPa
Poissons Ratio	0.37
Shear Modulus	36.2 GPa

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000740 ohm-cm

Thermal Properties	Original Value	Comments
CTE, linear	6.00 µm/m-°C @Temperature 25.0 °C
Specific Heat Capacity	0.285 J/g-°C
Thermal Conductivity	21.5 W/m-K
Melting Point	1850 °C
Boiling Point	4375 °C

Component Elements Properties	Original Value	Comments
Fe + Cr	0.30 %
Hafnium, Hf	<= 4.5 %
Oxygen, O	0.18 %
Tin, Sn	1.5 %
Zirconium, Zr	>= 97.5 %	includes Hf

Descriptive Properties
Alpha Phase Crystal Structure	hcp	< 865°C
Beta Phase Crystal Structure	bcc	> 865°C

References for this datasheet.

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MZRI10 / 14571

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