Titanium Grade 12

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Titanium Grade 12
Categories:	Metal; Nonferrous Metal; Titanium Alloy; Unalloyed/Modified Titanium
Material Notes:	Addition of 0.3% Mo and 0.8% Ni to titanium increases corrosion resistance at a lower cost than Pd (see Ti Grades 7 and 11). Higher strength than unalloyed Ti grades 1 - 4, yet still formable. Microstructure: Equiaxed alpha, with acicular alpha, primarily in welds or heat-affected zones, small amounts of beta. Applications: Chemical processing, in mildly reducing or variable oxidizing-reducing media - containers, heat exchangers, pumps, valves, pipes and fittings. Forms typically available: billet, bar, rod, plate, sheet, strip and tubing. Titanium Grades 1,2,3,4,7,11,and 12 are all considered unalloyed and have similar mechanical properties.
Key Words:	UNS R53400; ASTM Grade 12, titanium alloy
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Physical Properties	Original Value	Comments

Density	4.50 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Brinell	180 - 235
Hardness, Knoop	222	Estimated from Brinell.
Hardness, Rockwell C	11	Converted from Brinell hardness. Value below normal HRC range, for comparison purposes only.
Hardness, Vickers	209	Estimated from Brinell.
Tensile Strength	550 MPa	Weld strength in 13 mm plate
	325 MPa @Temperature 316 °C
	345 MPa @Temperature 240 °C
	510 MPa @Temperature 25.0 °C
Tensile Strength, Ultimate	450 MPa
Tensile Strength, Yield	380 MPa
	205 MPa @Temperature 316 °C	0.2% offset
	250 MPa @Temperature 240 °C	0.2% offset
	415 MPa @Temperature 25.0 °C	0.2% offset
Elongation at Break	12 %	Weld elongation in 13 mm plate
	32 % @Temperature 316 °C
	33 % @Temperature 25.0 °C
	37 % @Temperature 240 °C
Creep Strength	48.0 MPa @Temperature 315 °C, Time 1.80e+7 - 3.60e+7 sec	Creep strain rate 0.0000033 %/hour
	138 MPa @Temperature 315 °C, Time 1.80e+7 - 3.60e+7 sec	Creep strain rate 0.0000186 %/hour
	138 MPa @Temperature 25.0 °C, Time 1.80e+7 - 3.60e+7 sec	Creep strain rate 0 %/hour
	331 MPa @Temperature 25.0 °C, Time 1.80e+7 - 3.60e+7 sec	Creep strain rate 0.0000394 %/hour
Tensile Modulus	105 GPa
Compressive Modulus	110 GPa
Poissons Ratio	0.37
Fatigue Strength	160 MPa @# of Cycles 100000	Reverse bending, 1.3mm sheet, notched (K_t = 3.5)
	345 MPa @# of Cycles 1.00e+6	Reverse bending, 1.3mm sheet
Shear Modulus	45.0 GPa
Charpy Impact	15.0 J

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000520 ohm-cm

Thermal Properties	Original Value	Comments
Heat of Fusion	325 J/g	High Purity Ti.
CTE, linear	8.60 µm/m-°C @Temperature 0.000 - 100 °C
	9.50 µm/m-°C @Temperature 0.000 - 315 °C	average
Specific Heat Capacity	0.555 J/g-°C @Temperature 23.0 °C
	0.670 J/g-°C @Temperature 540 °C
Thermal Conductivity	19.0 W/m-K	annealed
Melting Point	<= 1660 °C
Liquidus	1660 °C
Maximum Service Temperature, Air	425 °C	Continuous use
	540 °C	Intermittent Use
Beta Transus	890 °C

Optical Properties	Original Value	Comments
Emissivity (0-1)	0.30 @Temperature 710 °C	High purity Ti
Reflection Coefficient, Visible (0-1)	0.56	High purity Ti; visible light.

Component Elements Properties	Original Value	Comments
Carbon, C	<= 0.080 %
Hydrogen, H	<= 0.015 %
Iron, Fe	<= 0.30 %
Molybdenum, Mo	0.20 - 0.40 %
Nickel, Ni	0.60 - 0.90 %
Nitrogen, N	<= 0.030 %
Other, each	<= 0.050 %
	<= 0.050 %
Other, total	<= 0.30 %
	<= 0.30 %
Oxygen, O	<= 0.25 %
Titanium, Ti	97.725 - 99.2 %	As Balance; Elemental Composition per ASTM B265

References for this datasheet.

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