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Titanio

PROPIEDADES MECANICAS DEL TITANIO

Comparacion Ratio Resistencia/Densidad de distintas aleaciones con el Titanio

Material	Limite elastico a 20°C MPa	Densidad kg/I	Resistencia/Peso ratio a 20°C	Resistencia/Peso Comparado con
			M Pa/kg/I	Grado 2 TI	Grado 5 TI
Titanio Gr 2,7,16	275	4,51	61	100	33
Titanio Gr 9, 18	485	4,48	108	177	58
Titanio Gr 23, 29	759	4,42	172	281	92
Titanio Gr 32	586	4,43	132	216	70
Titanio Gr 5, 24	828	4,42	187	307	100
Acero Inoxidble 13%Cr AISI 410	350	7,72	45	74	24
Acero Inoxidble 316L	173	7,94	22	36	12
Acero Inoxidble 6%Mo-254SMO	300	8,00	38	62	20
Duplex S/S SAF 2505 ASTM A699	450	7,80	58	95	31
Super Duplex S/S SAF 2507	550	7,80	70	115	37
Monel *400	200	8,83	23	38	12
Inconel *625	415	8,44	49	80	26
Cobre Niquel 90-10	90	8,90	10	16	5
Bronce AB2	250	7,95	31	51	17

Caracteristicas de las Aleaciones de Titanio

Caracteristicas	Unidades	CP Titanium	Ti-6AI-4V ELI	Ti-3AI-2.5V	Ti-5111
ASTM Grade		Grado 2	Grado 23 (29)	Grado 9 (18,28)	Grado 32
UNS ref		R50400	R56407 (04)	R56320 (22,23)	R55111
Alloy type		Alpha	Alpha/beta	Lean alphalbeta	Lean alpha/beta
0.2% Proof Stress	MPa	275	760 - 900	500 - 800	680 - 800
UTS	MPa	345	830 - 1000	620 - 950	750 - 900
Elongation	%	20	10 - 15	10 - 20	10 - 20
Tensile Modulus	GPa	103 (Tube 110)	110-115	91 - 105	109-112
Torsion Modulus	GPa	45	40 - 43	34 - 39	42 - 44
Density	kgll	4.51	4.42	4.47	4.51
Thermal Expansion	10 6 /K	8.9	8.3	8.1	8.2
Thermal Conductivity	W/mK	18.6	6.7	7.1	7.5
Specific Heat	J/KglK	519	565	540	533

Resistencia a la corrosion entre el Titanio y otras Aleaciones

Tipo de Corrosion	Copper based alloys	Stainless Steel 316	Stainless Steel 6 Mo and Duplex	Titanium Alloys
Corrosion General	Resistente/Susceptible1	Resistente	Resistente	Resistente
Crevice Corrosion	Susceptible	Susceptible	Susceptible (> 25°C)	Resistente (80 ° C)2
Pitting Attack	Susceptible	Susceptible	Resistente	Irnmune
Stress Corrosion	Susceptible1	Susceptible (> 60°C)	Resistente	Resistente 3
Corrosion Fatigue	Susceptible	Susceptible	Susceptible	Inmune
Galvanic Attack	Susceptible	Susceptible	Resistente	Inmune
Microbiologica	Susceptible	Susceptible	Susceptible	Inmune
Weld/HAZ Corrosion	Susceptible	Susceptible	Susceptible	Resistente
Corrosion Erosion	Susceptible	Resistente	Resistente	Altamente Resistente

Dependent on pollution levelsea water chemistry
Grades 7,11,12,16,17,20,21,24,28,29 Resistente to at least 200°C
Standard Grade 5 has finite susceptibility, Grade 23 (ELI) has improved K.1scc values

Prestaciones del Titanio ante distintos Fluidos

	Aleacion
Fluido	Grade 5, 23	Grade 9	Grade 24,29 1	Grade 18,28
Methanol + x%water (see table page 23)	R> 10%	R>3%	R> 10%	R>3%
Amine Inhibitors	R	R	R	R
Glyco ls	R	R	R	R
Hydraulic Fluids	R	R	R	R
Hydrate Inhibitors	R2	R2	R2	R2
Scale Inhibitors	R	R	R	R
Paraffin Inhibitors	R	R	R	R
Emulsion Inhibitors	R3	R3	R3	R3
12% Hydrochloric + 3% Hydrofluoric Acid	S3	S3	S3	S3
15 % Hydrochloric Acid (HCl)	S3	S3	S3	S3
10 -12%HCl Sodium Molybdate inhibited	R	R	R	R
10%Acetic Acid	R	R	R	R
10%IOrmic acid	S	S	R	R
1. Also Grade 23 + .05 % Pd	R = Resistente al ataque			S = Susceptible de ataque
2. Require > 2%wt ofwater to avoid methanolic SCC in some commercialproducts
3. Severe uniform corrosion and hydrogen absorption DO NOT USE WITH TlTANIUM