Titanium Palladium Alloy Bar Grade 16 Grade 17 Grade 18

Titanium has excellent resistance to a variety of environments. Generally, titanium palladium alloy grades 7 and grade 11 extend the use of unalloyed titanium to more severe conditions. Grade 5, on the other hand, has slightly lower resistance than unalloyed titanium, but still performs well in many environments compared to other structural metals. Recently, ASTM incorporated a series of new titanium grades containing 0.05% palladium. (See Table 1 below.) These new titanium palladium grades show nearly the same corrosion resistance as the older 0.15% palladium grades but offer significant cost savings. We are pleased to offer these new titanium grades: Grade 16, Grade 17, and Grade 18.

Specification

Grade 16 titanium bar

Grade 16 titanium bar is an unalloyed titanium grade containing 0.04–0.08% Pd. This palladium-containing alloy extends the range of applications of commercially pure (CP) titanium in HCl, H3PO4, and H2SO4 solutions. Grade 16 titanium bar is used in applications requiring excellent corrosion resistance in chemical processing or storage applications where the medium is mildly reducing or fluctuates between oxidation and reduction. It can be used for continuous operating temperatures up to 425 °C (795 °F) and intermittent operating temperatures up to 540 °C (1000 °F).

Chemical Composition

Welding

The weldability of the 16-grade Ti-0.05Pd alloy was rated as very good. This alloy is a single-phase material, so the microstructure of the alpha phase is not affected by heat treatment or welding temperature

Annealing

Annealing of this material can be done by heating to 650-760°C (1202-1400°F) for 6 minutes to 2 hours followed by air cooling. If stress relief is required, the material must be heated to 480-595°C (896-1103°F) for 15 minutes to 4 hours and then air cooled.

Application

Grade 16 Ti-0.05Pd alloys are mainly used in chemical processing industrial applications. Titanium tubes are increasingly being used in a variety of applications due to the inefficiencies of stainless steel and other materials in many cases. A common titanium mill product is titanium tube, which is used in a variety of products due to its superior corrosion resistance and strength-to-weight ratio. The development of many different alloys has extended the use of titanium in the industrial and chemical processing range. Grades 7, 12, 16 or 26 can be used to make titanium pipes for areas requiring higher corrosion resistance. For example: oil pipe, welded pipe.

Grade 17 titanium bar

Grade 17 titanium bar has moderately high conductivity in wrought titanium. In addition, it has fairly low tensile strength and the highest thermal conductivity.

Chemical Composition

Annealing

Annealing of this material can be done by heating to 650-760°C(1202-1400°F) for 6 minutes - 2 hours and then air cooling. If stress relief is required, the material must be heated to 480-595°C (896-1103°F) for 15 minutes - 4 hours and then air cooled.

Application

Grade 17 Ti-0.05Pd alloys are mainly used in the chemical and marine industries due to their good corrosion resistance, and in fuselage structures due to their ease of forming.

Grade 18 titanium bar

Grade 18 titanium bar is the same as Grade 9 with the addition of palladium for improved corrosion resistance. The mechanical and physical properties, specifications, and forms are the same as those of Grade 9. The alloy composition differs by the addition of 0.04-0.08% Pd. Grade 18 contains 3% aluminum, 2.5% vanadium, and 0.04 to 0.08% palladium. This grade is identical to grade 9 in terms of mechanical properties. Added palladium makes it more resistant to corrosion. Grades 9 and 18 titanium have a density of 4.48 g/cc - less than 60% of steel.

Chemical Composition

Fabrication (typical values)

• Solderability - good

• Forging – Roughing 871-899°C (1600-1650°F), Finishing 843-871°C (1550-1600°F)

• Annealing – 593-760°C (1100-1400°F), 1-3 hours, AC

• Solution Processing – 871-927 °C (1600-1700°F), 15-20 minutes, water temp.

• Aged – 482-510 °C (900-950°F), 2-8 hours, AC.

• Stress Relief Annealing – 316-649°C (600-1200°F), 1-3 hours, AC.

Application

It is used in a wide range of applications due to their high strength, corrosion resistance, and biocompatibility. Below are some common applications for titanium palladium grades:

• 1. Marine equipment, such as propeller shafts, valves, and fasteners, due to its resistance to saltwater corrosion.
• 2. Chemical processing equipment, including heat exchangers and reactors, due to its resistance to high concentrations of chloride.
• 3. Aerospace applications, such as aircraft components and gas turbine parts, due to its high strength and corrosion resistance.

• 4. Marine equipment, such as propeller shafts and heat exchangers, due to its resistance to saltwater corrosion.

Again, it's important to note that the specific applications of each grade can vary depending on the exact composition and manufacturing process. It's always best to consult with a materials expert or the manufacturer to determine which grade is best suited for your particular application.

Hot Tags: