Titanium Grade 7 Welding Wire

Titanium grade 7 welding wire:

The data shows that the corrosion resistance of Gr7 titanium (Ti-0.2Pd) in reducing media is significantly better than that of industrial pure titanium, and the welding zone of Ti-0.2Pd has the same corrosion resistance as the base material. Compared with de-aired hydrochloric acid in air-filled hydrochloric acid, Gr7 titanium (Ti-0.2Pd)  has a significant positive shift in the stable potential, and the corrosion rate can be reduced by 10 times. However, in an acid solution filled with argon or nitrogen, new corrosion solutions or unit area tests are constantly replaced When the volume of the same solution increases, the passivation performance of Ti-0.2Pd will be significantly reduced, so it should be avoided to use Gr7 titanium (Ti-0.2Pd) in the absence of oxygen or oxidizer. Adding a small amount of palladium to the TA9 titanium alloy improves the oxidizing medium In the corrosion resistance, especially the ability to resist crevice corrosion. Therefore, it is widely used in the corrosive medium of hydrochloric acid, sulfuric acid, phosphoric acid, nitric acid and chloride.

Product Information:

Product name: Titanium grade 7 welding wire

Standard : AWS a5.16 , ASME SFA 5.16

Grade : GR7 (ErTi-7,Ti-0.2Pd )

Diameter : 1.0mm 1.2mm 1.6mm 2.0mm 2.4mm 3.2mm etc.

Shape : Coil,spool,straight.

Surface : Pickling surface/bright surface

Application : Welding

Titanium Grade 7 welding wire is specifically designed for welding applications where high corrosion resistance is required:

Composition: Titanium Grade 7, also known as Ti-0.15Pd, is a commercially pure titanium alloy with palladium added. It typically contains about 0.12-0.25% palladium and small amounts of other elements such as iron, oxygen, and hydrogen.

Properties: Grade 7 titanium exhibits excellent corrosion resistance in reducing and mildly oxidizing environments. It is similar to Grade 2 titanium but with enhanced resistance to corrosion in chemical environments, particularly where crevice corrosion and stress corrosion cracking are concerns.

Weldability: Titanium Grade 7 welding wire is designed to be weldable using common welding techniques suitable for titanium alloys, such as gas tungsten arc welding (GTAW or TIG welding) and gas metal arc welding (GMAW or MIG welding). Proper welding procedures must be followed to ensure high-quality welds and to prevent contamination, which could affect the corrosion resistance of the material.

Applications: The use of Grade 7 titanium welding wire is common in industries where corrosion resistance is critical, such as chemical processing, marine environments, and medical applications. It is also used in aerospace applications where lightweight, corrosion-resistant materials are required.

Certification and Standards: Titanium welding wire, including Grade 7, should meet specific standards and certifications depending on the application requirements. These may include ASTM specifications such as ASTM B863 for titanium and titanium alloy wire, and AWS (American Welding Society) standards for welding procedures.

Handling and Storage: Titanium welding wire must be handled and stored properly to prevent contamination and maintain its properties. This includes protecting it from moisture, dust, and other contaminants that could affect weld quality and corrosion resistance.

Supplier and Specifications: When sourcing Titanium Grade 7 welding wire, ensure it meets the required specifications and standards for your application. Suppliers of titanium materials typically provide technical data sheets outlining composition, mechanical properties, and recommended welding procedures.

Titanium Grade 7 Wire Applications:

Titanium Grade 7 welding wire finds application in various industries where its specific properties are advantageous. Here are some common applications:

Chemical Processing:

Titanium Grade 7 is highly resistant to corrosion in chemical environments, particularly where acids, chlorides, and other corrosive chemicals are present. Welding wire made from Grade 7 titanium is used in the construction of chemical processing equipment such as tanks, piping, valves, and heat exchangers.

Marine Environments:

Due to its excellent resistance to seawater corrosion and marine atmospheres, Grade 7 titanium welding wire is utilized in marine applications. This includes the fabrication of offshore structures, seawater desalination plants, and marine components exposed to harsh saltwater conditions.

Medical Equipment and Devices:

Titanium Grade 7 is biocompatible and resistant to corrosion in bodily fluids, making it suitable for medical applications. Welding wire made from Grade 7 titanium is used in the fabrication of surgical implants, medical instruments, and prosthetic devices where long-term performance and biocompatibility are essential.

Aerospace Industry:

Titanium alloys, including Grade 7, are valued in aerospace applications due to their high strength-to-weight ratio and resistance to corrosion. Grade 7 welding wire is used in the manufacture and repair of aircraft components, structural parts, and critical aerospace systems where durability and reliability are crucial.

Pulp and Paper Industry:

In the pulp and paper industry, where corrosive chemicals and high temperatures are common, Grade 7 titanium welding wire is employed in the construction of equipment such as digester vessels, bleach towers, and piping systems. Its corrosion resistance helps in extending the operational life of these components.

Oil and Gas Industry:

Titanium Grade 7 welding wire is utilized in the oil and gas industry for applications requiring resistance to corrosive environments, such as offshore platforms, pipelines, and processing equipment exposed to seawater, brines, and acidic fluids.

Desalination Plants:

Titanium Grade 7 is suitable for use in desalination plants where it is exposed to highly saline environments. Welding wire made from Grade 7 titanium is used in the fabrication of heat exchangers, evaporators, and other components critical to the desalination process.