AWS Class ERTI-9 MIG & TIG
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ERTi-9 TIG Filler Rod & MIG Wire Supplier in Mumbai, India
Nicorex Alloys is an ISO 9001 and ISO 14001 certified stockist and supplier of ERTi-9 titanium welding wire (Ti-3Al-2.5V), classified under AWS A5.16 / ASME SFA-5.16. We supply high-quality ERTi-9 TIG Filler Rod & MIG wire.
ERTi-9 is a highly specialised alpha-beta titanium alloy filler wire, containing 3% aluminum and 2.5% vanadium, which is well accepted by the industry as Grade 9 titanium. The chemical composition is carefully formulated to provide an ideal combination of high ductility, excellent cold formability, and guaranteed weldability. ERTi-9 weld metal, according to AWS A5.16, is reported to have a tensile strength of 620 MPa (90,000 psi) with 14% elongation, thus making it suitable for critical structural use. The alloy is available in TIG rods and MIG spools, with GTAW and GMAW processes using DCEN and DCEP, respectively, together with 100% UHP argon shielding. To maintain metallurgical integrity and prevent atmospheric contamination or embrittlement, the use of a back purge and an extended trailing shield is mandatory. These protective measures must remain active until the weldment has cooled safely below the critical threshold of 427°C (800°F) to ensure maximum performance and joint longevity in demanding environments.
Nicorex Alloys stocks and distributes materials and provides ERTi-9 for various uses, including aircraft hydraulic tubing, pressure vessels under ASME Section VIII, oil and gas production tubing, aerospace foils, and sports equipment. Base metals include Titanium Grade 9 (P-52), Grade 18, Grade 28, and Grade 2 (P-51). Every consignment ships with an EN 10204/3.1B mill test certificate.
ERTi-9 Titanium Welding Wire Specifications
Refer to the following table for a comprehensive overview of technical standards and industrial specifications for ERTi-9 titanium wire.
| AWS Classification | ERTi-9 as per AWS A5.16 / A5.16M |
|---|---|
| UNS (Base Metal) | R56320 |
| Welding Processes | GTAW (TIG), GMAW (MIG), PAW |
| Polarity | (GTAW): DCEN (GMAW): DCEP |
| Shielding Gas | 100% Argon (99.995% min UHP) or Ar/He |
| TIG Rod Diameters | 0.9, 1.6, 2.4, 3.2 mm |
| MIG Wire Diameters | 0.8, 0.9, 1.2 mm |
| TIG Rod Length | 914 mm (36″) or 1000 mm |
| MIG Spool Sizes | 5 kg, 10 kg (D200/D300) vacuum-sealed |
What Does ERTi-9 Mean? - AWS A5.16 Classification Explained
Consult the table below for a breakdown of the AWS A5.16 alphanumeric system defining this specific titanium grade.
| Prefix / Designator | Meaning & Technical Significance |
|---|---|
| ER | Electrode / Rod: Bare solid wire suitable for both TIG (GTAW) and MIG (GMAW) processes. |
| Ti | Titanium: Indicates the base metal chemistry is titanium-based. |
| 9 | Grade 9 Alloy: An alpha-beta alloy (Ti-3Al-2.5V) where aluminium adds strength and vanadium ensures workability. |
High-performance titanium alloy filler material ERTi-9 is Ti-3Al-2.5V with 620 MPa tensile strength. Material weldability and formability are better than Grade 5. This makes it ideal for aeronautical hydraulics and racing frames.
Weld Deposit Chemical Composition of ERTi-9
Please see the following data for the precise elemental percentages and purity levels required for ERTi-9 weld deposits.
| Specification | Carbon (C) | Oxygen (O) | Nitrogen (N) | Hydrogen (H) | Iron (Fe) | Palladium (Pd) | Titanium (Ti) |
|---|---|---|---|---|---|---|---|
| AWS A5.16 Req. (%) | 0.03 max | 0.08–0.16 | 0.015 max | 0.008 max | 0.12 max | 0.12–0.25 | Remainder |
2.5–3.5% Al strengthens the alpha phase; 2.0–3.0% V promotes a small beta fraction for cold-workability. Hydrogen is capped at 0.005% max, tighter than ERTi-2’s 0.008% limit, due to higher susceptibility to hydrogen embrittlement in the alpha-beta microstructure.
All-Weld-Metal Mechanical Properties of ERTi-9
Direct your attention to this table for the typical tensile strength, yield strength, and elongation metrics of ERTi-9.
| Specification | Tensile Strength | Yield Strength | Elongation |
|---|---|---|---|
| AWS A5.16 Minimum | 620 MPa (90,000 psi) | 483 MPa (70,000 psi) | 14% |
Base Metal Compatibility and P-Number Matrix for ERTi-9
Review the following compatibility guide for the various titanium alloys and ASME P-Numbers suitable for ERTi-9 filler metal.
| Base Metal | UNS | ASME P-No. | Joint Type |
|---|---|---|---|
| Titanium Grade 9 (Ti-3Al-2.5V) | R56320 | P-52 | Similar — primary application |
| Titanium Grade 18 (Ti-3Al-2.5V-0.05Pd) | R56322 | P-52 | Similar — Pd-enhanced variant |
| Titanium Grade 28 (Ti-3Al-2.5V-0.1Ru) | R56323 | P-52 | Similar — Ru-enhanced variant |
| Titanium Grade 2 (CP) | R50400 | P-51 | Dissimilar — ERTi-2 often preferred |
For Grade 9 base metal, both ERTi-9 and ERTi-2 are used. ERTi-9 provides matching strength (620 MPa); ERTi-2 provides an undermatched but more ductile deposit (345 MPa, 20% elongation). ERTi-9 should not be used for Grade 5 (Ti-6Al-4V) joints.
Recommended Welding Parameters for ERTi-9 TIG & MIG Wire
The table below provides optimised current and voltage settings for achieving high-quality results with ERTi-9 welding consumables.
| Rod Diameter | Amperage (A) | Voltage (V) | Gas Cup | Argon (cfh) | Base Thickness |
|---|---|---|---|---|---|
| 1.6 mm (1/16″) | 100–185 | 9–12 | 1/2″ | 20 | 1.6–3.2 mm |
| 2.4 mm (3/32″) | 150–250 | 11–15 | 5/8″ | 25 | 3.2–4.8 mm |
| 3.2 mm (1/8″) | 200–375 | 11–15 | 3/4″–1″ | 30 | 6.3–12.7 mm |
GMAW (MIG) parameters: DCEP, short-circuit transfer.
| Wire Diameter | Amperage (A) | Voltage (V) | Wire Speed (ipm) | Argon / Ar+He (cfh) |
|---|---|---|---|---|
| 0.8 mm (0.030″) | 100–195 | 16–20 | 450–650 | 35–65 |
| 0.9 mm (0.035″) | 165–285 | 18–27 | 480–420 | 35–65 |
| 1.2 mm (0.045″) | 250–360 | 31–35 | 500–880 | 35–65 |
Use only 100% Argon (99.995% min) or Ar/He. Never use CO₂, O₂, or N₂. Back purge mandatory. Trailing shield required until below 427°C (800°F). Interpass max 175°C (350°F). Colour inspection: silver/bright = acceptable; straw/light gold = marginal; blue/dark blue = contaminated (reject); grey/white = severely contaminated (reject, grind out).
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Industrial Applications of Titanium Grade 9 (ERTi-9) Filler Wire
The following are ERTi-9 (Grade 9 Titanium) Industrial Applications
- Aircraft Hydraulic Systems: The standard for engine tubing. The material is capable of withstanding high internal pressure and supports geometric configurations in aircraft structures.
- Pressure Vessels & Piping: Used for chemical and oil gas containers. It provides strong, reliable seals that match the strength of the titanium tanks.
- Oil & Gas Production: Essential for deep-well tubing. It stops corrosion from saltwater and gases, removing the need for expensive chemical treatments to protect pipes.
- Aerospace Components: Used in aircraft ducting and structural foils. Its unique flexibility allows it to be welded into complex shapes without the metal cracking.
- Sports Equipment: The top choice for professional bicycle frames and golf clubs. It offers a lightweight feel with extreme durability and a smooth finish.
- Geothermal Energy: Used in power plant piping. It survives constant contact with boiling steam and salt without rusting or thinning over time.
Storage and Handling of Titanium ERTi-9 Welding Wire
Alpha-beta titanium alloys are more sensitive to interstitial pickup than CP grades. Keep wire in original sealed packaging; reseal immediately after use. Store at 15–35°C, below 60% RH, separated from ferrous materials and copper alloys. Clean rods with acetone before use and handle with lint-free gloves. ERTi-9 bare wire does not require re-baking.
Available Forms, Diameters & Packaging of ERTi-9 Welding Wire and Rod
Check the following list for the various diameters, spool sizes, and rod lengths available for purchasing ERTi-9 materials.
| Form | Diameters | Packaging |
|---|---|---|
| TIG Rod (GTAW) | 0.9, 1.6, 2.4, 3.2 mm | 5 kg sealed tubes, 914 or 1000 mm cut lengths |
| MIG Spool (GMAW) | 0.8, 0.9, 1.2 mm | 5 kg, 10 kg vacuum-sealed spools (D200/D300) |
How to Order ERTi-9 (Ti-3Al-2.5V) Welding Filler Metal from Nicorex Alloys
To place an order for ERTi-9 (Ti-3Al-2.5V) Welding Filler Metal from Nicorex Alloys please provide the following 10 details
- Wire Type - GTAW AWS A5.16 ERTi-9
- Size: 1.6mm, 2.4mm, 3.2mm cut lengths
- Current Type: DCEN + 99.99% Argon shielding gas
- Welding Position: All positions
- Material Grade: Ti-3Al-2.5V / UNS R56320 / ERTi-9 / 3.7195 / ISO 24034
- Quantity: 5kg rigid tubes
- Standard: AWS A5.16 / ASME SFA 5.16
- Documentation: MTC EN 10204 3.1, NACE MR0175
- Packaging: Rigid tubes, PMI Report included
- Delivery Destination: International / Port of Mumbai
Nicorex Alloys can supply matching ERTi-9 TIG rods and MIG wire from the same certified heat. The full range from ERTi-1 through ERTi-12 is available from stock.
Frequently Asked Questions
What is the Price of ERTi-9 Titanium Welding Wire per kg in India?
ERTi-9 pricing depends on diameter, form, order quantity, and titanium market rates. Contact Nicorex Alloys for a quotation.
Why is ERTi-9 the Standard Filler for Aircraft Hydraulic Tubing?
After welding, aviation hydraulic tubes must be bent through complex geometries at 3,000-8,000 pressure. ERTi-9 meets pressure requirements with its 620 MPa tensile strength and 14% elongation for post-weld cold bend. When bent, ERTi-5 cracks at 895 MPa. AMS 4943/4944/4945 is a Grade 9 hydraulic tube.
Can ERTi-2 be used instead of ERTi-9 to Weld Grade 9 Base Metal?
Yes. ERTi-2 is commonly used for Grade 9, where maximum weld ductility matters. Its deposit (345 MPa, 20% elongation) is undermatched but allows post-weld bending without cracking. When matching strength is required per ASME Section VIII, use ERTi-9.
What Spool Sizes and TIG Rod Lengths are Available for ERTi-9?
We supply TIG rods in 0.9, 1.6, 2.4, and 3.2 mm sizes within 5 kg tubes at 914 or 1000 mm lengths. Our MIG wire comes in 0.8, 0.9, and 1.2 mm on vacuum-sealed 5 kg or 10 kg spools, always including full MTC 3.1 certification.
When should ERTi-9 Welding Wire not be used?
Do not use ERTi-9 for Grade 5 (Ti-6Al-4V) joints; use ERTi-5 or ERTi-23 instead. Avoid for reducing acid service; use ERTi-7 or ERTi-12. For severe cold-forming at tight bend radii, ERTi-2 (20% elongation) may be preferred. Never use CO₂, O₂, or N₂ shielding.