AWS Class ERTi-5 MIG & TIG
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ERTi-5 (Titanium Grade 5) TIG Filler Rod & MIG Wire Supplier in India
Nicorex Alloys is an ISO 9001- and ISO 14001-certified Mumbai-based stockist and supplier of ERTi-5 (Ti-6Al-4V) titanium welding wire. We provide these wires classified under AWS A5.16 / ASME SFA-5.16 and AMS 4954.
ERTi-5 (UNS R56400) is a high-strength, 6% Aluminum-4% Vanadium titanium filler metal used for welding Grade 5 alloys.Ti-6Al-4V accounts for over 50% of global titanium alloy usage, and ERTi-5 filler rod is its matching welding consumable. The alpha-beta microstructure, formed by 6% aluminium (alpha stabiliser) and 4% vanadium (beta stabiliser), delivers the highest strength-to-weight ratio of any filler wire in the A5.16 family. ERTi-5 (Ti-6Al-4V) titanium welding wire deposits reach a minimum tensile strength of 895 MPa (130 ksi) and yield strength of 828 MPa (120 ksi) with 10% elongation at a density of only 4.43 g/cm³. The wire suits GTAW (TIG), GMAW (MIG), PAW, EBW, and LBW processes, all requiring 100% ultra-high-purity argon shielding with mandatory back purge and trailing shield.
Nicorex Alloys stocks ERTi-5 TIG rods from 1.0 to 3.2 mm and MIG spools in 0.9 and 1.2 mm. The related ELI variant, ERTi-23, serves medical implant and cryogenic applications with tighter interstitial limits. Industries served include aerospace, defence, medical prosthetics, motorsport, oil and gas, and chemical processing. Every shipment includes EN 10204 3.1B test certificates showing full interstitial content and aluminium/vanadium (Al/V) analysis.
AWS A5.16 ERTi-5 Welding Wire Specifications
The specifications of ERTi-5 welding wire covering classification, weld process data, shielding, and more are listed below.
| AWS Classification | ERTi-5, AWS A5.16 |
|---|---|
| UNS Number | R56400 |
| Welding Processes | GTAW (TIG), GMAW (MIG), PAW, EBW, LBW |
| Polarity — GTAW / GMAW | DCEN / DCEP |
| Shielding Gas | 100% Argon UHP (99.995%) + back purge + trailing shield |
| TIG Rod Diameters | 1.0, 1.6, 2.0, 2.4, 3.2 mm |
| MIG Wire Diameters | 0.9, 1.2 mm |
AWS Classification Explained: What Does ERTi-5 Mean?
The AWS classification of ERTi-5 TIG Filler Rod & MIG wire, along with its designation and meaning, is listed below:
| Designation | Meaning |
|---|---|
| ER | Electrode/Rod (bare filler wire used in GTAW, GMAW, and similar welding processes) |
| Ti | Titanium base metal composition |
| 5 | Grade 5 titanium alloy (Ti-6Al-4V) |
Unlike CP titanium filler metals (ERTi-1 to ERTi-4), which mainly vary by oxygen content, ERTi-5 is a true alloyed filler metal. Aluminium and vanadium additions create a dual-phase alpha-beta structure, significantly increasing strength while introducing phase-transformation considerations during welding and cooling.
Chemical Composition of ERTi-5 Wire per AWS A5.16
The chemical composition of ERTi-5 filler wire and its proportion in percentage is given below in the table:
| Specification | Aluminium (Al) | Vanadium (V) | Nitrogen (N) | Carbon (C) | Hydrogen (H) | Iron (Fe) | Oxygen (O) | Titanium (Ti) |
|---|---|---|---|---|---|---|---|---|
| AWS A5.16 Req. (%) | 5.50–6.75 | 3.50–4.50 | 0.05 max | 0.05 max | 0.015 max | 0.40 max | 0.20 max | Remainder |
Mechanical Properties of ERTi-5 Weld Deposits
The mechanical properties of ERTi-5 weld deposits, along with tensile strength, yield strength and elongation, are listed below:
| Specification | Tensile Strength | Yield Strength (0.2%) | Elongation | Hardness |
|---|---|---|---|---|
| AWS A5.16 Minimum | 895 MPa (130 ksi) | 828 MPa (120 ksi) | 10% | Not specified |
| Typical (Annealed) | 930–1000 MPa | 860–910 MPa | 10–15% | ~34 HRC |
ERTi-5 weld deposits are roughly 2.6 times stronger than ERTi-2 (345 MPa) but with lower ductility (10% vs 20%). After STA, tensile strength can exceed 1035 MPa (150 ksi). Cooling rate directly affects microstructure: fast cooling produces fine acicular alpha (stronger), slow cooling produces coarser colony alpha (weaker).
Base Metal Compatibility and ASME Section IX Data for ERTi-5
The base metal and its compatibility, along with UNS number & P-number, are listed in the table below:
| Base Metal | UNS | P-Number | Joint Type |
|---|---|---|---|
| Ti-6Al-4V (Grade 5) | R56400 | P-53 | Matching (primary) |
| Ti-6Al-4V ELI (Grade 23) | R56407 | P-53 | Matching (use ERTi-23 for full ELI benefit) |
Do not use ERTi-5 for CP titanium Grades 1 through 4. The overmatch creates a hard weld zone against softer base metal, risking cracking.
Recommended Welding Parameters for ERTi-5 Filler Rod
GTAW (TIG) parameters for ERTi-5 on DCEN polarity are given below. All passes require 100% UHP argon shielding, back purge, and trailing shield until the weld cools below 427°C.
| Wire Dia. | Amperage (A) | Voltage (V) | Gas |
|---|---|---|---|
| 1.0 mm | 25–60 | 8–12 | 100% Argon UHP |
| 1.6 mm | 50–100 | 10–14 | 100% Argon UHP |
| 2.4 mm | 90–160 | 12–16 | 100% Argon UHP |
| 3.2 mm | 130–200 | 14–18 | 100% Argon UHP |
Interpass temperature must stay below 175°C (350°F). Do not preheat, as preheating slows cooling and coarsens the microstructure. Stress relief at 595–650°C for 1 to 4 hours in a vacuum or inert-gas furnace is standard for aerospace work.
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Industrial Welding Applications of ERTi-5 (Ti-6Al-4V) Filler Wire
ERTi-5 Filler wire is used to withstand touch operating conditions in the following high-performing industries:
- Aerospace: Used for critical structures like wing spars, bulkheads, fuselage frames, landing gear beams, and jet engine compressor blades.
- Medical: Applied in orthopaedic implants, such as hip stems, knee components, and spinal fusion devices.
- Defence: Selected for high-strength, lightweight welded components in defence systems.
- Marine: Suitable for subsea hardware and marine structures that demand corrosion resistance.
- Motorsport: Used in performance-critical parts.
- Chemical processing: Chosen for high-pressure reactor vessels and related equipment.
Storage and Handling of ERTi-5 TIG Welding Rod
Store ERTi-5 wire in sealed packaging within a dry, climate-controlled area, away from ferrous materials. Clean the wire and base metal with acetone before welding. Handle with lint-free gloves and use only stainless steel brushes dedicated to titanium. Keep AMS 4954/4956 documentation accessible for traceability.
Available Forms and Packaging of ERTi-5
Nicorex Alloys stocks ERTi-5 welding wire in forms, diameters, and packaging mentioned in the table below:
| Form | Diameter | Packaging |
|---|---|---|
| TIG Rod | 1.0, 1.6, 2.0, 2.4, 3.2 mm | 5 kg sealed tubes, 914/1000 mm lengths |
| MIG Spool | 0.9, 1.2 mm | 5/10 kg vacuum-sealed spools |
Every lot ships with EN 10204/3.1B mill test certificates covering full interstitial analysis plus Al/V content.
How to Order ERTi-5 MIG & TIG Filler Metal from Nicorex Alloys
To order ERTi-5 (Titanium Grade 5) TIG Filler Rod & MIG Wire, provide these 10 important details:
- AWS Classification: ERTi-5 per AWS A5.16 / ASME SFA-5.16; AMS 4954
- Diameter: GTAW: 1.6 mm / 2.4 mm / 3.2 mm; GMAW: 0.9 mm / 1.2 mm
- Quantity: GTAW: specify kg or tube packs; GMAW: specify spool count
- Testing / Certification: MTC EN 10204 3.1/3.2; PMI Report; ASTM F136 / B863; TPI
- Base Metal: Ti Grade 5 UNS R56400 / R56402
- Material Grade: Ti-6Al-4V Grade 5; UNS R56400; AMS 4928; EN ISO 24034: S Ti 6404
- Third-Party Approvals: NADCAP / AMS4954 (aerospace); DNV / ABS / LR (marine); TÜV (chemical)
- Applicable Code: ASME IX; AWS D1.9; AMS standards
- Delivery: Domestic
- Remarks: 99.999% pure Ar shielding + trailing/back purge mandatory
Frequently Asked Questions
Can ERTi-2 be used to weld Grade 5 (Ti-6Al-4V) Titanium?
It is technically possible, but strongly not recommended. ERTi-2 deposits only ~345 MPa tensile versus 895 MPa for Ti-6Al-4V base metal. That undermatch turns the weld zone into the weakest link. Use ERTi-5 (matching) for all Grade 5 welding.
What PWHT is Required for ERTi-5 Welds?
PWHT is not mandatory under AWS A5.16, but stress relief at 595–650°C (1100–1200°F) for 1–4 hours is standard for aerospace and medical applications. This relieves residual stresses that reduce fatigue life. The furnace must run under a vacuum or an inert-gas atmosphere to prevent contamination.
What is the difference between ERTi-5 and ERTi-23 (ELI)?
ERTi-5 is a standard Ti-6Al-4V filler for high-strength structural welding. ERTi-23 (ELI) is Ti-6Al-4V with lower interstitials, offering superior toughness for critical aerospace and medical implant applications.
When should ERTi-5 not be used?
Avoid ERTi-5 on CP titanium (Grades 1 through 4) because the strength overmatch risks fusion-line cracking. Do not use it above 427°C (800°F) continuous, as Ti-6Al-4V loses significant strength. For cryogenic service below –196°C, ERTi-23 (ELI) may be required.