Titanium ERTi-3
ASTM B863 ERTi-3
ERTi-3 is a higher-oxygen commercially pure titanium filler wire covered by ASTM B863, matching Grade 3 base metal and used when weld deposits stronger than ERTi-2 are required.
Reference datasheet — ERTi-3 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the AW condition
ERTi-3 tempers and conditions
ERTi-3 is supplied in 2 conditions, soft to hard. AW is the default FabDigit quotes; the values on this page are for it.
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Stress relieved | Choose when residual stress or stress-corrosion/hydrogen concerns require post-weld stress relief of the CP-Ti joint. | 425 | 510 | 23 | 198 HB | 3.1 % IACS |
AWDefault As-welded deposit | Default condition: undiluted weld metal deposited with inert-gas shielding, no post-weld heat treatment. | 440 | 520 | 20 | 205 HB | — |
Supply forms, finishes and certifications
Ways ERTi-3 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
ANN-WIRE | Annealed wire | Supply form |
What is ERTi-3?
ERTi-3 is a higher-oxygen commercially pure titanium filler wire covered by ASTM B863, matching Grade 3 base metal and used when weld deposits stronger than ERTi-2 are required. It is supplied as cold-drawn, vacuum-annealed wire in as-welded, annealed-wire and stress-relieved conditions, with typical deposit values of 440 MPa yield, 520 MPa tensile, 20% elongation, 205 HB and a corrosion resistance score of 93. Service is limited to about 300 °C and ductility is lower than ERTi-2, which remains the choice for tight-radius formed weldments. ERTi-3 has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,660°C (3,020 °F). ERTi-3 has a yield strength of 440 MPa (63.8 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 66% of titanium grades. Elongation at break is 20% and the elastic modulus is 105 GPa (15.2 Msi).
What is ERTi-3 used for?
- Welding Grade 3 CP titanium sheet and pipe
- Chemical processing equipment
- Marine hardware requiring higher strength CP-Ti welds
Advantages
- Readily welded — 92/100, better than 97% of titanium grades
- High electrical conductivity — 3.1 % IACS, better than 75% of titanium grades
ERTi-3 properties
Typical room-temperature values for ERTi-3-AW; bars are the position among titanium grades.
Physical3
ERTi-3 has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,660°C (3,020 °F).
Mechanical16
ERTi-3 has a yield strength of 440 MPa (63.8 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 66% of titanium grades. Elongation at break is 20% and the elastic modulus is 105 GPa (15.2 Msi).
Thermal6
ERTi-3 is rated for continuous service to 300°C (572 °F). It conducts heat at 16 W/m·K (9.24 BTU/hr·ft·°F), better than 61% of titanium grades. Thermal expansion is 8.6 µm/m·K (4.78 µin/in·°F).
Electrical3
ERTi-3 conducts electricity at 3.1 % IACS, better than 75% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (93/100), better than 72% of titanium grades.
Sustainability4
Producing a kilogram of ERTi-3 takes about 660 MJ of energy and emits 40 kg of CO₂ — less than 57% of titanium grades. Typical recycled content is 20%.
Manufacturability7
ERTi-3's machinability is poor (28/100, better than 59% of titanium grades); weldability excellent (92/100); formability good (55/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the titanium family
Yield strength against density for every titanium grade FabDigit runs. ERTi-3 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with ERTi-3
Is ERTi-3 easy to machine?
Filler wire is rarely machined; if machined, use sharp carbide tools, low speed / high feed, flood coolant and avoid dwell to prevent galling and fire risk from fine chips.
Can ERTi-3 be welded?
GTAW/GMAW/PAW with high-purity argon torch, trailing and back purge; keep weld and HAZ below ~430 °C in air, clean wire with acetone and use only stainless/clean tooling to avoid Fe pickup — straw/blue tint indicates unacceptable contamination.
Can ERTi-3 be formed, bent or molded?
Wire is cold drawn and vacuum annealed; joint prep should allow spring-back allowance since CP Ti Gr.3 cold-forms with roughly 2–3× the springback of carbon steel.
ERTi-3 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Oprincipal strengthener vs ERTi-2 | 0.13 – 0.2 | 0.16 |
| Fe | ≤ 0.2 | 0.1 |
| C | ≤ 0.03 | 0.02 |
| N | ≤ 0.02 | 0.01 |
| Hhydrogen must stay low to avoid weld embrittlement | ≤ 0.01 | 0 |
| Others (each) | ≤ 0.05 | |
| Others (total) | ≤ 0.3 | |
| Ti | balance |
What surface finishes work on ERTi-3?
Pickle in HNO3/HF or grit blast with clean alumina then passivate; colour anodising and glass-bead finishing are common — never use iron-contaminated abrasives.
Surface treatments FabDigit runs on titanium parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Titanium ERTi-3 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- B863 ERTi-3
How much does ERTi-3 cost?
ERTi-3 is a high-cost titanium ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
ERTi-3 — frequently asked
What is ERTi-3 used for?
ERTi-3 is typically used for welding Grade 3 CP titanium sheet and pipe, chemical processing equipment and marine hardware requiring higher strength CP-Ti welds. In short: stronger than ERTi-2; higher-oxygen CP filler; grade 3 matching deposit.
What is the yield strength of ERTi-3?
ERTi-3 has a typical yield strength of 440 MPa (63.8 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 66% of titanium grades. Strength varies by condition: see the 2 listed tempers.
Is ERTi-3 easy to machine?
Not especially — machinability is rated poor (28/100, better than 59% of titanium grades). Filler wire is rarely machined; if machined, use sharp carbide tools, low speed / high feed, flood coolant and avoid dwell to prevent galling and fire risk from fine chips.
Can ERTi-3 be welded?
Yes — weldability is rated excellent (92/100). GTAW/GMAW/PAW with high-purity argon torch, trailing and back purge; keep weld and HAZ below ~430 °C in air, clean wire with acetone and use only stainless/clean tooling to avoid Fe pickup — straw/blue tint indicates unacceptable contamination.
What surface finishes work on ERTi-3?
Pickle in HNO3/HF or grit blast with clean alumina then passivate; colour anodising and glass-bead finishing are common — never use iron-contaminated abrasives.
Can ERTi-3 be formed, bent or molded?
Wire is cold drawn and vacuum annealed; joint prep should allow spring-back allowance since CP Ti Gr.3 cold-forms with roughly 2–3× the springback of carbon steel.
What is the maximum service temperature of ERTi-3?
ERTi-3 is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between ERTi-3-AW and ERTi-3-SR?
AW is the default condition — default condition: undiluted weld metal deposited with inert-gas shielding, no post-weld heat treatment. SR: choose when residual stress or stress-corrosion/hydrogen concerns require post-weld stress relief of the CP-Ti joint. Yield strength is 440 MPa in AW versus 425 MPa in SR.
How much does ERTi-3 cost?
ERTi-3 is a high-cost titanium ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- AWS A5.16/A5.16M — Titanium and Titanium-Alloy Welding Electrodes and Rods — AWS (2013)
- ASTM B863 — Titanium and Titanium Alloy Wire — ASTM (2021)
- ASTM B265 — Titanium and Titanium Alloy Strip, Sheet and Plate (Grade 3) — ASTM (2020)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.