Titanium ERTi-3-SR (Stress relieved)
Heat-treated state
ASTM B863 ERTi-3
Choose when residual stress or stress-corrosion/hydrogen concerns require post-weld stress relief of the CP-Ti joint.
Values for the SR condition
Other ERTi-3 tempers and conditions
ERTi-3 is listed in 2 conditions; see the grade overview at ERTi-3.
- SR
- AW
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
SRThis page 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 | — |
What is ERTi-3-SR?
ERTi-3-SR is ERTi-3 heat treated to SR — choose when residual stress or stress-corrosion/hydrogen concerns require post-weld stress relief of the CP-Ti joint. ERTi-3-SR has a yield strength of 425 MPa (61.6 ksi) and a tensile strength of 510 MPa (74 ksi) — weaker than 66% of titanium grades. Elongation at break is 23% and the elastic modulus is 105 GPa (15.2 Msi). ERTi-3-SR 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). AW is the default condition FabDigit quotes; SR is available on request or by drawing note.
Advantages
- Readily welded — 92/100, better than 97% of titanium grades
- Ductile — tolerates forming and impact — 23%, better than 76% of titanium grades
- High electrical conductivity — 3.1 % IACS, better than 75% of titanium grades
ERTi-3-SR properties
Typical room-temperature values for ERTi-3-SR; 22 are specific to this condition. Other listed values are ERTi-3 reference data and may not represent this condition. Bars are the position among titanium grades.
Physical3
ERTi-3-SR 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-SR has a yield strength of 425 MPa (61.6 ksi) and a tensile strength of 510 MPa (74 ksi) — weaker than 66% of titanium grades. Elongation at break is 23% and the elastic modulus is 105 GPa (15.2 Msi).
Thermal6
ERTi-3-SR is rated for continuous service to 315°C (599 °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-SR conducts electricity at 3.1 % IACS, better than 75% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (94/100), better than 80% of titanium grades.
Sustainability4
Producing a kilogram of ERTi-3-SR 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-SR's machinability is poor (29/100, better than 62% of titanium grades); weldability excellent (92/100); formability good (60/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with ERTi-3-SR
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.
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.
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 | — |
ERTi-3-SR — frequently asked
What is ERTi-3-SR used for?
ERTi-3-SR 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-SR?
ERTi-3-SR has a typical yield strength of 425 MPa (61.6 ksi) and a tensile strength of 510 MPa (74 ksi) — weaker than 66% of titanium grades. Strength varies by condition: see the 2 listed tempers.
Is ERTi-3-SR easy to machine?
Not especially — machinability is rated poor (29/100, better than 62% 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-SR 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-SR?
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-SR 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-SR?
ERTi-3-SR is rated for continuous use to about 315°C (599 °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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.