Titanium Ti Grade 32-SR (Stress relieved)
Heat-treated state
UNS R55111 · ASTM Grade 32
Applied to weldments and cold-formed parts to relieve residual stress without changing microstructure appreciably.
Values for the SR condition
Other Ti Grade 32 tempers and conditions
Ti Grade 32 is listed in 3 conditions; see the grade overview at Ti Grade 32.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ANNDefault Annealed | Standard stocked condition for plate, bar and tube — balanced strength, ductility and weldability. | 700 | 790 | 15 | 29 HRC | — |
SRThis page Stress relieved | Applied to weldments and cold-formed parts to relieve residual stress without changing microstructure appreciably. | 710 | 800 | 14 | 30 HRC | 1 % IACS |
Solution treated and aged | Used when a modest strength uplift is needed in bar/forgings; costs ductility and some toughness. | 820 | 900 | 10 | 34 HRC | — |
What is Ti Grade 32-SR?
Ti Grade 32-SR is Ti Grade 32 heat treated to SR — applied to weldments and cold-formed parts to relieve residual stress without changing microstructure appreciably. Ti Grade 32-SR has a yield strength of 710 MPa (103 ksi) and a tensile strength of 800 MPa (116 ksi) — stronger than 53% of titanium grades. Elongation at break is 14% and the elastic modulus is 110 GPa (16 Msi). Ti Grade 32-SR has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,600°C (2,912 °F). ANN is the default condition FabDigit quotes; SR is available on request or by drawing note.
Advantages
- Tough — resists crack growth — 88 MPa·√m (80.1 ksi·√in), better than 95% of titanium grades
- High service temperature — 400°C (752 °F), better than 78% of titanium grades
Limitations
- Low electrical conductivity — 1 % IACS, worse than 89% of titanium grades
Ti Grade 32-SR properties
Typical room-temperature values for Ti Grade 32-SR; 22 are specific to this condition. Other listed values are Ti Grade 32 reference data and may not represent this condition. Bars are the position among titanium grades.
Physical3
Ti Grade 32-SR has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,600°C (2,912 °F).
Mechanical16
Ti Grade 32-SR has a yield strength of 710 MPa (103 ksi) and a tensile strength of 800 MPa (116 ksi) — stronger than 53% of titanium grades. Elongation at break is 14% and the elastic modulus is 110 GPa (16 Msi).
Thermal6
Ti Grade 32-SR is rated for continuous service to 400°C (752 °F). It conducts heat at 7.5 W/m·K (4.33 BTU/hr·ft·°F), worse than 65% of titanium grades. Thermal expansion is 9.4 µm/m·K (5.22 µin/in·°F).
Electrical3
Ti Grade 32-SR conducts electricity at 1 % IACS, worse than 89% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (92/100), better than 53% of titanium grades.
Sustainability4
Producing a kilogram of Ti Grade 32-SR takes about 620 MJ of energy and emits 40 kg of CO₂ — less than 97% of titanium grades. Typical recycled content is 25%.
Manufacturability8
Ti Grade 32-SR's machinability is poor (21/100, worse than 58% of titanium grades); weldability excellent (85/100); formability fair (52/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Ti Grade 32-SR
Is Ti Grade 32 easy to machine?
Machine like Ti-6Al-4V: rigid setup, sharp uncoated-carbide or coated tools, 30–60 m/min, heavy flood coolant, positive rake and constant feed to avoid work-hardened glazing and fire risk from fine chips.
Can Ti Grade 32 be welded?
Excellent GTAW/GMAW/EBW response with matching or Grade 32/Ti-5111 filler; requires full inert shielding of weld, backside and trailing HAZ below ~400 °C and scrupulously clean, oxide-free joints.
Can Ti Grade 32 be formed, bent or molded?
Cold forms with generous bend radii (≈4–5 t) and springback allowance; hot forming or SPF-type work at 700–900 °C is preferred for tight radii and thick plate.
What surface finishes work on Ti Grade 32?
Pickle in HNO₃/HF to remove alpha case after hot work; accepts colour/Type II anodizing, glass-bead or abrasive blasting and mechanical polishing — avoid steel contamination during grinding.
Ti Grade 32 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 |
|---|---|---|
| Al | 4.5 – 5.5 | 5 |
| Sn | 0.6 – 1.4 | 1 |
| Zr | 0.6 – 1.4 | 1 |
| V | 0.6 – 1.4 | 1 |
| Mo | 0.6 – 1.2 | 0.8 |
| Sicreep/strength stabilizer | 0.06 – 0.14 | 0.1 |
| Fe | ≤ 0.25 | — |
| O | ≤ 0.11 | — |
| C | ≤ 0.08 | — |
| N | ≤ 0.03 | — |
| Hmax, product-form dependent | ≤ 0.02 | — |
| Residuals each0.4 max total | ≤ 0.1 | — |
| Ti | balance | — |
Ti Grade 32-SR — frequently asked
What is Ti Grade 32-SR used for?
Ti Grade 32-SR is typically used for offshore riser components, pressure vessels and subsea equipment. In short: near-alpha, weldable and tough; 400 °C service capability; riser-grade titanium plate.
What is the yield strength of Ti Grade 32-SR?
Ti Grade 32-SR has a typical yield strength of 710 MPa (103 ksi) and a tensile strength of 800 MPa (116 ksi) — stronger than 53% of titanium grades. Strength varies by condition: see the 3 listed tempers.
Is Ti Grade 32-SR easy to machine?
Not especially — machinability is rated poor (21/100, worse than 58% of titanium grades). Machine like Ti-6Al-4V: rigid setup, sharp uncoated-carbide or coated tools, 30–60 m/min, heavy flood coolant, positive rake and constant feed to avoid work-hardened glazing and fire risk from fine chips.
Can Ti Grade 32-SR be welded?
Yes — weldability is rated excellent (85/100). Excellent GTAW/GMAW/EBW response with matching or Grade 32/Ti-5111 filler; requires full inert shielding of weld, backside and trailing HAZ below ~400 °C and scrupulously clean, oxide-free joints.
What surface finishes work on Ti Grade 32-SR?
Pickle in HNO₃/HF to remove alpha case after hot work; accepts colour/Type II anodizing, glass-bead or abrasive blasting and mechanical polishing — avoid steel contamination during grinding.
Can Ti Grade 32-SR be formed, bent or molded?
Cold forms with generous bend radii (≈4–5 t) and springback allowance; hot forming or SPF-type work at 700–900 °C is preferred for tight radii and thick plate.
What is the maximum service temperature of Ti Grade 32-SR?
Ti Grade 32-SR is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Ti Grade 32-ANN and Ti Grade 32-STA?
ANN is the default condition — standard stocked condition for plate, bar and tube — balanced strength, ductility and weldability. STA: used when a modest strength uplift is needed in bar/forgings; costs ductility and some toughness. Yield strength is 700 MPa in ANN versus 820 MPa in STA.
Sources
- ASTM B265 — Titanium and Titanium Alloy Strip, Sheet, and Plate — ASTM International (2020)
- ASTM B348 — Titanium and Titanium Alloy Bars and Billets — ASTM International (2021)
- ASTM B381 — Titanium and Titanium Alloy Forgings — ASTM International (2019)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Materials Properties Handbook: Titanium Alloys — ASM International (1994)
- Naval Surface Warfare Center reports on Ti-5Al-1Sn-1Zr-1V-0.8Mo (Ti-5111) — US Navy / NSWCCD (1998)
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.