Titanium Ti Grade 33
UNS R53442 · ASTM Grade 33
Ti Grade 33 (UNS R53442) is a multi-alloyed, lower-cost corrosion-resistant titanium developed to reduce reliance on palladium while matching Grade 7-like crevice-corrosion performance, and is listed with the commercially pure and lean-alloy grades.
Reference datasheet — Ti Grade 33 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 Annealed condition
Ti Grade 33 tempers and conditions
Ti Grade 33 is supplied in 3 conditions, soft to hard. Annealed is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault mill annealed sheet, plate, bar, tube (ASTM B265/B338/B348 Grade 33) | Standard stocked condition for corrosion service — maximum ductility and formability, weld-ready. | 320 | 420 | 25 | 160 HB | — |
As-welded deposit | Property basis for autogenously welded Grade 33 tube and fabricated vessel welds (ASTM B338 welded, B363 fittings). | 320 | 415 | 20 | 170 HB | 3.1 % IACS |
Cold worked and stress relieved | Choose for higher strength fasteners, drawn tubing and machined parts where forming is complete. | 480 | 560 | 16 | 200 HB | — |
What is Ti Grade 33?
Ti Grade 33 (UNS R53442) is a multi-alloyed, lower-cost corrosion-resistant titanium developed to reduce reliance on palladium while matching Grade 7-like crevice-corrosion performance, and is listed with the commercially pure and lean-alloy grades. Annealed stock gives 320 MPa yield, 420 MPa tensile, 25 % elongation and about 160 HB (82 HRB), with service to 315 °C and a corrosion-resistance rating of 94; it is offered annealed, cold-worked stress-relieved and as-welded. Weldability (88) and formability (75) are good, but machinability is low (38). Grade 7 is the direct alternative where Pd-bearing material is specified. Ti Grade 33 has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,655°C (3,011 °F). Ti Grade 33 has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 420 MPa (60.9 ksi) — weaker than 87% of titanium grades. Elongation at break is 25% and the elastic modulus is 105 GPa (15.2 Msi).
What is Ti Grade 33 used for?
- Chemical process piping
- Desalination equipment
- Seawater and brine heat exchangers
- Welded tube and pipe spools
- Scrubber and absorber internals
- Tank linings and vessel cladding
Advantages
- Easy to machine — 38/100, better than 85% of titanium grades
- Forms and bends easily — 75/100, better than 83% of titanium grades
- Ductile — tolerates forming and impact — 25%, better than 82% of titanium grades
- Tough — resists crack growth — 80 MPa·√m (72.8 ksi·√in), better than 81% of titanium grades
- Conducts heat well — 16.5 W/m·K (9.53 BTU/hr·ft·°F), better than 80% of titanium grades
Limitations
- Low strength — 320 MPa (46.4 ksi), worse than 87% of titanium grades
Ti Grade 33 properties
Typical room-temperature values for Ti Grade 33-Annealed; bars are the position among titanium grades.
Physical3
Ti Grade 33 has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,655°C (3,011 °F).
Mechanical16
Ti Grade 33 has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 420 MPa (60.9 ksi) — weaker than 87% of titanium grades. Elongation at break is 25% and the elastic modulus is 105 GPa (15.2 Msi).
Thermal6
Ti Grade 33 is rated for continuous service to 315°C (599 °F). It conducts heat at 16.5 W/m·K (9.53 BTU/hr·ft·°F), better than 80% of titanium grades. Thermal expansion is 8.8 µm/m·K (4.89 µin/in·°F).
Electrical3
Ti Grade 33 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 Ti Grade 33 takes about 650 MJ of energy and emits 40 kg of CO₂ — less than 75% of titanium grades. Typical recycled content is 20%.
Manufacturability8
Ti Grade 33's machinability is fair (38/100, better than 85% of titanium grades); weldability excellent (88/100); formability very good (75/100).
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. Ti Grade 33 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Ti Grade 33
Is Ti Grade 33 easy to machine?
Machine like CP Ti Gr.2: rigid setup, sharp uncoated-carbide or PVD tools, low surface speed (25–45 m/min) with heavy feed and flood coolant to avoid work hardening, galling and chip fires.
Can Ti Grade 33 be welded?
Very good GTAW/plasma/EB weldability autogenously or with matching/CP filler, but requires full inert (Ar/He) shielding of weld, HAZ and root plus a clean, oil- and moisture-free surface; keep interpass temperature low and check weld colour.
Can Ti Grade 33 be formed, bent or molded?
Cold form in the annealed condition with generous bend radii (2–3 t) and allowance for springback; hot form or stress-relieve at 480–595 °C for severe shapes, and never contact lead or chlorinated lubricants.
Ti Grade 33 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 |
|---|---|---|
| N | ≤ 0.03 | 0.01 |
| C | ≤ 0.08 | 0.02 |
| H | ≤ 0.02 | 0.01 |
| Fe | ≤ 0.3 | 0.1 |
| Omax; the higher-oxygen sister alloy is Grade 34 | ≤ 0.25 | 0.15 |
| Ni | 0.35 – 0.55 | 0.45 |
| Ru | 0.02 – 0.04 | 0.03 |
| Pdfar lower Pd than Grade 7 | 0.01 – 0.02 | 0.02 |
| Cr | 0.1 – 0.2 | 0.15 |
| Other, eachresiduals, each | ≤ 0.1 | |
| Other, totalresiduals, total | ≤ 0.4 | |
| Ti | balance |
What surface finishes work on Ti Grade 33?
Pickle in HNO₃/HF after hot work to remove alpha case; colour anodizing, glass-bead blasting and passivation all work; use plasma/hard-coat or lubricious coatings for wear surfaces since titanium galls against itself.
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 Ti Grade 33 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- R53442
- ASTM
- Grade 33
How much does Ti Grade 33 cost?
Ti Grade 33 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.
Ti Grade 33 — frequently asked
What is Ti Grade 33 used for?
Ti Grade 33 is typically used for chemical process piping, desalination equipment, seawater and brine heat exchangers, welded tube and pipe spools, scrubber and absorber internals and tank linings and vessel cladding. In short: palladium-free Grade 7 substitute; low-cost corrosion titanium; weldable and formable.
What is the yield strength of Ti Grade 33?
Ti Grade 33 has a typical yield strength of 320 MPa (46.4 ksi) and a tensile strength of 420 MPa (60.9 ksi) — weaker than 87% of titanium grades. Strength varies by condition: see the 3 listed tempers.
Is Ti Grade 33 easy to machine?
Not especially — machinability is rated fair (38/100, better than 85% of titanium grades). Machine like CP Ti Gr.2: rigid setup, sharp uncoated-carbide or PVD tools, low surface speed (25–45 m/min) with heavy feed and flood coolant to avoid work hardening, galling and chip fires.
Can Ti Grade 33 be welded?
Yes — weldability is rated excellent (88/100). Very good GTAW/plasma/EB weldability autogenously or with matching/CP filler, but requires full inert (Ar/He) shielding of weld, HAZ and root plus a clean, oil- and moisture-free surface; keep interpass temperature low and check weld colour.
What surface finishes work on Ti Grade 33?
Pickle in HNO₃/HF after hot work to remove alpha case; colour anodizing, glass-bead blasting and passivation all work; use plasma/hard-coat or lubricious coatings for wear surfaces since titanium galls against itself.
Can Ti Grade 33 be formed, bent or molded?
Cold form in the annealed condition with generous bend radii (2–3 t) and allowance for springback; hot form or stress-relieve at 480–595 °C for severe shapes, and never contact lead or chlorinated lubricants.
What is the maximum service temperature of Ti Grade 33?
Ti Grade 33 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 Ti Grade 33 Annealed and Ti Grade 33 CW-SR?
Annealed is the default condition — standard stocked condition for corrosion service — maximum ductility and formability, weld-ready. CW-SR: choose for higher strength fasteners, drawn tubing and machined parts where forming is complete. Yield strength is 320 MPa in Annealed versus 480 MPa in CW-SR.
How much does Ti Grade 33 cost?
Ti Grade 33 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
- ASTM B265 — Titanium and Titanium Alloy Strip, Sheet and Plate (Grade 33, UNS R53442) — ASTM International (2020)
- ASTM B348 / B381 / B338 / B363 — Ti bar, forgings, tube and fittings — ASTM International (2019)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials (titanium and titanium alloys) — ASM International (2005)
- Corrosion-resistant titanium alloy datasheets (Ti-Ni-Ru-Pd-Cr lean-palladium grades) — titanium mill literature (2021)
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.