Titanium Grade 2
ASTM Grade 2 · UNS R50400 · EN 3.7035 · GB TA2 · AMS 4901, 4902
Grade 2 is unalloyed commercially pure titanium (UNS R50400, 3.7035, TA2) supplied to the ASTM B265/B348 family, strengthened by controlled oxygen and iron rather than alloy additions.
Values for the O condition
Grade 2 tempers and conditions
Grade 2 is supplied in 5 conditions, soft to hard. O is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As-welded deposit | Property set for weld joints and ERTi-2 filler deposits: strength close to base metal, slightly reduced ductility from coarse weld structure. | 370 | 450 | 18 | 9 HRC | 3.1 % IACS |
ODefault Annealed | Default stocked condition: best ductility and formability for chemical-plant, heat-exchanger and medical parts. | 380 | 440 | 28 | 150 HB | — |
Grade 2H | Dual-certified Gr 2/2H material selected for ASME pressure vessels to gain higher allowable stresses without changing chemistry. | 390 | 470 | 25 | 160 HB | 3.1 % IACS |
Stress relieved | Pick for dimensionally stable tube, bar and machined parts that need higher yield than annealed while keeping useful ductility. | 450 | 520 | 20 | 10 HRC | 3 % IACS |
Cold worked | Highest strength CP-Ti condition for fasteners, springs, wire and small-diameter drawn tube; ductility and formability are reduced. | 550 | 620 | 14 | 17 HRC | 3 % IACS |
What is Grade 2?
Grade 2 is unalloyed commercially pure titanium (UNS R50400, 3.7035, TA2) supplied to the ASTM B265/B348 family, strengthened by controlled oxygen and iron rather than alloy additions. In the annealed condition it gives 380 MPa yield, 440 MPa tensile and 28% elongation at about 150 HB, and is stocked as sheet, plate, bar, tube and forgings for general industrial, chemical and marine service. It is the best-balanced CP grade for welding and forming (formability score 78) but machinability is low at 40 and useful strength ends near 300 °C. Move to Grade 3 or 4 for more strength, Grade 5 where strength-to-weight governs, or Grade 7 for hot reducing acids and crevice attack. Grade 2 has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,665°C (3,029 °F). Grade 2 has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 440 MPa (63.8 ksi) — weaker than 73% of titanium grades. Elongation at break is 28% and the elastic modulus is 103 GPa (14.9 Msi).
What is Grade 2 used for?
- Marine hardware and seawater fittings
- Heat exchanger tube and tubesheets
- Chemical process piping and vessel liners
- Aircraft fuselage skins and brackets
- Desalination plant components
- Anodes and electroplating racks
- Sheet metal enclosures for corrosive service
Advantages
- Easy to machine — 40/100, better than 93% of titanium grades
- Readily welded — 90/100, better than 93% of titanium grades
- Ductile — tolerates forming and impact — 28%, better than 89% of titanium grades
- Forms and bends easily — 78/100, better than 87% of titanium grades
- High electrical conductivity — 3.1 % IACS, better than 75% of titanium grades
Grade 2 properties
Typical room-temperature values for Grade 2-O; bars are the position among titanium grades.
Physical3
Grade 2 has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,665°C (3,029 °F).
Mechanical16
Grade 2 has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 440 MPa (63.8 ksi) — weaker than 73% of titanium grades. Elongation at break is 28% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal6
Grade 2 is rated for continuous service to 300°C (572 °F). It conducts heat at 16.4 W/m·K (9.48 BTU/hr·ft·°F), better than 71% of titanium grades. Thermal expansion is 8.6 µm/m·K (4.78 µin/in·°F).
Electrical3
Grade 2 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 Grade 2 takes about 650 MJ of energy and emits 38 kg of CO₂ — less than 75% of titanium grades. Typical recycled content is 25%.
Manufacturability8
Grade 2's machinability is fair (40/100, better than 93% of titanium grades); weldability excellent (90/100); formability very good (78/100).
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. Grade 2 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Grade 2
Is Grade 2 easy to machine?
Use rigid setups, sharp uncoated-carbide or polished-flute tools, low surface speed (30–60 m/min) with heavy chlorine-free flood coolant; never dwell or rub, and keep chips away from ignition sources.
Can Grade 2 be welded?
Readily GTAW/plasma/EB welded with ERTi-2 filler under high-purity argon with trailing shield and back purge — weld must stay silver; any blue/grey/white tint means oxygen pickup and embrittlement.
Can Grade 2 be formed, bent or molded?
Cold form with generous bend radii (≈2.5–3 t) and allow for high springback; warm forming at 200–400 °C greatly improves formability, and lubricants must be chloride-free.
Manufacturability
The process limits FabDigit's quote engine applies to Grade 2. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Fair40 / 100 |
|---|---|
| ISO material group | S.4 |
| Cutting speed (rough / finish) | 90 / 110 m/min |
| Minimum wall | 1 mm |
| Minimum internal radius | 1.5 mm |
| Drill depth limit | 4.5× diameter |
| Best surface (machined / polished) | Ra 1.6 / 0.8 µm |
| Hardenable after machining | No |
Sheet metal
| Formability | Better78 / 100 |
|---|---|
| Weldability | Better90 / 100 |
| Bendable | Yes |
| Minimum bend radius | 2× thickness |
| Sheet thickness range | 0.5 – 6 mm |
| Spring-back | High |
Grade 2 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 |
| H0.0125 max for plate in some product forms | ≤ 0.02 | 0.01 |
| Fe | ≤ 0.3 | 0.1 |
| Omain strengthening interstitial | ≤ 0.25 | 0.15 |
| Residuals (each)total residuals 0.40 max | ≤ 0.1 | |
| Ti≈99.2 % nominal | balance |
What surface finishes work on Grade 2?
Pickle/descale in HNO3-HF after hot work, then bead-blast, electropolish or colour anodize (AMS 2488) for wear and medical colour coding; avoid galling by anodizing or coating mating threads.
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).
Passivation
Conversion Coating
Organic Coating
CVD Coating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Titanium Grade 2 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- R50400
- ASTM
- B265 Gr 2
- AMS
- 49014902
- EN / DIN / Werkstoff-Nr.
- 3.7035
- GB (China)
- TA2
- Trade names
- CP Ti
How much does Grade 2 cost?
Grade 2 is a specialty-cost titanium ($$$$$), pricier than about 99% 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.
Grade 2 — frequently asked
What is Grade 2 used for?
Grade 2 is typically used for marine hardware and seawater fittings, heat exchanger tube and tubesheets, chemical process piping and vessel liners, aircraft fuselage skins and brackets, desalination plant components and anodes and electroplating racks. In short: workhorse CP titanium.
What is the yield strength of Grade 2?
Grade 2 has a typical yield strength of 380 MPa (55.1 ksi) and a tensile strength of 440 MPa (63.8 ksi) — weaker than 73% of titanium grades. Strength varies by condition: see the 5 listed tempers.
Is Grade 2 easy to machine?
Not especially — machinability is rated fair (40/100, better than 93% of titanium grades). Use rigid setups, sharp uncoated-carbide or polished-flute tools, low surface speed (30–60 m/min) with heavy chlorine-free flood coolant; never dwell or rub, and keep chips away from ignition sources.
Can Grade 2 be welded?
Yes — weldability is rated excellent (90/100). Readily GTAW/plasma/EB welded with ERTi-2 filler under high-purity argon with trailing shield and back purge — weld must stay silver; any blue/grey/white tint means oxygen pickup and embrittlement.
What surface finishes work on Grade 2?
Pickle/descale in HNO3-HF after hot work, then bead-blast, electropolish or colour anodize (AMS 2488) for wear and medical colour coding; avoid galling by anodizing or coating mating threads.
Can Grade 2 be formed, bent or molded?
Cold form with generous bend radii (≈2.5–3 t) and allow for high springback; warm forming at 200–400 °C greatly improves formability, and lubricants must be chloride-free.
What is the maximum service temperature of Grade 2?
Grade 2 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 Grade 2-O and Grade 2-CW?
O is the default condition — default stocked condition: best ductility and formability for chemical-plant, heat-exchanger and medical parts. CW: highest strength CP-Ti condition for fasteners, springs, wire and small-diameter drawn tube; ductility and formability are reduced. Yield strength is 380 MPa in O versus 550 MPa in CW.
How much does Grade 2 cost?
Grade 2 is a specialty-cost titanium ($$$$$), pricier than about 99% 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.
Can FabDigit make parts in Grade 2?
Yes — Grade 2 is available for CNC machining and sheet metal with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- ASTM B265 — Titanium and Titanium Alloy Strip, Sheet, and Plate — ASTM (2020)
- ASTM B348 / B338 / B381 — Ti bar, tube and forgings — ASTM (2021)
- AMS 4902 / AMS 4941 — CP titanium sheet and tubing — SAE International (2018)
- GB/T 3621 (TA2) — SAC (2022)
- ASM Handbook Vol. 2 — Properties of Nonferrous Alloys (Titanium) — ASM International (1990)
- Materials Properties Handbook: Titanium Alloys — ASM International (1994)
- Commercially Pure Titanium Grade 2 datasheet — TIMET / ATI (2020)
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.