Titanium Grade 2 · heat-treated state
Titanium Grade 2-SR
Properties of the SR condition, compared with the other Grade 2 tempers.
Pick for dimensionally stable tube, bar and machined parts that need higher yield than annealed while keeping useful ductility.
What is Grade 2-SR?
Grade 2-SR is Grade 2 heat treated to SR — pick for dimensionally stable tube, bar and machined parts that need higher yield than annealed while keeping useful ductility. Grade 2-SR has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 65% of titanium grades. Elongation at break is 20% and the elastic modulus is 103 GPa (14.9 Msi). Grade 2-SR 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). O is the default condition FabDigit quotes; SR is available on request or by drawing note.
Advantages
- Easy to machine — 45/100, better than 100% of titanium grades
- Readily welded — 90/100, better than 93% of titanium grades
- High electrical conductivity — 3.1 % IACS, better than 75% of titanium grades
Grade 2-SR properties
Typical room-temperature values for Grade 2-SR — 9 properties are specific to this condition; the rest are grade-level values shared by every Grade 2 temper. Each bar shows where the value sits among the titanium grades in FabDigit's library — further right is higher.
Physical3
Grade 2-SR 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-SR has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 65% of titanium grades. Elongation at break is 20% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal6
Grade 2-SR 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-SR 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-SR 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-SR's machinability is fair (45/100, better than 100% of titanium grades); weldability excellent (90/100); formability good (60/100).
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other Grade 2 tempers and conditions
Grade 2 is also supplied in 4 other conditions. The full side-by-side table is on the Grade 2 overview.
- ODefaultDefault stocked condition: best ductility and formability for chemical-plant, heat-exchanger and medical parts.380 MPa yield · 150 HB
- CWHighest strength CP-Ti condition for fasteners, springs, wire and small-diameter drawn tube; ductility and formability are reduced.550 MPa yield · 210 HB
- SRPick for dimensionally stable tube, bar and machined parts that need higher yield than annealed while keeping useful ductility.450 MPa yield · 180 HB
Working with Grade 2-SR
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.
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.
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 | — |
Grade 2-SR — frequently asked
What is Grade 2-SR used for?
Grade 2-SR 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-SR?
Grade 2-SR has a typical yield strength of 450 MPa (65.3 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 65% of titanium grades. Strength varies by condition: see the 5 listed tempers.
Is Grade 2-SR easy to machine?
Reasonably — machinability is rated fair (45/100, better than 100% 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-SR 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-SR?
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-SR 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-SR?
Grade 2-SR 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.
Can FabDigit make parts in Grade 2-SR?
Yes — Grade 2-SR 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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.