Titanium Grade 13 CWSR
Heat-treated state
ASTM Grade 13 · UNS R53413
CWSR = cold worked and stress relieved
Pick for cold-drawn tubing or wire where higher strength and tighter dimensional control are needed without losing corrosion performance.
Values for the CWSR condition
Other Grade 13 tempers and conditions
Grade 13 is listed in 3 conditions; see the grade overview at Grade 13.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault mill annealed sheet, plate, strip, bar and tube | Standard supply condition for all corrosion-service product forms; maximum ductility and formability. | 240 | 345 | 28 | 130 HB | — |
As-welded deposit | Reference condition for weld-joint design; Ru/Ni distribution is retained so weld corrosion resistance matches base metal when properly shielded. | 250 | 350 | 18 | 150 HB | 3.1 % IACS |
CWSRThis page Cold worked and stress relieved | Pick for cold-drawn tubing or wire where higher strength and tighter dimensional control are needed without losing corrosion performance. | 390 | 480 | 18 | 9 HRC | 3 % IACS |
What is Grade 13 CWSR?
Grade 13 CWSR is Grade 13 heat treated to CWSR — pick for cold-drawn tubing or wire where higher strength and tighter dimensional control are needed without losing corrosion performance. Grade 13 CWSR has a yield strength of 390 MPa (56.6 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 68% of titanium grades. Elongation at break is 18% and the elastic modulus is 105 GPa (15.2 Msi). Grade 13 CWSR has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,650°C (3,002 °F). Annealed is the default condition FabDigit quotes; CWSR is available on request or by drawing note.
Advantages
- Easy to machine — 42/100, better than 98% of titanium grades
- Conducts heat well — 17.5 W/m·K (10.1 BTU/hr·ft·°F), better than 90% of titanium grades
Limitations
- Limited service temperature — 250°C (482 °F), worse than 99% of titanium grades
Grade 13 CWSR properties
Typical room-temperature values for Grade 13 CWSR; 23 are specific to this condition. Other listed values are Grade 13 reference data and may not represent this condition. Bars are the position among titanium grades.
Physical3
Grade 13 CWSR has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,650°C (3,002 °F).
Mechanical16
Grade 13 CWSR has a yield strength of 390 MPa (56.6 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 68% of titanium grades. Elongation at break is 18% and the elastic modulus is 105 GPa (15.2 Msi).
Thermal6
Grade 13 CWSR is rated for continuous service to 250°C (482 °F). It conducts heat at 17.5 W/m·K (10.1 BTU/hr·ft·°F), better than 90% of titanium grades. Thermal expansion is 8.6 µm/m·K (4.78 µin/in·°F).
Electrical3
Grade 13 CWSR conducts electricity at 3 % IACS, better than 60% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (92/100), better than 53% of titanium grades.
Sustainability4
Producing a kilogram of Grade 13 CWSR takes about 660 MJ of energy and emits 45 kg of CO₂ — less than 57% of titanium grades. Typical recycled content is 25%.
Manufacturability7
Grade 13 CWSR's machinability is fair (42/100, better than 98% of titanium grades); weldability very good (80/100); formability fair (45/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Grade 13 CWSR
Is Grade 13 easy to machine?
Machine like CP titanium: low surface speed (20–35 m/min HSS, 45–75 m/min carbide), heavy positive rake, rigid setup, flood coolant, never dwell — galling and work-hardening are the main issues.
Can Grade 13 be welded?
Readily GTAW/PAW/EBW welded with matching or CP filler; requires full inert-gas shielding with trailing shield and backing purge, keep interpass low and joint spotless to avoid embrittlement.
Can Grade 13 be formed, bent or molded?
Good cold formability at low strain rates (bend radius ≈ 2–3 t); hot form 600–750 °C, allow generous springback and avoid chlorinated or lead-bearing lubricants.
What surface finishes work on Grade 13?
Pickle in HNO₃/HF then passivate; anodize (AMS 2488 type) for colour or anti-galling; no plating needed for corrosion service — descale carefully to avoid hydrogen pickup.
Grade 13 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 |
|---|---|---|
| Niα-stabilizer-free addition improving reducing-acid resistance | 0.4 – 0.6 | 0.5 |
| Rucathodic modifier, low-cost substitute for Pd | 0.02 – 0.04 | 0.03 |
| Fe | ≤ 0.2 | — |
| Olow-oxygen level gives Gr.13 its low strength/high ductility | ≤ 0.1 | — |
| C | ≤ 0.08 | — |
| N | ≤ 0.03 | — |
| H0.0125 % max for some tube/bar forms | ≤ 0.02 | — |
| Residuals, eachtotal 0.4 % max | ≤ 0.1 | — |
| Ti | balance | — |
Grade 13 CWSR — frequently asked
What is Grade 13 CWSR used for?
Grade 13 CWSR is typically used for chemical process piping, marine components and desalination equipment. In short: lower-cost Grade 7 substitute; crevice-resistant CP derivative; highly weldable corrosion grade.
What is the yield strength of Grade 13 CWSR?
Grade 13 CWSR has a typical yield strength of 390 MPa (56.6 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 68% of titanium grades. Strength varies by condition: see the 3 listed tempers.
Is Grade 13 CWSR easy to machine?
Not especially — machinability is rated fair (42/100, better than 98% of titanium grades). Machine like CP titanium: low surface speed (20–35 m/min HSS, 45–75 m/min carbide), heavy positive rake, rigid setup, flood coolant, never dwell — galling and work-hardening are the main issues.
Can Grade 13 CWSR be welded?
Yes — weldability is rated very good (80/100). Readily GTAW/PAW/EBW welded with matching or CP filler; requires full inert-gas shielding with trailing shield and backing purge, keep interpass low and joint spotless to avoid embrittlement.
What surface finishes work on Grade 13 CWSR?
Pickle in HNO₃/HF then passivate; anodize (AMS 2488 type) for colour or anti-galling; no plating needed for corrosion service — descale carefully to avoid hydrogen pickup.
Can Grade 13 CWSR be formed, bent or molded?
Good cold formability at low strain rates (bend radius ≈ 2–3 t); hot form 600–750 °C, allow generous springback and avoid chlorinated or lead-bearing lubricants.
What is the maximum service temperature of Grade 13 CWSR?
Grade 13 CWSR is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Grade 13 Annealed and Grade 13 CWSR?
Annealed is the default condition — standard supply condition for all corrosion-service product forms; maximum ductility and formability. CWSR: pick for cold-drawn tubing or wire where higher strength and tighter dimensional control are needed without losing corrosion performance. Yield strength is 240 MPa in Annealed versus 390 MPa in CWSR.
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 B338 / B861 — Titanium Tube and Pipe — ASTM International (2021)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials (Titanium) — ASM International (2005)
- Corrosion-Resistant Titanium Grades (Ru/Pd-enhanced) technical bulletin — TIMET / ATI (2018)
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.