Titanium Ti Grade 37 CWSR
Heat-treated state
UNS R52815 · ASTM Grade 37
CWSR = cold Worked + Stress Relieved
Higher-strength condition for cold-drawn condenser/heat-exchanger tubing where wall thickness is minimised.
Values for the CWSR condition
Other Ti Grade 37 tempers and conditions
Ti Grade 37 is listed in 5 conditions; see the grade overview at Ti Grade 37.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot Rolled + Annealed | Heavy plate condition for pressure-vessel shells, tubesheets and clad/loose-lining work. | 335 | 440 | 24 | 165 HB | 3.1 % IACS |
As-welded deposit | Welded-and-annealed tube per ASTM B338/B862 where cost matters more than the seamless premium. | 345 | 445 | 22 | 175 HB | 3.1 % IACS |
AnnealedDefault mill annealed sheet, plate, bar and tube | Standard supply condition for ASTM B265/B338/B348 Grade 37; pick for forming, welding and pressure-vessel fabrication. | 350 | 450 | 25 | 170 HB | — |
Cold Rolled + Annealed | Choose for plate-heat-exchanger plates and thin pressed parts needing a clean, flat, deep-drawable surface. | 360 | 460 | 24 | 175 HB | 3.1 % IACS |
CWSRThis page Cold Worked + Stress Relieved | Higher-strength condition for cold-drawn condenser/heat-exchanger tubing where wall thickness is minimised. | 480 | 550 | 15 | 205 HB | 3 % IACS |
What is Ti Grade 37 CWSR?
Ti Grade 37 CWSR is Ti Grade 37 heat treated to CWSR — higher-strength condition for cold-drawn condenser/heat-exchanger tubing where wall thickness is minimised. Ti Grade 37 CWSR has a yield strength of 480 MPa (69.6 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 62% of titanium grades. Elongation at break is 15% and the elastic modulus is 105 GPa (15.2 Msi). Ti Grade 37 CWSR has a density of 4.48 g/cm³ (0.162 lb/in³), lighter than 71% 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
- Conducts heat well — 17 W/m·K (9.82 BTU/hr·ft·°F), better than 84% of titanium grades
Limitations
- Limited service temperature — 250°C (482 °F), worse than 99% of titanium grades
Ti Grade 37 CWSR properties
Typical room-temperature values for Ti Grade 37 CWSR; 22 are specific to this condition. Other listed values are Ti Grade 37 reference data and may not represent this condition. Bars are the position among titanium grades.
Physical3
Ti Grade 37 CWSR has a density of 4.48 g/cm³ (0.162 lb/in³), lighter than 71% of titanium grades. It melts at 1,650°C (3,002 °F).
Mechanical16
Ti Grade 37 CWSR has a yield strength of 480 MPa (69.6 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 62% of titanium grades. Elongation at break is 15% and the elastic modulus is 105 GPa (15.2 Msi).
Thermal6
Ti Grade 37 CWSR is rated for continuous service to 250°C (482 °F). It conducts heat at 17 W/m·K (9.82 BTU/hr·ft·°F), better than 84% of titanium grades. Thermal expansion is 8.8 µm/m·K (4.89 µin/in·°F).
Electrical3
Ti Grade 37 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 Ti Grade 37 CWSR takes about 650 MJ of energy and emits 38 kg of CO₂ — less than 75% of titanium grades. Typical recycled content is 25%.
Manufacturability8
Ti Grade 37 CWSR's machinability is poor (30/100, better than 64% of titanium grades); weldability excellent (85/100); formability good (55/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Ti Grade 37 CWSR
Is Ti Grade 37 easy to machine?
Machine like CP Ti: low surface speed (~30–45 m/min carbide), heavy positive rake, sharp tools, generous flood coolant and no dwell — work hardens and galls, and fine chips are a fire hazard.
Can Ti Grade 37 be welded?
Excellent GTAW/plasma/EB weldability with matching or CP filler; requires trailing shield and back purge to keep the weld and HAZ below ~500 °C in air and interstitial pickup low.
Can Ti Grade 37 be formed, bent or molded?
Cold forms readily but with high springback and a bend radius of about 2.5–3 t; warm forming at 200–350 °C sharply reduces springback and cracking.
What surface finishes work on Ti Grade 37?
Pickle in HNO3/HF after hot work to strip alpha case, then colour anodise, glass-bead or electropolish; avoid iron contamination from steel tooling to preserve corrosion performance.
Ti Grade 37 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 |
|---|---|---|
| Alalloying addition that reduces hydrogen absorption | 1 – 2 | 1.5 |
| Fe | ≤ 0.3 | 0.1 |
| Ointerstitial; main strength driver | ≤ 0.25 | 0.12 |
| C | ≤ 0.08 | 0.02 |
| N | ≤ 0.03 | 0.01 |
| Hlower limits often specified for thin sheet | ≤ 0.02 | 0.01 |
| Residuals, each | ≤ 0.1 | — |
| Residuals, total | ≤ 0.4 | — |
| Ti | balance | — |
Ti Grade 37 CWSR — frequently asked
What is Ti Grade 37 CWSR used for?
Ti Grade 37 CWSR is typically used for formed pressure-vessel components, process piping and elbows, welded tank shells and heads, heat-exchanger plates and shells, formed sheet-metal ducting for corrosive service and flanges and pipe fittings. In short: weldable pressure-grade titanium; formability of CP titanium; strength above Grade 2.
What is the yield strength of Ti Grade 37 CWSR?
Ti Grade 37 CWSR has a typical yield strength of 480 MPa (69.6 ksi) and a tensile strength of 550 MPa (79.8 ksi) — weaker than 62% of titanium grades. Strength varies by condition: see the 5 listed tempers.
Is Ti Grade 37 CWSR easy to machine?
Not especially — machinability is rated poor (30/100, better than 64% of titanium grades). Machine like CP Ti: low surface speed (~30–45 m/min carbide), heavy positive rake, sharp tools, generous flood coolant and no dwell — work hardens and galls, and fine chips are a fire hazard.
Can Ti Grade 37 CWSR be welded?
Yes — weldability is rated excellent (85/100). Excellent GTAW/plasma/EB weldability with matching or CP filler; requires trailing shield and back purge to keep the weld and HAZ below ~500 °C in air and interstitial pickup low.
What surface finishes work on Ti Grade 37 CWSR?
Pickle in HNO3/HF after hot work to strip alpha case, then colour anodise, glass-bead or electropolish; avoid iron contamination from steel tooling to preserve corrosion performance.
Can Ti Grade 37 CWSR be formed, bent or molded?
Cold forms readily but with high springback and a bend radius of about 2.5–3 t; warm forming at 200–350 °C sharply reduces springback and cracking.
What is the maximum service temperature of Ti Grade 37 CWSR?
Ti Grade 37 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 Ti Grade 37 Annealed and Ti Grade 37 CWSR?
Annealed is the default condition — standard supply condition for ASTM B265/B338/B348 Grade 37; pick for forming, welding and pressure-vessel fabrication. CWSR: higher-strength condition for cold-drawn condenser/heat-exchanger tubing where wall thickness is minimised. Yield strength is 350 MPa in Annealed versus 480 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 — Seamless and Welded Titanium Tubes for Condensers and Heat Exchangers — ASTM International (2021)
- ASTM B862 — Titanium and Titanium Alloy Welded Pipe — ASTM International (2019)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Materials Properties Handbook: Titanium Alloys — ASM International (1994)
- Titanium mill product data (low-alloy corrosion grades) — Kobe Steel / TIMET (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.