Titanium Grade 1
ASTM Grade 1 · UNS R50250 · EN 3.7025 · GB TA1 · AMS 4900
Grade 1 is the softest and most ductile commercially pure titanium (UNS R50250, 3.7025, TA1), with the lowest interstitial content of the CP series.
Values for the O condition
Grade 1 tempers and conditions
Grade 1 is supplied in 4 conditions, soft to hard. O is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ODefault Annealed | Standard stocked condition: maximum ductility for deep drawing, tube expanding and explosive cladding. | 220 | 300 | 30 | 120 HB | — |
Hot rolled | Pick for thick bar, forgings and hot-rolled plate where a separate anneal is not specified; properties near annealed. | 250 | 330 | 28 | 130 HB | 3.6 % IACS |
Stress relieved | Use for cold-formed or welded parts needing dimensional stability while retaining most cold-work strength. | 310 | 380 | 18 | 150 HB | 3.6 % IACS |
Cold worked | Choose when higher strength and springiness are needed from the softest CP grade and forming is minimal. | 360 | 430 | 12 | 170 HB | — |
What is Grade 1?
Grade 1 is the softest and most ductile commercially pure titanium (UNS R50250, 3.7025, TA1), with the lowest interstitial content of the CP series. At 220 MPa yield, 300 MPa tensile, 30% elongation and 120 HB it is chosen for deep drawing and severe forming, and is stocked as sheet, strip, plate, tube and bar in annealed, hot-rolled, cold-worked or stress-relieved condition. Corrosion resistance in seawater and oxidising media is excellent and weldability is high, but it is the weakest CP grade, service is limited to about 300 °C and machinability is poor; use Grade 2 where more strength is needed. Grade 1 has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,670°C (3,038 °F). Grade 1 has a yield strength of 220 MPa (31.9 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 97% of titanium grades. Elongation at break is 30% and the elastic modulus is 103 GPa (14.9 Msi).
What is Grade 1 used for?
- Marine pipework
- Chemical processing equipment
- Heat exchanger plates and tubing
- Deep-drawn vessel heads and covers
- Electroplating anode baskets
- Desalination plant components
- Explosion-bonded clad plate
Advantages
- Conducts heat well — 20 W/m·K (11.6 BTU/hr·ft·°F), better than 98% of titanium grades
- High electrical conductivity — 3.6 % IACS, better than 98% of titanium grades
- Easy to machine — 42/100, better than 98% of titanium grades
- Ductile — tolerates forming and impact — 30%, better than 93% of titanium grades
- Readily welded — 90/100, better than 93% of titanium grades
Limitations
- Low strength — 220 MPa (31.9 ksi), worse than 97% of titanium grades
Grade 1 properties
Typical room-temperature values for Grade 1-O; bars are the position among titanium grades.
Physical3
Grade 1 has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,670°C (3,038 °F).
Mechanical16
Grade 1 has a yield strength of 220 MPa (31.9 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 97% of titanium grades. Elongation at break is 30% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal6
Grade 1 is rated for continuous service to 300°C (572 °F). It conducts heat at 20 W/m·K (11.6 BTU/hr·ft·°F), better than 98% of titanium grades. Thermal expansion is 8.6 µm/m·K (4.78 µin/in·°F).
Electrical3
Grade 1 conducts electricity at 3.6 % IACS, better than 98% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (93/100), better than 72% of titanium grades.
Sustainability4
Producing a kilogram of Grade 1 takes about 650 MJ of energy and emits 42 kg of CO₂ — less than 75% of titanium grades. Typical recycled content is 25%.
Manufacturability8
Grade 1's machinability is fair (42/100, better than 98% of titanium grades); weldability excellent (90/100); formability very good (82/100).
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 1 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Grade 1
Is Grade 1 easy to machine?
Machine at low surface speed with high feed, sharp uncoated-carbide or PVD tools, rigid setup and flood coolant; never dwell in the cut and control fine chips (fire risk).
Can Grade 1 be welded?
Excellent GTAW/plasma/EB/resistance weldability with trailing and back-purge argon; keep weld area clean and straw-coloured, avoid any iron, oxygen or moisture pickup.
Can Grade 1 be formed, bent or molded?
Best cold formability of the CP grades — deep drawing, roll forming and tube expansion are routine; allow generous bend radii (≈2t) and expect springback, warm form at 200–300 °C for tight radii.
Manufacturability
The process limits FabDigit's quote engine applies to Grade 1. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Fair42 / 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 / — |
| Hardenable after machining | No |
Sheet metal
| Formability | Better82 / 100 |
|---|---|
| Weldability | Better90 / 100 |
| Bendable | Yes |
Grade 1 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 |
|---|---|---|
| Nmax per ASTM B265 | ≤ 0.03 | 0.01 |
| C | ≤ 0.08 | 0.02 |
| Hmax; lower limits for tube/bar per product form | ≤ 0.02 | 0 |
| Fe | ≤ 0.2 | 0.08 |
| Omax; the key strength-controlling interstitial | ≤ 0.18 | 0.1 |
| Residuals (each)max 0.10 each, 0.40 total | ≤ 0.1 | |
| Ti | balance |
What surface finishes work on Grade 1?
Pickle in HNO3/HF to remove alpha case and embedded iron; colour anodizing per AMS 2488, and use plasma/oxide or lubricious coatings to combat galling since bare Ti seizes 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).
Passivation
Conversion Coating
Organic Coating
CVD Coating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Titanium Grade 1 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- R50250
- ASTM
- B265 Gr 1
- AMS
- 4900
- EN / DIN / Werkstoff-Nr.
- 3.7025
- GB (China)
- TA1
- Trade names
- CP Ti
How much does Grade 1 cost?
Grade 1 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 1 — frequently asked
What is Grade 1 used for?
Grade 1 is typically used for marine pipework, chemical processing equipment, heat exchanger plates and tubing, deep-drawn vessel heads and covers, electroplating anode baskets and desalination plant components. In short: pure formable CP titanium.
What is the yield strength of Grade 1?
Grade 1 has a typical yield strength of 220 MPa (31.9 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 97% of titanium grades. Strength varies by condition: see the 4 listed tempers.
Is Grade 1 easy to machine?
Not especially — machinability is rated fair (42/100, better than 98% of titanium grades). Machine at low surface speed with high feed, sharp uncoated-carbide or PVD tools, rigid setup and flood coolant; never dwell in the cut and control fine chips (fire risk).
Can Grade 1 be welded?
Yes — weldability is rated excellent (90/100). Excellent GTAW/plasma/EB/resistance weldability with trailing and back-purge argon; keep weld area clean and straw-coloured, avoid any iron, oxygen or moisture pickup.
What surface finishes work on Grade 1?
Pickle in HNO3/HF to remove alpha case and embedded iron; colour anodizing per AMS 2488, and use plasma/oxide or lubricious coatings to combat galling since bare Ti seizes against itself.
Can Grade 1 be formed, bent or molded?
Best cold formability of the CP grades — deep drawing, roll forming and tube expansion are routine; allow generous bend radii (≈2t) and expect springback, warm form at 200–300 °C for tight radii.
What is the maximum service temperature of Grade 1?
Grade 1 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 1-O and Grade 1-CW?
O is the default condition — standard stocked condition: maximum ductility for deep drawing, tube expanding and explosive cladding. CW: choose when higher strength and springiness are needed from the softest CP grade and forming is minimal. Yield strength is 220 MPa in O versus 360 MPa in CW.
How much does Grade 1 cost?
Grade 1 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 1?
Yes — Grade 1 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 International (2020)
- ASTM B348 – Titanium and Titanium Alloy Bars and Billets — ASTM International (2021)
- AMS 4900 – Titanium Sheet, Strip and Plate, Commercially Pure — SAE International (2018)
- GB/T 3621 (TA1) — SAC (2022)
- ASM Handbook Vol. 2: Properties and Selection — Nonferrous Alloys — ASM International (1990)
- Commercially Pure Titanium Grades 1–4 data sheet — TIMET / VSMPO (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.