GR1 Titanium Pipe Standards and Specifications
May 15, 2026
Available Forms of GR1 Titanium
| Form | Application |
|---|---|
| GR1 titanium pipe | General piping |
| GR1 titanium tube | Heat exchangers, condensers |
| GR1 titanium seamless tube | High pressure applications |
| GR1 titanium welded tube | Large diameter, cost-effective |
| GR1 titanium bar | Fasteners, shafts |
| GR1 titanium wire / welding wire | Filler metal, mesh |
| GR1 titanium plate / sheet | Cladding, vessels |
| GR1 titanium forging | Custom components |
GR1 Titanium Pipe and Tube Standards
| Standard | Product Form | Description |
|---|---|---|
| ASTM B861 / ASME SB-861 | GR1 titanium seamless tube | Seamless tube for general service |
| ASTM B862 / ASME SB-862 | GR1 titanium welded tube | Welded tube for general service |
| ASTM B337 / ASME SB-337 | GR1 titanium pipe | General pipe specification |
| ASTM B363 / ASME SB-363 | GR1 titanium pipe fittings | Seamless and welded fittings |
| ASTM B348 / ASME SB-348 | GR1 bar | Rods and billets |
| ASTM B265 / ASME SB-265 | GR1 sheet / plate | Strip, sheet, plate |
| ASTM B381 / ASME SB-381 | GR1 forging | Forged components |
| ASTM B367 / ASME SB-367 | GR1 casting | Cast components |
GR1 Titanium Properties
GR1 titanium is the first of the commercially pure titanium alloys. All four CP grades (GR1, GR2, GR3, GR4) contain more than 99% titanium.
| Property | Value |
|---|---|
| Titanium grade 1 density | 4.51 g/cm³ |
| Melting point | 1670°C |
| Elastic modulus | 105-120 kN/mm² |
| GR1 titanium yield strength (annealed) | 170-310 MPa |
| Tensile strength (annealed) | 240-400 MPa |
| Elongation (annealed) | 24-37% |
GR1 Titanium Key Characteristics
GR1 titanium tube offers:
| Characteristic | Benefit |
|---|---|
| Easy to machine | GR1 titanium machinability is excellent |
| Easy to form | GR1 titanium forming/bending is straightforward |
| Softest and most ductile | Best choice for GR1 titanium for deep drawing |
| Excellent weldability | How to weld GR1 titanium – use matching composition filler |
| High corrosion resistance | Suitable for seawater and many chemicals |
| Good oxidation resistance | Stable oxide layer |
How to weld GR1 titanium: Use filler material of the same composition (pure titanium). GR1 titanium can be welded with matching filler metal.
GR1 Titanium Chemical Composition
| Element | Min % | Max % |
|---|---|---|
| N | – | 0.03 |
| C | – | 0.08 |
| H | – | 0.01 |
| Fe | – | 0.20 |
| O | – | 0.18 |
| Residuals | – | 0.40 |
| Ti | bal | – |
GR1 Titanium Equivalent Standards
| Standard | Designation |
|---|---|
| UNS | R50250 |
| W. Nr. | 3.7025 |
| AWS | 150 |
| ASTM | Grade 1 |
FAQ
Q1: What ASTM standard applies to GR1 titanium seamless tube?
A: ASTM B861 / ASME SB-861 is the standard for GR1 titanium seamless tube. For welded GR1 titanium tube, use ASTM B862 / ASME SB-862. Both standards cover commercially pure titanium Grade 1 (UNS R50250).
Q2: What standard applies to GR1 titanium pipe fittings?
A: ASTM B363 / ASME SB-363 covers seamless and welded fittings made from GR1 titanium. This includes elbows, tees, reducers, and caps for GR1 titanium pipe systems.
Q3: What is the difference between ASTM B861 and ASTM B862 for GR1 titanium tube?
A: ASTM B861 covers GR1 titanium seamless tube (no weld seam). ASTM B862 covers GR1 titanium welded tube (longitudinal weld). Both have the same chemical composition and mechanical property requirements. Choose seamless for high pressure, welded for larger diameters or cost savings.
Q4: Is GR1 titanium pipe available from stock?
A: Yes, GR1 titanium tube in stock is available from GR1 titanium tube suppliers in both seamless (ASTM B861) and welded (ASTM B862) forms. GR1 titanium pipe ready to ship can be dispatched within days.
Q5: What filler metal is required for welding GR1 titanium tube?
A: How to weld GR1 titanium requires filler metal of the same composition – pure titanium. Use ERTi-1 filler wire. The filler material should match the base metal composition to ensure weld integrity and corrosion resistance.
Q6: Can GR1 titanium tube be used for heat exchangers?
A: Yes. ASTM B861 and ASTM B862 seamless and welded tubes are commonly used for GR1 titanium heat exchanger applications. The material offers excellent corrosion resistance in seawater and chemical environments.
Q7: What is the difference between GR1, GR2, GR3, and GR4?
A: GR1 titanium has the lowest oxygen content (0.18% max) and is the softest and most ductile. GR2 has 0.25% O, GR3 has 0.35% O, GR4 has 0.40% O. As oxygen increases, strength increases and ductility decreases. GR1 titanium for deep drawing is the best choice among CP grades.
Q8: Is GR1 titanium suitable for medical applications?
A: Yes. ASTM F67 covers medical grade 1 titanium for surgical implants. GR1 titanium (UNS R50250) is biocompatible and offers excellent corrosion resistance in body fluids.
Q9: What is the annealing temperature for GR1 titanium pipe?
A: GR1 titanium pipe is typically supplied in annealed condition. Stress relief annealing can be performed at 480°C (900°F) for 0.5-2 hours, followed by air cooling. This optimizes toughness and ductility for GR1 titanium forming/bending operations.
Q10: What is the operating temperature range for GR1 titanium tube?
A: GR1 titanium tube can operate from -200°C to +400°C (-330°F to +750°F). Within this range, GR1 titanium maintains good mechanical properties and corrosion resistance.
