What Is CP Grade 1 Titanium Pipe?
May 14, 2026
What Is CP Grade 1 Titanium Pipe?
GR1 titanium pipe is made from unalloyed titanium Grade 1 (CP Grade 1, commercially pure). GR1 titanium is characterized by optimal plasticity and excellent cold formability. GR1 titanium tube has high impact toughness and is easily weldable in any condition.
GR1 titanium is subjected to deep drawing and used for manufacturing plates, frame elements, and heat exchangers. ASTM B338 grade 1 pipe is also used as a material for explosive bonding during plate cladding. The material is refractory and is sometimes used in dentistry for making impressions, crowns, and jaw components.
Chemical Composition of GR1 Titanium Tube
GR1 titanium chemical composition limits:
| Grade | C max | H max | O max | N max | Fe max | Total Impurities max | Other Elements each max | Ti |
|---|---|---|---|---|---|---|---|---|
| Ti Grade 1 | 0.08 | 0.015 | 0.18 | 0.05 | 0.20 | 0.4 | 0.1 | Balance |
Mechanical Properties of GR1 Titanium Pipe
GR1 titanium tube mechanical properties (minimum requirements):
| Property | Value (Min) |
|---|---|
| Tensile strength (min) | 240 MPa (35 ksi) |
| GR1 titanium yield strength (0.2% offset, min) | 138 MPa (20 ksi) |
| Elongation (min) | 24% |
Typical properties at tension (for reference):
| Property | Typical Value |
|---|---|
| Tensile strength (typical) | 345 MPa (50 ksi) |
| GR1 titanium yield strength (typical) | 221 MPa (32 ksi) |
| Elongation (typical) | 37% |
Grade 1 titanium hardness is approximately 70 HRB. GR1 titanium yield strength minimum is 138 MPa, which is the lowest among CP titanium grades, making GR1 titanium for deep drawing the preferred choice.
Physical Properties of UNS R50250 Titanium Pipe
| Property | Value |
|---|---|
| Titanium grade 1 density | 4.51 g/cm³ |
Applicable Standards for GR1 Titanium Tube
| Standard | Product Form |
|---|---|
| ASTM B338 | Seamless and welded tubes for condensers and heat exchangers |
| ASTM B861 | Seamless tubes |
| ASTM B862 | Welded tubes |
| ASTM B265 | Strips, sheets, plates (reference) |
| ASTM B348 | Bars and billets |
| ASTM B363 | Seamless and welded fittings |
| ASTM B367 | Castings |
| ASTM B381 | Forgings |
ASTM B861 grade 1 titanium tube (seamless) and ASTM B862 GR1 (welded) are the primary specifications for GR1 titanium tube. ASTM B338 grade 1 pipe covers tubes for condensers and heat exchangers.
Equivalent Grades for GR1 Titanium Pipe
| Standard | Designation |
|---|---|
| UNS | R50250 |
| W. Nr. | 3.7025 |
| BS | 2TA1, 2TA4 |
| ISO | Grade 1ELI |
| GOST | BT1-00 |
| ASTM | Grade 1 (CP Class 1) |
| ASME | SB338, SB861 |
Applications of GR1 Titanium Tube
| Industry | Application |
|---|---|
| Heat exchangers | GR1 titanium heat exchanger tubes – condensers, heat exchange equipment |
| Chemical processing | GR1 titanium for chemical processing – corrosion-resistant piping |
| Deep drawing | GR1 titanium for deep drawing – components requiring high formability |
| Frame elements | Structural components |
| Explosive bonding | Cladding material for plate bonding |
| Dentistry | Crowns, jaw components (refractory property) |
| Condensers | GR1 titanium reactor and condenser tubing |
FAQ
Q1: What is CP Grade 1 titanium pipe?
A: CP Grade 1 titanium pipe is made from unalloyed titanium Grade 1, also known as commercially pure titanium. GR1 titanium pipe is characterized by optimal plasticity, excellent cold formability, high impact toughness, and easy weldability. GR1 titanium tube is the softest and most ductile of all commercially pure titanium grades.
Q2: What is the UNS number for ASTM B861 grade 1 titanium tube?
A: The UNS number for ASTM B861 grade 1 titanium tube is R50250. ASTM B338 grade 1 titanium pipe also uses UNS R50250. The Werkstoff number is 3.7025. Other equivalents include BS 2TA1/2TA4, ISO Grade 1ELI, and GOST BT1-00.
Q3: What is the minimum yield strength of GR1 titanium pipe?
A: The minimum GR1 titanium yield strength (0.2% offset) for GR1 titanium pipe is 138 MPa (20 ksi). Typical values are around 221 MPa (32 ksi). This low yield strength makes GR1 titanium for deep drawing the preferred choice for forming operations.
Q4: What is the density of titanium grade 1 pipe?
A: Titanium grade 1 density is 4.51 g/cm³. This low density gives GR1 titanium pipe excellent strength-to-weight ratio while maintaining good mechanical properties.
Q5: What is the chemical composition of GR1 titanium tube?
A: GR1 titanium chemical composition limits are: C max 0.08%, H max 0.015%, O max 0.18%, N max 0.05%, Fe max 0.20%, total impurities max 0.4%. GR1 titanium has balance titanium. The low oxygen content (0.18% max) is responsible for the material's superior ductility.
Q6: What are the applicable standards for GR1 titanium pipe?
A: For GR1 titanium pipe and GR1 titanium tube, the applicable ASTM standards are ASTM B338 (seamless and welded tubes for condensers and heat exchangers), ASTM B861 (seamless tubes), and ASTM B862 (welded tubes). ASME equivalents include SB338 and SB861.
Inspection
| Test | Purpose |
|---|---|
| Chemical analysis | Verify GR1 titanium chemical composition (C, H, O, N, Fe, impurities) |
| Tensile testing | Confirm tensile strength (≥240 MPa), GR1 titanium yield strength (≥138 MPa), elongation (≥24%) |
| Hardness testing | Verify grade 1 titanium hardness |
| Dimensional inspection | Check OD, wall thickness, length |
| Surface inspection | Check for defects |
| Ultrasonic testing | Detect internal flaws in GR1 titanium pipe |
| Eddy current testing | Surface defect detection on GR1 titanium tube |
| Hydrostatic testing | Pressure integrity for ASTM B338 grade 1 pipe |
Packaging
| Packaging Step | Description |
|---|---|
| 1. End protection | Plastic end caps on both ends of each GR1 titanium tube |
| 2. Inner wrapping | Plastic / VCI paper wrapped around GR1 titanium pipe |
| 3. Bundling | Steel straps securing bundles of GR1 titanium tube |
| 4. Wooden case | Suitable for long-distance transport by air or sea shipping |
| 5. Labeling | Grade (GR1), standard (ASTM B338/B861/B862), dimensions, heat number |
| 6. Documentation pouch | Waterproof pouch with packing list and mill test certificate |
Factory Equipment
| Equipment | Function |
|---|---|
| VAR furnace | Vacuum Arc Remelting for high-purity titanium ingot |
| Extrusion press | Forms GR1 titanium pipe hollows from billet |
| Cold pilger mill | Reduces diameter and wall thickness of GR1 titanium tube |
| Annealing furnace | Stress relief – produces annealed condition |
| Pickling line | Removes oxide scale from GR1 titanium surface |
| Straightening machine | Corrects bending of GR1 titanium pipe |
| Cutting machine | Precision length cutting |
| Welding equipment | For welded ASTM B862 GR1 titanium tube |
| Ultrasonic tester | Non-destructive inspection |
| Eddy current tester | Surface defect detection |
| Hydrostatic tester | Pressure testing |
| Tensile testing machine | Mechanical property verification |
