The ASTM B265 Titanium GR 1 Sheet
What is ASTM B265 Titanium Grade 1?
ASTM B265 is the standard specification for titanium and titanium alloy strip, sheet, and plate. It covers commercially pure grades (GR1, GR2, GR3, GR4) and alloy grades (GR5, GR7, GR9, etc.), defining chemical composition, mechanical properties, and testing requirements.
Gr1 titanium sheet is a high quality commercially pure titanium sheet made from grade 1 titanium.Ti Gr1 titanium sheet manufacturers are a popular choice for its excellent strength, low weight, and good corrosion resistance, making it suitable for many applications in the aerospace, marine, industrial, and medical industries.
Technique: Cold Rolled, hot rolled
Grade: GR1 Ti (Min):99.5%
Product Name: Gr1 Titanium Sheet, grade 1 titanium plate
Material: grade 1 Titanium
Surface:Polished/Pickling
Certification:ISO9001:2015,EN10204 3.1,EN10204 3.2
Standard:ASMESB265 ASTM B265
Chemical Composition of Grade 1
| Element | Composition Limit (%) | Significance |
|---|---|---|
| Titanium | Balance | Base material |
| Oxygen (max) | 0.18% | Lowest among CP grades for maximum ductility |
| Iron (max) | 0.20% | Impurity control |
| Carbon (max) | 0.08% | Maintains purity |
| Nitrogen (max) | 0.03% | Minimized for ductility |
| Hydrogen (max) | 0.015% | Prevents hydride formation |
Mechanical Properties
| Property | Value (Minimum) |
|---|---|
| Tensile Strength | 240 MPa (35 ksi) |
| Yield Strength (0.2% offset) | 170-310 MPa (25-45 ksi) typical |
| Elongation (in 2" or 50mm) | 24% minimum |
| Reduction of Area | 30% minimum |
| Hardness (HRB) | ~70 typical |
| Modulus of Elasticity | 103 GPa (15 × 10⁶ psi) |
Physical Properties
| Property | Value |
|---|---|
| Density | 4.51 g/cm³ (0.163 lb/in³) |
| Melting Point | 1668°C (3034°F) |
| Thermal Conductivity | 16.4 W/m·K |
| Coefficient of Thermal Expansion | 8.6 µm/m·°C (20-100°C) |
| Electrical Resistivity | 0.56 µΩ·m |
| Magnetic Properties | Non-magnetic |
| Specific Heat | 0.523 J/g·°C |
Standard Sheet Dimensions (ASTM B265)
| Thickness Range (mm) | Thickness Range (inches) | Width Range (mm) | Length Range (mm) |
|---|---|---|---|
| 0.3 – 0.5 mm | 0.012" – 0.020" | 1000 – 1220 mm | 2000 – 3660 mm |
| 0.5 – 1.0 mm | 0.020" – 0.040" | 1000 – 1500 mm | 2000 – 4000 mm |
| 1.0 – 2.0 mm | 0.040" – 0.080" | 1000 – 2000 mm | 2000 – 6000 mm |
| 2.0 – 3.0 mm | 0.080" – 0.120" | 1000 – 2500 mm | 2000 – 6000 mm |
| 3.0 – 4.75 mm | 0.120" – 0.187" | 1000 – 3000 mm | 2000 – 6000 mm |
GR1 vs Other Titanium Grades
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Typical Applications |
|---|---|---|---|---|
| GR1 | 240 | 170-310 | 24 | Deep drawing, severe forming |
| GR2 | 345 | 275-450 | 20 | General purpose, most common |
| GR3 | 450 | 380-550 | 18 | Higher strength applications |
| GR4 | 550 | 480-655 | 15 | Maximum strength CP grade |
| GR5 | 895 | 825-910 | 10 | Aerospace, high strength |
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Q1: What is the difference between GR1 and GR2 titanium sheet?
The primary difference is oxygen content:
GR1: 0.18% O max – Lower strength, higher ductility
GR2: 0.25% O max – Moderate strength, good formability
Choose GR1 when maximum formability is required (deep drawing, complex shapes). Choose GR2 for general applications where some strength is needed.
Q2: Can GR1 titanium sheet be heat treated?
GR1 is typically used in the annealed condition and is not heat treatable for strengthening. It can be stress relieved after forming at 480-595°C (900-1100°F) for 30-120 minutes, followed by air cooling.
Q3: How does GR1 perform in seawater?
Excellent. GR1 is virtually immune to seawater corrosion, including pitting, crevice corrosion, and stress corrosion cracking. It has been used in seawater applications for over 50 years with no reported corrosion failures.
Q4: What surface finish is best for welding?
For welding applications, pickled or cleaned surfaces are recommended to remove oxides and contaminants. Mill scale should be removed from the weld area before welding.
Q5: Is GR1 titanium sheet suitable for cryogenic applications?
Yes. GR1 maintains excellent ductility and toughness at cryogenic temperatures down to -269°C, making it ideal for liquid hydrogen and helium applications.
Our factory
Our factory is equipped with a comprehensive range of advanced production and quality testing machinery to ensure the highest quality titanium products. On the production side, we have vacuum arc remelting (VAR) furnaces for high-purity ingot melting, hydraulic forging presses and rolling mills for breakdown and shaping, pilger mills and cold drawing benches for precision tube and rod forming, annealing furnaces (both vacuum and atmosphere-controlled) for heat treatment, and precision cutting saws and surface grinding/polishing lines for finishing. For quality control, our testing laboratory is equipped with optical emission spectrometers (OES) for chemical composition analysis, universal testing machines (UTM) for tensile and mechanical properties, ultrasonic flaw detectors and eddy current testers for internal and surface defect detection, hardness testers (Rockwell, Brinell, Vickers), metallographic microscopes for microstructure evaluation, and hydrostatic testers for pressure integrity verification of tubes and pipes.
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