What is the equivalent of Grade 2 titanium?
Dec 10, 2025
What is GR2 titanium material?
Titanium Grade 2 (GR2, UNS R50400, W.Nr. 3.7035) is used for welding commercially pure titanium, where low weight, high corrosion resistance and good mechanical strength are essential.
This filler material is particularly suitable for applications in marine environments, chemical process industries and medical engineering structures.
The weld metal deposited with Titanium GR2 has excellent resistance to seawater, chlorides, acids and other corrosive media, while maintaining high toughness and formability. The material is biocompatible, making it suitable for welding medical implants and equipment.
The weld metal from Titanium GR2 is not hardenable by heat treatment and exhibits the same high corrosion resistance as the base metal. It is used globally in industries such as offshore, aerospace, energy and power generation, and the oil and gas industry, where operational reliability and long service life are critical.
What is the equivalent of Grade 2 titanium?
Designated as UNS R50400, the ASTM Grade 2 titanium (commercially pure titanium) has several international equivalents which include DIN 3.7035 (German), GOST BTI-0 (Russian), BS 25-35t/in2 (British), JIS Class 2 (Japanese), Gr. TA2 (Chinese GB). Their chemical compositions and mechanical properties are listed in below two tables respectively.
| Grades | C | H | O | N | Fe | Other | Total Others |
|---|---|---|---|---|---|---|---|
| ASTM Gr.2 | ≤0.10 | ≤0.010 | ≤0.25 | ≤0.03 | ≤0.30 | - | - |
| DIN 3.7035 | ≤0.08 | ≤0.013 | ≤0.20 | ≤0.06 | ≤0.25 | - | - |
| GOST BTI-0 | ≤0.07 | ≤0.010 | ≤0.20 | ≤0.04 | ≤0.30 | - | ≤0.30 |
| BS 25-35t/in2 | - | ≤0.0125 | - | - | ≤0.20 | - | - |
| JIS Class 2 | - | ≤0.015 | ≤0.20 | ≤0.05 | ≤0.25 | - | - |
| GB TA2 | ≤0.10 | ≤0.015 | ≤0.25 | ≤0.05 | ≤0.30 | - | - |
| Grade | Tensile Strength, MPa [ksi] |
Yield Strength, MPa [ksi] |
Elongation, % |
|---|---|---|---|
| ASTM Gr.2 | ≥343 [50] | 275~410 [40~60] | 20 |
| DIN 3.7035 | ≥372 [54] | ≥245 [35.5] | 22 |
| GOST BTI-0 | 390~540 [57~78] | - | 20 |
| BS 25-35t/in2 | 382~530 [55~77] | ≥285 [41] | 22 |
| JIS Class 2 | 343~510 [50~74] | ≥215 [31] | 23 |
| GB TA2 | ≥441 [64] | ≥373 [54] | 20 |
Chemical Composition
| Weight % | C | Fe | O | N | H | Ti |
| Min. | ||||||
| Max. | 0,080 | 0,30 | 0,25 | 0,03 | 0,015 | Bal. |
Mechanical Properties
| Yield strength Rp0.2, MPa |
Tensile strength Rm, MPa |
Elongation [%] |
Hardness [HRB] |
Impact, Charpy-V [J] |
|
| Min. | 276 | 345 | 20 | 160 | |
| Max. | 448 |
What Is the Difference Between Gr2 and Gr5 Titanium?
Titanium Gr2 and Gr5 differ primarily in strength, corrosion resistance, workability, and cost. Gr2 is a commercially pure titanium with a tensile strength of 344 MPa, offering excellent corrosion resistance, especially in marine and chemical environments. It is also lightweight and easy to form and weld, making it a preferred choice for applications requiring simple fabrication and long-term durability in corrosive conditions.
In contrast, Gr5 (Ti-6Al-4V) is an alloy containing 6% aluminum and 4% vanadium, which significantly increases its strength (1000 MPa tensile strength) and fatigue resistance. This makes Gr5 ideal for aerospace, automotive, and medical applications, where high performance and durability are required. However, Gr5 is more expensive and slightly harder to machine due to its added alloying elements.
Gr2 is best for corrosion resistance and easy fabrication, while Gr5 is ideal for high-strength applications like aerospace and automotive.
| Property | Gr2 Titanium | Gr5 Titanium |
|---|---|---|
| Strength | Moderate (344 MPa) | High (1000 MPa) |
| Corrosion Resistance | Excellent | Very good |
| Weight | Lightweight | Slightly heavier |
| Workability | Easy to form and weld | More difficult to form |
| Cost | Lower | Higher due to alloying elements |
why choose us
We provide a comprehensive range of titanium materials and fabricated parts, including:
Titanium Tubes & Pipe: Seamless and welded tubing in commercial and aerospace grades (Gr1, Gr2, Gr5, Gr7, Gr9, Gr12), suitable for heat exchangers, condenser tubes, and piping systems.
Titanium Bars & Rods: Round bars, hex bars, and square bars in hot-rolled, forged, and cold-drawn conditions, available in various diameters and lengths.
Titanium Plate & Sheet: Plates, sheets, and strips in standard and custom dimensions, ideal for pressure vessels, chemical processing, and marine applications.
Titanium Wire & Foil: Fine wire for welding, fasteners, and medical applications, alongside ultra-thin foil for specialized industrial uses.
Precision Titanium CNC Machining Parts: Custom-engineered components, fittings, flanges, fasteners, and intricate parts machined from titanium billets, bars, or plates with tight tolerances.
For quotes, technical specifications, or to discuss your project requirements for titanium tubes, bars, plates, sheets, wire, foil, or custom CNC machined components, please contact our team.
Email us at: info@gneemetal.com
