Titanium VT1-0 and Grade 2 (GR2) are commercially pure titanium alloys. However, they have different designations based on the standards they adhere to. VT1-0 is a Russian designation according to the GOST-23755 standard, while GR2 follows the ASTM B265 standard. Here are the main differences between the two designations:
- Chemical Composition:
| Composition, % | C | O | N | H | Fe |
| Gr2 | 0.08 | 0.25 | 0.03 | 0.015 | 0.3 |
| VT1-0 | 0.07 | 0.2 | 0.03 | 0.01 | 0.25 |
2. Mechanical Properties (Typical Ranges):
| VT1-0 | Thick | Tensile Strength, min | Yield Strength | Elongation |
| 11~60mm | 343 | 275 | 20 | |
| 60~130mm | 295 | 216 | 15 | |
| Gr2 | All | 345 | 275~450 | 20 |
VT1-0 (GOST-23755): Tensile Strength 343-540 MPa, Yield Strength ≥216 MPa, Elongation ≥15%, Hardness ≤195 HB
Grade 2 (ASTM B265): Tensile Strength 345-550 MPa, Yield Strength ≥275 MPa, Elongation ≥20%, Hardness ≤120 HB
3. Standard Specification:
VT1-0 (GOST-23755): GOST-23755 is the Russian national standard for titanium and its alloys. It specifies the requirements for chemical composition, mechanical properties, and other characteristics of titanium materials.
Grade 2 (ASTM B265): ASTM B265 is an internationally recognized standard from the American Society for Testing and Materials (ASTM). It covers the requirements for unalloyed titanium plates, sheets, and strips used in various industrial applications.
4. International Recognition:
VT1-0 (GOST-23755): The GOST-23755 standard is primarily recognized and used within Russia and countries that follow Russian industrial standards.
Grade 2 (ASTM B265): ASTM B265 is widely accepted and used globally as a standard specification for titanium and its alloys.
The main difference between the two alloys is their oxygen content, which is lower in VT1-0 than in GR2. In terms of mechanical properties, GR2 exhibits slightly higher strength, yield, and elongation values than VT1-0, making it a better choice for applications that require high strength and ductility while maintaining excellent corrosion resistance.
Overall, both VT1-0 and GR2 are commercially pure titanium alloys suitable for various applications. However, the higher oxygen content and higher ductility of GR2 make it a more versatile and commonly used alloy in industries such as aerospace, chemical processing, medical, and marine.
