What’s the difference between TA1 and Grade 1 titanium? YJGF
There is no difference – they are exactly the same material, just referred to in different naming systems used internationally. TA1 is the Chinese designation and Grade 1 (ASTM designation) is the U.S./Western standard for commercially pure titanium (CP‑Ti)
Equivalency At a Glance
- TA1 (China GB/T) = Grade 1 titanium (ASTM B265 / B348, UNS R50250)
- Sometimes also called TP270, JIS Class 1 (Japan), or 3.7025 in various national standards
Grade 1/TA1 Titanium Overview
- Softest and most ductile of all commercially pure titanium grades
- Excellent corrosion resistance
- Highly formable and weldable
- Commonly used in chemical process equipment, marine structures, deep-drawn parts, medical devices, and architectural applications
Typical composition limits include max ~0.18 % oxygen and ~0.20 % iron, with titanium making up the rest
When the names differ
- TA1 is used in Chinese national standards (GB/T)
- Grade 1 is the Western/ASTM designation
- Mechanically and chemically, both are identical materials
Summary Table
| Designation | Origin/Standard | Equivalent Material |
|---|---|---|
| TA1 | Chinese GB/T | ASTM/UNS Grade 1 CP‑Ti |
| Titanium Grade 1 (Gr 1) | ASTM / UNS R50250 | Chinese TA1 |
Bottom Line
You can safely treat TA1 and Grade 1 titanium as the same material. The naming difference reflects national standards and documentation practices, but they are interchangeable in specification and usage.
