what is different between TA1 and Gr1?

what is different between TA1 and Gr1?

Actually, they’re not different at all, but equivalent

Equivalence in Naming

  • TA1 is the Chinese designation for commercially pure titanium and corresponds directly to ASTM Grade 1 in the U.S. system. Both refer to the same material—CP-Ti Grade 1, the softest and most ductile of the commercially pure titanium grades

Characteristics of TA1 / Grade 1

  • Ultra-high purity—minimal levels of impurity elements like iron, oxygen, carbon, nitrogen, and hydrogen
  • Excellent formability and ductility, making it ideal for intricate forming processes like deep drawing. It also boasts outstanding corrosion resistance and impact toughness
  • Typical mechanical properties include:
  • Tensile Strength: about 240 MPa
  • Yield Strength: around 170 MPa
  • Elongation: ≥ 24%

Summary Table

TermMeaning/Equivalence
TA1Chinese designation for CP-Ti Grade 1
Grade 1ASTM/U.S. designation, same material as TA1
Key TraitsSoftest, most ductile, excellent corrosion resistance

In short: TA1 = Grade 1. It’s just two ways to refer to the same commercially pure titanium with exceptional formability and corrosion resistance.