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ASTM Grade 2 Titanium and Its Equivalents

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.

GradesCHONFeOtherTotal 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--
*All chemical compositions are in mass fraction unit, %; Titanium content takes the remaining value.

GradeTensile 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-0390~540 [57~78]-20
BS 25-35t/in2382~530 [55~77]≥285 [41]22
JIS Class 2343~510 [50~74]≥215 [31]23
GB TA2≥441 [64]≥373 [54]20
*All mechanical properties shall be tested at room temperature.

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