Titanium Grades and Relative Properties​

Rolled Alloys provides the following information to offer a basic understanding of the various titanium grades and their relative properties.

Titanium comes in two main categories: commercially pure grades and titanium alloy grades. Titanium alloy categories include alpha-titanium, beta-titanium, and alpha-beta titanium, which correspond to different structural phases of the material. The commercially pure grades are classified as Grades 1 through 4. Each grade exhibits distinct variations in allowable element limits and strength levels. More detailed information about the chemical compositions and mechanical properties of these grades is provided below.

Grade C N O H Fe Ti
1 0.08 0.03 0.18 0.015 0.2 Bal
2 0.08 0.03 0.25 0.015 0.3 Bal
3 0.08 0.05 0.35 0.015 0.3 Bal
4 0.08 0.05 0.40 0.015 0.5 Bal

*All values are maximums unless a range is provided

Grade Tensile (ksi) Yield (ksi) Elongation (%)
1 35 20 24
2 50 40 20
3 65 55 18
4 80 70 15

*All values are minimums per ASTM B348


Three titanium alloys closely resemble commercially pure titanium being Grades 7, 11, and 12. Grade 7 is comparable to Grade 2 in terms of mechanical properties but boasts superior corrosion resistance due to the addition of up to 0.25% Pd, making it exceptionally resilient against reducing acids. Similarly, Grade 11 shares similarities with Grade 1 but includes an addition of up to 0.25% Pd, enhancing its resistance to crevice corrosion and reducing acids. Grade 12, on the other hand, features slightly higher minimum mechanical property requirements than Grade 3 but lower than Grade 4. What sets Grade 12 apart from the commercially pure grades is its composition, containing 0.60-0.90% nickel content and 0.20-0.40% molybdenum. The tables below present the chemical compositions and mechanical properties of these alloys.

Grade

C

N

O

H

Fe

Pd

Ni

Mo

Ti

7

0.08

0.03

0.25

0.015

0.30

0.12-0.25

Bal

11

0.08

0.03

0.18

0.015

0.20

0.12-0.25

Bal

12

0.08

0.03

0.25

0.015

0.30

0.60-0.90

0.20-0.40

Bal

*All values are maximums unless a range is provided

Grade

Tensile (ksi)

Yield (ksi)

Elongation (%)

7

50

40

20

11

35

20

24

12

70

50

18

*All values are minimums per ASTM B348

The next alloy, often called “6-4” or Grade 5, is the most widely used titanium alloy globally, constituting over half of the world’s titanium production. Another widely utilized variation is 6-4 ELI (Extra Low Interstitial), recognized as Grade 23, predominantly employed in the medical implant industry. All 6-4 alloys belong to the alpha-beta alloy category and can be heat-treated to achieve a wide range of properties, depending on the heat treatment applied. However, it’s worth noting that 6-4 ELI presents challenges in achieving minimum mechanical heat-treat properties due to its strict maximum oxygen requirement. Please consult the table below for detailed information on chemistry and typical mechanical properties.

Grade

Al

V

C

N

O

H

Fe

Ti

5

5.50-6.75

3.50-4.50

0.08

0.05

0.20

0.015

0.40

Bal

5 STA

5.50-6.75

3.50-4.50

0.08

0.05

0.20

0.015

0.40

Bal

23

5.50-6.50

3.50-4.50

0.08

0.03

0.13

0.0125

0.25

Bal

*All values are maximums unless a range is provided

Grade

Tensile (ksi)

Yield (ksi)

Elongation (%)

5

130

120

10

5 STA

130

120

10

23

120

110

10

*All values are minimums per ASTM B348

For more specific titanium questions, give us a call at 800-521-0332 or email us at help-tech@rolledalloys.com

Titanium Grade Chemistry Table

Grade C O N H Fe Al V Pd Ru Ni Mo Cr Co Zr Nb Sn Si Ti
1 0.08 0.18 0.03 0.015 0.20 Bal
2 0.08 0.25 0.03 0.015 0.30 Bal
3 0.08 0.35 0.05 0.015 0.30 Bal
4 0.08 0.10 0.05 0.015 0.50 Bal
5 0.08 0.20 0.05 0.015 0.40 5.50-6.75 3.50-4.50 Bal
6 0.08 0.20 0.03 0.015 0.50 4.00-6.00 2.00-3.00 Bal
7 0.08 0.25 0.03 0.015 0.30 0.12-0.25 Bal
9 0.08 0.15 0.03 0.015 0.25 2.50-3.50 2.00-3.00 Bal
11 0.08 0.18 0.03 0.015 0.20 0.12-0.25 Bal
12 0.08 0.25 0.03 0.015 0.30 0.60-0.90 0.20-0.40 Bal
13 0.08 0.1 0.03 0.015 0.20 0.04-0.06 0.40-0.60 Bal
14 0.08 0.15 0.03 0.015 0.30 0.04-0.06 0.40-0.60 Bal
15 0.08 0.25 0.05 0.015 0.30 0.04-0.06 0.40-0.60 Bal
16 0.08 0.25 0.03 0.015 0.30 0.04-0.08 Bal
17 0.08 0.18 0.03 0.015 0.20 0.04-0.08 Bal
18 0.08 0.15 0.03 0.015 0.25 2.50-3.50 2.00-3.00 0.04-0.08 Bal
19 0.05 0.12 0.03 0.02 0.30 3.00-4.00 7.50-8.50 3.50-4.50 5.50-6.50 3.50-4.50 Bal
20 0.05 0.12 0.03 0.02 0.30 3.00-4.00 7.50-8.50 0.04-0.08 3.50 5.50-6.50 Bal
21 0.05 0.17 0.03 0.015 0.40 2.50-3.50 4.50 2.20-3.20 0.15-0.25 Bal
23 0.08 0.13 0.03 0.0125 0.25 5.50-6.50 3.50-4.50 14.00-16.00 Bal
24 0.08 0.20 0.05 0.015 0.40 5.50-6.75 3.50-4.50 0.04-0.08 Bal
25 0.08 0.20 0.05 0.015 0.40 5.50-6.75 3.50-4.50 0.04-0.08 0.30-0.08 Bal
26 0.08 0.25 0.03 0.015 0.30 0.08-0.14 Bal
27 0.08 0.18 0.03 0.015 0.20 0.08-0.14 Bal
28 0.08 0.15 0.03 0.015 0.25 2.50-3.50 2.00-3.00 0.08-0.14 Bal
29 0.08 0.13 0.03 0.0125 0.25 5.50-6.50 3.50-4.50 0.08-0.14 Bal
30 0.08 0.25 0.03 0.015 0.30 0.04-0.08 0.20-0.80 Bal
31 0.08 0.35 0.05 0.015 0.30 0.04-0.08 0.20-0.80 Bal
32 0.08 0.11 0.03 0.015 0.25 4.50-5.50 0.60-1.40 0.60-1.20 0.60-1.40 0.60-1.40 0.60-0.14 Bal
33 0.08 0.25 0.03 0.015 0.30 0.01-0.02 0.02-0.04 0.35-0.55 0.10-0.20 Bal
34 0.08 0.35 0.05 0.015 0.30 0.01-0.02 0.02-0.04 0.35-0.55 0.10-0.20 Bal
35 0.08 0.25 0.05 0.015 0.20-0.80 4.00-5.00 1.10-2.10 1.50-2.50 0.20-0.40 Bal
36 0.04 0.16 0.03 0.015 0.03 42.00-47.00 Bal
37 0.08 0.25 0.03 0.015 1.20-1.80 1.00-2.00 Bal
38 0.08 0.20-0.30 0.03 0.015 3.50-4.50 2.00-3.00 Bal
*All values are maximums unless a range is provided

Titanium Grade Mechanical Property Table

Grade

Tensile (ksi)

Yield (ksi)

Elongation (%)

1

35

20

24

2

50

40

20

2H

58

40

20

3

65

55

18

4

80

70

15

5

130

150

10

6

120

115

10

7

50

40

20

7H

58

40

20

9

90

70

15

9D

90

70

12

11

35

20

24

12

70

50

18

13

40

25

24

14

60

40

20

15

70

55

18

16

50

40

20

16H

58

40

20

17

35

20

24

18

90

70

15

18D

90

70

12

19E

115

110

15

19F

135

130 to 159

10

19G

165

160 to 185

5

20E

115

110

15

20F

135

130 to 159

10

20G

165

160 to 185

5

21E

115

110

15

21F

140

130 to 159

10

21G

170

160 to 185

8

23

120

110

10

23D

120

110

7.5, 6.0

24

130

120

10

25

130

120

10

26

50

40

20

26H

58

40

20

27

35

20

24

28

90

70

15

28D

90

70

12

29

120

110

10

29D

120

110

7.5, 6.0

30

50

40

20

31

65

55

18

32

100

85

10

33

50

40

20

34

65

55

18

35

130

120

5

36

65

60 to 95

10

37

50

31

20

38

130

115

10

*All values are minimums per ASTM B348

D Properties for material in transformed-beta condition.

E Properties for solution treated condition.

F Properties for solution treated and aged condition–Moderate strength (determined by aging temperature).

G Properties for solution treated and aged condition–High strength (determined by aging temperature).

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