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Mohs Hardnesses of the elements PDF Print E-mail

 

Mohs Hardness

Number

Symbol

Name

Mohs Hardness

3

Li

lithium

0.6

4

Be

beryllium

5.5

5

B

boron

9.3

6

C

carbon

(graphite) 0.5

6

C

carbon

(diamond) 10.0

11

Na

sodium

0.5

12

Mg

magnesium

2.5

13

Al

aluminium

2.75

14

Si

silicon

6.5

16

S

sulfur

2.0

19

K

potassium

0.4

20

Ca

calcium

1.75

22

Ti

titanium

6.0

23

V

vanadium

7.0

24

Cr

chromium

8.5

25

Mn

manganese

6.0

26

Fe

iron

4.0

27

Co

cobalt

5.0

28

Ni

nickel

4.0

29

Cu

copper

3.0

30

Zn

zinc

2.5

31

Ga

gallium

1.5

32

Ge

germanium

6.0

33

As

arsenic

3.5

34

Se

selenium

2.0

37

Rb

rubidium

0.3

38

Sr

strontium

1.5

40

Zr

zirconium

5.0

41

Nb

niobium

6.0

42

Mo

molybdenum

5.5

44

Ru

ruthenium

6.5

45

Rh

rhodium

6.0

46

Pd

palladium

4.75

47

Ag

silver

2.5

48

Cd

cadmium

2.0

49

In

indium

1.2

50

Sn

tin

1.5

51

Sb

antimony

3.0

52

Te

tellurium

2.25

55

Cs

caesium

0.2

56

Ba

barium

1.25

57

La

lanthanum

2.5

58

Ce

cerium

2.5

72

Hf

hafnium

5.5

73

Ta

tantalum

6.5

74

W

tungsten

7.5

75

Re

rhenium

7.0

76

Os

osmium

7.0

77

Ir

iridium

6.5

78

Pt

platinum

3.5

79

Au

gold

2.5

80

Hg

mercury

1.5

81

Tl

thallium

1.2

82

Pb

lead

1.5

83

Bi

bismuth

2.25

90

Th

thorium

3.0

92

U

uranium

6.0

Vickers hardness

number

symbol

name

Vickers hardness/(MN/m²)

4

Be

beryllium

1670

5

B

boron

49000

13

Al

aluminium

167

22

Ti

titanium

970

23

V

vanadium

628

24

Cr

chromium

1060

26

Fe

iron

608

27

Co

cobalt

1043

28

Ni

nickel

638

29

Cu

copper

369

40

Zr

zirconium

903

41

Nb

niobium

1320

42

Mo

molybdenum

1530

45

Rh

rhodium

1246

46

Pd

palladium

461

47

Ag

silver

251

57

La

lanthanum

491

58

Ce

cerium

270

59

Pr

praseodymium

400

60

Nd

neodymium

343

62

Sm

samarium

412

63

Eu

europium

167

64

Gd

gadolinium

570

65

Tb

terbium

863

66

Dy

dysprosium

540

67

Ho

holmium

481

68

Er

erbium

589

69

Tm

thulium

520

70

Yb

ytterbium

206

71

Lu

lutetium

1160

72

Hf

hafnium

1760

73

Ta

tantalum

873

74

W

tungsten

3430

75

Re

rhenium

2450

77

Ir

iridium

1760

78

Pt

platinum

549

79

Au

gold

216

90

Th

thorium

350

92

U

uranium

1960

Brinell hardness

number

symbol

name

Brinell hardness/(MN/m²)

4

Be

beryllium

600

11

Na

sodium

0.69

12

Mg

magnesium

260

13

Al

aluminium

245

19

K

potassium

0.363

20

Ca

calcium

167

21

Sc

scandium

750

22

Ti

titanium

716

23

V

vanadium

628

24

Cr

chromium

1120

25

Mn

manganese

196

26

Fe

iron

490

27

Co

cobalt

700

28

Ni

nickel

700

29

Cu

copper

874

30

Zn

zinc

412

31

Ga

gallium

60

33

As

arsenic

1440

34

Se

selenium

736

37

Rb

rubidium

0.216

39

Y

yttrium

589

40

Zr

zirconium

650

41

Nb

niobium

736

42

Mo

molybdenum

1500

44

Ru

ruthenium

2160

45

Rh

rhodium

1100

46

Pd

palladium

37.3

47

Ag

silver

24.5

48

Cd

cadmium

203

49

In

indium

8.83

50

Sn

tin

51

51

Sb

antimony

294

52

Te

tellurium

180

55

Cs

caesium

0.14

57

La

lanthanum

363

58

Ce

cerium

412

59

Pr

praseodymium

481

60

Nd

neodymium

265

62

Sm

samarium

441

65

Tb

terbium

677

66

Dy

dysprosium

500

67

Ho

holmium

746

68

Er

erbium

814

69

Tm

thulium

471

70

Yb

ytterbium

343

71

Lu

lutetium

893

72

Hf

hafnium

1700

73

Ta

tantalum

800

74

W

tungsten

2570

75

Re

rhenium

1320

76

Os

osmium

3920

77

Ir

iridium

1670

78

Pt

platinum

392

79

Au

gold

2450

81

Tl

thallium

26.4

82

Pb

lead

38.3

83

Bi

bismuth

94.2

90

Th

thorium

400

92

U

uranium

2400

References

As quoted at http://www.webelements.com/ from this source:

  • G.V. Samsonov (Ed.) in Handbook of the physicochemical properties of the elements, IFI-Plenum, New York, USA, 1968.

 
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