Hardness and tensile strength table

Hardness tables determine the resistance of a material to be penetrated. To do this, two measurement methods are mainly used: Brinell hardness and Rockwell hardness.

Hardness and tensile strength table

Hardness and tensile strength table Brinell and Rockwell
Brinell hardness 3000 Kg. load
Steel ball Ø 10 mm.
Tensile strength Kg/mm²Rockwell hardness
Indentation diameter mm.Hardness HB 30Scale C 150 Kg. load diamond cone
Hardness and tensile strength table Brinell and Rockwell
Brinell hardness 3000 Kg. load
Steel ball Ø 10 mm.
Tensile strength Kg/mm²Rockwell hardness
Indentation diameter mm.Hardness HB 30Scale C 150 Kg. load diamond cone

(2,30)

(712)

67

(2,32)

(697)

66

(2,35)

(682)

65

(2,37)

(668)

64

(2,40)

(653)

(235)

63

(2,43)

(639)

(230)

62

(2,45)

(624)

(225)

61

(2,48)

(610)

(220)

60

(2,51)

(595)

(215)

59

(2,54)

(581)

(209)

58

(2,57)

(568)

(204)

57

(2,60)

(555)

(199)

56

(2,63)

(542)

(194)

55

(2,66)

(529)

(189)

54

(2,69)

(517)

(184)

53

(2,72)

(506)

(180)

52

(2,75)

(495)

(175)

51

(2,78)

(484)

(171)

50

(2,81)

473

166

49

2,85

462

162

48

2,88

451

158

47

2,91

440

154

46

2,95

429

149

45

3,00

415

144

43

3,05

401

139

41

3,10

388

134

40

3,15

376

129

39

3,20

363

125

37

3,25

353

121

36

3,30

341

117

35

3,35

331

114

34

3,40

321

110

33

3,45

311

107

31

3,50

302

104

30

3,55

294

101

29

3,60

285

98

28

3,65

277

95

27

3,70

269

92

26

3,75

262

89

25

3,80

255

87

24

3,85

248

85

23

3,90

241

83

21

3,95

235

81

20

4,00

229

79

19

4,05

223

77

18

4,10

217

75

(17)

4,15

212

73

(16)

4,20

207

71

(15)

4,25

201

69

(14)

4,30

197

68

(13)

4,35

192

66

(12)

4,40

187

64

4,45

183

62

4,50

179

61

4,55

174

60

4,60

170

58

4,65

167

57

4,70

163

56

4,75

159

54

4,80

156

53

4,85

152

52

4,90

149

51

4,95

146

50

5,00

143

50

5,05

140

49

5,10

137

48

5,15

134

47

5,20

131

46

5,25

128

45

5,30

126

44

5,35

123

43

5,40

121

42

5,45

118

42

5,50

116

41

5,55

114

40

5,60

111

39

Brinell hardness

The Brinell hardness determines the hardness of a material through the indentation method that allows measuring the penetration of an object in the material to be studied.

In the test, the indenter is a 10 to 12 mm. diameter steel ball which stands on the material test-piece, applying a 3000 kiloponds force during a given time, causing the appearance of an indentation of certain diameter on the material.

Rockwell hardness

The Rockwell test determines the hardness of the material to be penetrated. It consists on the penetration of a ball (soft material) or diamond cone (hard material) through a load which is performed in two successive steps.

The hardness value corresponds to the difference between the penetration depths of both:

E= H – HO (H being the base load and H0 the preliminary load.)