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Hardness Conversion Table

Rockwell  Hardness

Rockwell Special hardness

Vickers Hardness

Brinel Hardness

Shore Hardness

Tensile Strength

HrC
150KG

HrA
60KG

HrD
100KG

HrB
100KG

15-N
15KG

30-N
30KG

45-N
45KG

Hv
50KG

HB
3000KG

HS

KG/㎟

68.0

85.6

76.9

 

93.2

84.4

75.4

940.0

-

97.0

-

67.5

85.3

76.5

 

93.0

84.0

74.3

920.0

-

96.0

-

67.0

85.0

76.1

 

92.9

83.6

74.2

900.0

-

95.0

-

66.4

84.7

75.7

 

92.7

83.1

73.6

880.0

-

93.0

-

65.3

84.4

75.3

 

92.5

82.7

73.1

860.0

-

92.0

-

65.0

84.1

74.8

 

92.3

82.2

72.2

840.0

-

91.0

-

64.7

83.8

74.3

 

92.1

81.7

71.8

820.0

-

90.0

-

64.0

83.4

73.8

 

91.8

81.1

71.0

800.0

-

88.0

-

63.3

83.0

73.3

 

91.5

80.4

70.2

780.0

-

87.0

 

62.5

82.6

72.6

 

91.2

79.7

69.4

760.0

-

86.0

 

61.8

82.2

72.1

 

91.0

79.1

68.6

740.0

-

84.0

 

61.0

81.8

71.5

 

90.7

78.4

67.7

720.0

-

83.0

 

60.1

81.3

70.8

 

90.3

77.6

66.7

700.0

-

81.0

 

59.7

81.1

70.5

 

90.1

77.2

66.2

690.0

-

-

 

59.7

80.8

70.1

 

89.8

76.8

65.7

680.0

-

80.0

232.0

58.8

80.6

69.8

 

89.7

76.4

65.3

670.0

-

-

228.0

58.3

80.3

69.4

 

89.5

75.9

64.7

660.0

-

70.0

224.0

57.8

80.0

69.0

 

89.2

75.5

64.1

650.0

-

-

221.0

57.3

79.8

68.7

 

89.0

75.1

63.5

640.0

-

77.0

217.0

56.8

79.5

68.3

 

88.8

74.6

63.0

630.0

-

-

214.0

56.3

79.2

67.9

 

88.5

74.2

62.4

620.0

-

75.0

210.0

55.7

78.9

67.5

 

88.2

73.6

61.7

610.0

-

-

207.0

55.2

78.6

67.0

 

88.0

73.2

61.2

600.0

-

74.0

203.0

54.7

78.4

66.7

 

87.8

72.7

60.5

590.0

-

-

200.0

54.1

78.0

66.2

 

87.5

72.1

59.9

580.0

-

72.0

196.0

53.6

77.8

65.8

 

87.2

71.7

59.3

570.0

-

-

193.0

53.0

77.4

65.4

 

86.9

71.2

58.6

560.0

-

71.0

189.0

52.3

77.0

64.8

 

86.6

70.5

57.8

550.0

505.0

-

186.0

51.7

76.7

64.4

 

86.3

70.0

57.0

540.0

496.0

69.0

183.0

51.1

76.4

63.9

 

86.0

69.5

56.2

530.0

488.0

-

179.0

50.5

76.1

63.5

 

85.7

69.0

55.6

520.0

480.0

67.0

176.0

49.8

75.7

62.9

 

85.4

68.3

54.7

510.0

473.0

-

173.0

49.1

75.3

62.2

 

85.0

67.7

53.9

500.0

465.0

66.0

169.0

48.4

74.9

61.6

 

84.7

67.1

53.1

490.0

456.0

-

165.0

47.7

74.5

61.3

 

84.3

66.4

52.2

480.0

448.0

64.0

162.0

46.9

74.1

60.7

 

83.9

65.7

51.3

470.0

441.0

-

158.0

46.1

73.6

60.1

 

83.6

64.9

50.4

460.0

433.0

62.0

155.0

45.3

73.3

59.4

 

83.2

64.3

49.4

450.0

425.0

-

151.0

44.5

72.8

58.8

 

82.8

63.5

48.4

440.0

415.0

59.0

148.0

43.6

72.3

58.2

 

82.3

62.7

47.4

430.0

405.0

-

144.0

42.7

71.8

57.5

 

81.8

61.9

46.4

420.0

397.0

57.0

141.0




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