Stainless Steel - Approximate Hardness Conversions for Austenitic Stainless Steels

Brinell (HB)

Vickers (HV)

Rockwell C (HR C)

Rockwell B (HR B)

479

513

50

-

450

481

48

-

425

452

46

-

403

427

44

-

382

404

42

-

363

382

40

-

346

362

38

-

330

344

36

-

315

326

34

-

301

309

32

106

286

285

28

104

271

266

26

102

256

248

23

100

240

234

20

98

226

220

17

96

213

209

14

94

202

198

12

92

192

188

-

90

183

179

-

88

174

171

-

86

167

164

-

84

160

157

-

82

153

151

-

80

147

144

-

78

142

140

-

76

137

137

-

74

132

133

-

72

128

129

-

70

 
Conversions between hardness values are approximate, and they cannot be used to determine conformance with specifications. Actual hardness values will depend on the type of product. Cold worked products may have high hardness values close to the surface. Conversions between hardness and tensile strength are not standardized and are not reliable.

 

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