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The Home of HASTELLOY® and
HAYNES® Alloys

High-Temperature Hardness

188hardness

Temperature 188 25 6B 230® 556®
Vickers Hardness Rockwell Hardness Vickers Hardness Rockwell Hardness Vickers Hardness Rockwell Hardness Vickers Hardness Rockwell Hardness Vickers Hardness Rockwell Hardness
°F °C DPN HR C/B DPN HR C/B DPN HR C/B DPN HR C/B DPN HR C/B
72 RT 248 21.8 C 285 27.8 C 374 38.2 C 195 92.0 B 203 93.6 B
800 427 170 86.3 B 171 86.7 B 269 25.5 C 142 77.3 B 132 73.0 B
1000 538 159 83.0 B 160 73.3 B 247 21.8 C 139 76.0 B 129 71.1 B
1200 649 147 77.2 B 150 80.0 B 225 97.5 B 132 73.0 B 118 66.5 B
1400 760 129 70.7 B 134 73.7 B 153 81.0 B 125 70.0 B 100 55.0 B
1600 871 89 - 93 - 91 - 75 - 67 -
1800 982 49 - 52 - 55 - 42 - 41* -

HRB = Hardness Rockwell “B”
HRC = Hardness Rockwell “C”

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