phone-icon800.354.0806
765.456.6012
The Home of HASTELLOY® and
HAYNES® Alloys

High-temperature Hardness

The following are results from standard vacuum furnace hot hardness tests. Values are given in originally measured DPH (Vickers) units and conversions to Rockwell C/B scale in parentheses.
Vickers Diamond Pyramid Hardness (Rockwell C/B Hardness)
70°F (20°C) 800°F (425°C) 1000°F (540°C) 1200°F (650°C) 1400°F (760°C)
Solution Treated 251 22 HRC 171 87 HRB 160 83 HRB 150 80 HRB 134 74 HRB
15% Cold-Work 348 35 HRC 254 23 HRC 234 97 HRB 218 95 HRB - -
20% Cold-Work 401 41 HRC 318 32 HRC 284 27 HRC 268 25 HRC - -
25% Cold-Work 482 48 HRC 318 32 HRC 200 30 HRC 286 28 HRC - -

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

Print Page
Back to top