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R-21 — Hrc
- Scale
- Hrc
- Hardness Value
- 21
- Approximate Tensile Ksi (ksi)
- 113
- Approximate Tensile Mpa (MPa)
- 779
- Hb (dimensionless)
- 231
- Hrc (dimensionless)
- 21
- HV (dimensionless)
- 243
- Material Class
- Steel