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R-91 — Hrb
- Scale
- Hrb
- Hardness Value
- 91
- Approximate Tensile Ksi (ksi)
- 93
- Approximate Tensile Mpa (MPa)
- 641
- Hb (dimensionless)
- 190
- Hrb (dimensionless)
- 91
- HV (dimensionless)
- 190
- Material Class
- Steel