Approx 37.8 Rockwell "c" scale
Diamond is more than 1000 times harder than quartz, which is in the 80 range in the Rockwell C. Diamond cannot be measured on the Rockwell C scale. A diamond pyramid is actually used in the Rockwell C test, which would be inconclusive.
The Rockwell C Hardness for a grade 10.9 fastener is 32 - 39HRC or 320 - 380Hv10
To convert Shore scale C to Rockwell scale C, there is no direct formula as they measure hardness differently. Shore scale C measures indentation hardness while Rockwell scale C measures depth of penetration. These two scales cannot be directly converted into one another.
5.5
HRC stands for Hardness Rockwell C scale. There are different scales; C is probably the most common for hardened materials. See the related link for more information.
RC stands for Rockwell Hardness C scale; the different letters A,B,C etc. are based on different loads and indenters for measurement. C scale is typical for steels, while B scale is typical for aluminum. There are conversion tables for these if needed.
The melting point for tin is 232°C, 449 °F
The melting point of tin is 231.9 deg C.
The Adventures of Rin Tin Tin - 1954 The New C-O- 4-17 was released on: USA: 14 February 1958
The melting point of tin is 231.9°C and the boiling point is 2602°C in Celsius.
Tin (Sn) - Atomic Number = 50, Melting Point = 232°C, Boiling Point = 2260°C.
Rockwell C scale