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The Rockwell C Hardness for a grade 10.9 fastener is 32 - 39HRC or 320 - 380Hv10

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What is Rockwell C?

Answer Rockwell C is a method to measure the hardness of a metal object. The hardness of the metal is a direct correlation to its strength properties: i.e., Tensile Strength. The scales can be found in any engineering or matierals reference books. A test devise is used to strick a metal object with a small pointed hammer. The size of the dimple is compared to a chart to give you the Rockwell C hardness value. There are 3 charts for measuring hardness: A scale, B scale and Cscale. Rockwell C is for the hardest of metals such as very high strength steel. Rockwell A is for much softer materials including something as soft as clay, I believe. During manufacture, a hardness test will be performed to ensure that the finished product meets the design engineer's criteria to ensure the part.


What is the Hardness Rockwell C scale?

This is a method used to determine the hardness of a metal. If you know the type of metal and the hardness, this will tell you the Tensile Strength of the metal and how well it was heat treated. The method uses a ball or a pin to strick the metal and leave a small indention. The size and depth that the ball makes in the metal is inversely proportional to the hardness. Using the scale, you can then determine if the part has completed the proper heat treatment as required by the Engineering drawing. There are 3 Rockwell scales: A, B, C. Rockwell C scale is for the hardest of metals such as steel. Rockwell B is for metal such as soft aluminum and A is for even softer metals.


What is the hardness of 68 HRC mean?

The Rockwell C Hardness system uses "HRC" as a measure of hardness for various materials. A hardness of 68 HRC is extremely high and will most likely be harder than simple steel.


What is the Rockwell hardness of s-7 tool steel?

S7 tool steel is produced and supplied to the machinist or tool maker in the annealed or soft condition. S-7 is typically heat treated and used in the Rockwell C hardness range of RC 54-59. Form more specific information about S-7 tool steel and heat treating, see the related links below.


What is hardness for C45?

I need to know the hardness for c - 45 steel.

Related Questions

What is the RC hardness of inconel?

Inconel typically has a Rockwell C (RC) hardness of around 20-35, depending on the specific grade and heat treatment.


What should be Rockwell C hardness of concrete nail?

5.5


How do you convert shore scale c to Rockwell scale c?

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.


What is Rockwell C?

Answer Rockwell C is a method to measure the hardness of a metal object. The hardness of the metal is a direct correlation to its strength properties: i.e., Tensile Strength. The scales can be found in any engineering or matierals reference books. A test devise is used to strick a metal object with a small pointed hammer. The size of the dimple is compared to a chart to give you the Rockwell C hardness value. There are 3 charts for measuring hardness: A scale, B scale and Cscale. Rockwell C is for the hardest of metals such as very high strength steel. Rockwell A is for much softer materials including something as soft as clay, I believe. During manufacture, a hardness test will be performed to ensure that the finished product meets the design engineer's criteria to ensure the part.


When reading the steel heat treatment notation RC what does the R mean?

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.


What is the Hardness Rockwell C scale?

This is a method used to determine the hardness of a metal. If you know the type of metal and the hardness, this will tell you the Tensile Strength of the metal and how well it was heat treated. The method uses a ball or a pin to strick the metal and leave a small indention. The size and depth that the ball makes in the metal is inversely proportional to the hardness. Using the scale, you can then determine if the part has completed the proper heat treatment as required by the Engineering drawing. There are 3 Rockwell scales: A, B, C. Rockwell C scale is for the hardest of metals such as steel. Rockwell B is for metal such as soft aluminum and A is for even softer metals.


What is HRC in rockwell testing machine?

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.


What is the hardness of 68 HRC mean?

The Rockwell C Hardness system uses "HRC" as a measure of hardness for various materials. A hardness of 68 HRC is extremely high and will most likely be harder than simple steel.


What is the hardness of 4140 Plate?

The hardness of 4140 plate typically ranges from 28 to 32 HRC (Rockwell C scale) when heat treated to achieve desired mechanical properties.


What is the full form of hrc in term of hardness?

The full form of HRC is Rockwell Hardness C Scale. It is a measure of the hardness of a material, typically metals, determined by how much force is required to create an indentation on the surface of the material.


How do you I calculate the Rockwell Hardness number?

Converting between different hardness scales is not an exact science, but there are many charts available that will show the approximate relationship between different scales. One chart is available at http://www.carbidedepot.com/formulas-hardness.htm Another useful website for converting between different hardness scales is http://www.efunda.com/units/hardness/convert_hardness.cfm Tianxing Testing Instruments Co. Ltd. is a professional manufacturer of portable hardness testers http://www.hardnesstesters.biz/


How hard is a file on the Rockwell scale?

The Rockwell scale measures the hardness of materials, particularly metals, using a standardized method that involves applying a specific load to an indenter and measuring the depth of penetration. Different Rockwell scales (e.g., A, B, C) are used for various materials, with the C scale commonly applied to harder materials like steel. The scale provides a straightforward numerical value that indicates hardness, where higher numbers correspond to harder materials. Thus, the hardness of a file, which is typically made from high-carbon steel, would be relatively high on the Rockwell scale, often around 60 HRC or more.