Shear Modulus (G) for Nitronic 50 or XM-19 Hot Rolled Condition

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Discussion Overview

The discussion centers on the shear modulus (G) for Nitronic 50 or XM-19 in a high strength hot rolled condition, specifically referencing UNS - S20910 and ASTM A276-10. Participants express surprise at the lack of shear modulus data in material standards and seek alternative sources for this information.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant inquires about the shear modulus for Nitronic 50 or XM-19 and notes the absence of this data in material standards like ASME or ASTM.
  • Another participant provides the formula for calculating shear modulus from Young's modulus (E) and Poisson's ratio (ν), stating that $$G = \frac{E}{1 + 2 \nu}$$.
  • A subsequent reply challenges the accuracy of the initial formula, suggesting it should be $$G = \frac{E}{2(1+\nu)}$$ instead.
  • Participants acknowledge the correction regarding the formula and reflect on their past experiences with it.

Areas of Agreement / Disagreement

There is no consensus on the availability of shear modulus data in standards, and participants have differing views on the correct formula for calculating shear modulus from Young's modulus and Poisson's ratio.

Contextual Notes

The discussion includes potential confusion regarding the correct formula for shear modulus and the reliance on specific values for Young's modulus and Poisson's ratio, which may not be universally agreed upon.

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I am looking for shear modulus (G) for Nitronic 50 or XM-19 High strength hot rolled condition

UNS - S20910 and ASTM A276-10

it is surprising for me that material standards like ASME or ASTM does not provide shear modulus data..?

even checked "http://www.keytometals.com" and "http://www.matweb.com"

but didnt found...

is there alterative source to find shear modulus data...

regards
 
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For isotropic materials, $$G = \frac{E}{1 + 2 \nu}$$

A Google search soon found values for Youngs modulus ##E## and Poisson's ratio ##\nu##
 
AlephZero said:
For isotropic materials, $$G = \frac{E}{1 + 2 \nu}$$

A Google search soon found values for Youngs modulus ##E## and Poisson's ratio ##\nu##

You are correct that the shear modulus can be calculated from Young's modulus and the Poisson ratio, but the formula you gave is incorrect.

G = E/(1+\nu)/2
 
Chestermiller said:
You are correct that the shear modulus can be calculated from Young's modulus and the Poisson ratio, but the formula you gave is incorrect.

Oops. You are right. Of course if should be $$\frac{E}{2(1+\nu)}$$

"E/G = 2.6" is burned into my brain, but that doesn't mean I never make typos!
 
thank you guys... now i remember; this formula i used in my graduation... :)