MPA calculation VS MPA listed on materials

In summary, the conversation discussed the conversion of units from PSI to MPa and the confusion surrounding the resulting values. The original poster used an online calculator to determine the MPa for a tensile strength of 0.51 PSI and found it to be a small number. However, they were unsure of the significance of this number and questioned the accuracy of the conversion. The conversation also mentioned the need for proper units and clarified that MPA refers to Mega Pascal.
  • #1
Ed Kelly
2
0
Hi,

I am not a mathematician or scientist or student. In advance I ask that you please excuse my ignorance. I calculated that at tensile strength of .51 equals an MPA of .0035163. Thank god for internet calculators. I do not know what MPA means, but materials are listed this way. So if I want to choose a material with an MPA of greater than .0035163 and I look at the MPA of materials, the MPA listed seems mammoth in comparison and defies logic. For example, glass is listed as having an MPA of 60. So what am I missing?
 
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  • #3
Sorry - .51 PSI
 
  • #4
Ed Kelly said:
Sorry - .51 PSI

Yeah, but did you get DEvans answer of what MPA means (to be accurate, it should be written as MPa)? You never indicated if by that information, you realize that this is a psi to MPa unit conversion.

Zz.
 
  • #5
Oh. For 0.51 PSI you don't need much of a container. You could probably get that much pressure from a party balloon.
 

FAQ: MPA calculation VS MPA listed on materials

What is the difference between MPA calculation and MPA listed on materials?

MPA calculation refers to the process of determining the maximum pressure a material can withstand before it fails. This is typically done through various laboratory tests and calculations. On the other hand, MPA listed on materials is the maximum pressure value that is provided by manufacturers and is typically based on a standardized testing method.

Why do MPA calculations sometimes differ from MPA listed on materials?

The MPA listed on materials may differ from the calculated value due to various factors such as variations in testing conditions, manufacturing processes, and material properties. It is important to note that the listed MPA value is often a conservative estimate to ensure safety and reliability in real-world applications.

Which value should be considered when designing with a specific material?

Both the MPA calculation and the MPA listed on materials should be taken into consideration when designing with a specific material. It is important to understand the limitations and potential variations of the listed value and to use the calculated value as a baseline for design considerations.

Can the MPA listed on materials be used interchangeably between different materials?

No, the MPA listed on materials is specific to each material and cannot be used interchangeably. Each material has its own unique properties and testing methods, which can greatly impact the maximum pressure it can withstand.

How accurate are MPA calculations and listed values?

The accuracy of MPA calculations and listed values can vary depending on the testing methods and conditions used. However, both values are typically reliable estimates and are regularly used in the design and manufacturing of materials to ensure safety and performance.

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