{"id":4096,"date":"2025-07-08T15:05:55","date_gmt":"2025-07-08T15:05:55","guid":{"rendered":""},"modified":"2025-07-08T16:41:35","modified_gmt":"2025-07-08T16:41:35","slug":"tensile-strength-vs-yield-strength","status":"publish","type":"post","link":"https:\/\/wp.unionfab.com\/es\/tensile-strength-vs-yield-strength\/","title":{"rendered":"Tensile Strength vs. Yield Strength [+Key Differences Explained]"},"content":{"rendered":"
Understand the key differences between tensile and yield strength in 3D printing\u2014design stronger, safer parts with the right mechanical insights.<\/p>\n
Introduction<\/h2>\n
In 3D printing, choosing the right material goes beyond color or surface finish\u2014it requires a deep understanding of how a material behaves under load.<\/p>\n
Two key mechanical properties that often come up in design and engineering decisions are tensile strength and yield strength. Though they\u2019re closely related, these properties determine how your 3D printed part performs under stress, how much it can bend before it breaks, and whether it will deform permanently during use.<\/p>\n
This guide explains what tensile and yield strength are, how they differ, and why both are essential when designing and selecting materials for 3D printed parts.<\/p>\n
What is Tensile Strength<\/h2>\n
Tensile strength, also named ultimate tensile strength(UTS), refers to the maximum stress a 3D printed material can endure when stretched before it ultimately breaks. It\u2019s the material\u2019s breaking point under a pulling force.<\/p>\n
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Unit: <\/strong>MPa (megapascals) or psi<\/p>\n<\/li>\n
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Testing: <\/strong>Measured via tensile testing using ASTM D638 or ISO 527 standard dog-bone samples<\/p>\n<\/li>\n
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Where it matters: <\/strong>Parts under continuous tension or subject to pulling forces\u2014like load hooks, cable ties, snap-fits, and living hinges<\/p>\n<\/li>\n<\/ul>\n
Example: An FDM-printed part using carbon-fiber-reinforced nylon may have a tensile strength of 70\u2013100 MPa, meaning it can handle significant tension before failing.<\/p>\n
What is Yield Strength<\/h2>\n
Yield strength is the stress level at which a 3D printed material starts to undergo permanent deformation\u2014even if the load is removed. Below this point, deformation is elastic and reversible.<\/p>\n
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Unit: <\/strong>MPa or psi<\/p>\n<\/li>\n
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Significance: <\/strong>Defines the material\u2019s functional limit\u2014beyond this, the part will bend, warp, or sag and not return to its original shape<\/p>\n<\/li>\n
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Where it matters: <\/strong>Load-bearing structural parts, enclosures, brackets, and mechanical joints<\/p>\n<\/li>\n<\/ul>\n
Example: A PLA part may have a yield strength of 50 MPa. Any functional load above this will cause bending or warping that doesn\u2019t recover.<\/p>\n
Yield Strength vs Tensile Strength: Key Differences<\/h2>\n
In 3D printing, both yield strength and tensile strength describe how a material behaves under pulling forces\u2014but they represent different stages of mechanical stress.<\/p>\n
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