Material 12L14 Steel

[FrancoisY]

I would like guidance on this material change. The new material (12L14) is the same but without Tellurium. Tellurium improves machinability and lead, but i've discovered it didn't matter for my sake. The material properties are similar, except the “Reduction in Area.” I am not too concern with chemical composition except carbon unless mistaken. It does state that original Carbon is 0.09MAX. Maybe the carbon can play a big role?

Reduction in area - Technically states the higher the % the more ductile it is and performed better; likely the ability to deform without breaking.

Original material ranges from 40% - 50%. The new material has 35% meaning it will be less ductile than the our original material by 5%. Everything else relating physical and chemical properties are the same. Do you all think with this 5% reduction, it would be a HUGE deal? I know if a product is more than 50%, it would be an issue because it would be too ductile.

 

[EdStainless]

It might help you to compare actual properties also.
These aren't different enough to matter.

 

[jessieleo99]

It is likely not critical. A 5% difference in RA is generally a small variation in materials with similar physical and chemical properties particularly if your application does not heavily rely on ductility or involve high deformation.

 

[dtimberlake]

In my current industry with pressure vessels, high temperatures, long service lives, and an occasional "puff" ( explosion ) 10% elongation is the bare minimum.

Back when I was riding my fabrications like a pony through the woods I would not consider anything less than 20% elongation.

" I know if a product is more than 50%, it would be an issue because it would be too ductile."
Are you making shear pins ?

I'd think, since nearly all Steel's E/moduli of elasticity are pretty close, if the yield strength and UTS are adequate, you'll never experience or get to observe the reduction in area.