The response is that the 304L alloy's lower carbon content helps limit/eliminate carbide precipitation during the welding system. This allows 304L stainless steel to be utilized in the "as-welded" state, even in extreme destructive conditions.
If you somehow happened to utilize standard 304 stainless similarly, it would debase a lot quicker at the weld joints.
Basically, utilizing 304L eliminates the need to anneal weld joints before utilizing the completed metal structure saving time and exertion.
Practically speaking, both 304 and 304L can be utilized for a considerable lot of similar applications. The distinctions are regularly minor enough that one isn't considered massively more useful than the other. At the point when more grounded erosion obstruction is required, other alloys, like grade 316 stainless steel, are usually considered as an alternative.
The Mechanical Difference:
Grade stainless steel 304L plates mechanical properties has a slight, yet noticeable, decrease in key mechanical execution attributes contrasted with the "standard" grade 304 stainless steel alloy.
For example, the ultimate tensile strength (UTS) of 304L is roughly 85 ksi (~586 MPa), less than the UTS of standard grade 304 stainless, which is 90 ksi (~620 MPa). The distinction in yield strength is slightly more prominent, with 304 SS having a 0.2% yield strength of 42 ksi (~289 MPa) and 304L having a 0.2% yield strength of 35 ksi (~241 MPa).
This intends that assuming you had two steel wire crates and the two bushels had precisely the same plan, wire thickness, and development, the bin produced using 304L would be structurally more vulnerable than the standard 304 bin.
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