# Flux core wire

**URL:** <https://community.sparkfun.com/t/flux-core-wire/37221>\
**Category:** Tools\
**Created:** [July 6, 2019, 3:24pm UTC](https://community.sparkfun.com/t/flux-core-wire/37221 "2019-07-06T15:24:48Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Owen123](https://avatars.discourse-cdn.com/v4/letter/o/f08c70/32.png) [@Owen123](https://community.sparkfun.com/u/Owen123)\
**Post date:** [July 6, 2019, 3:24pm UTC](https://community.sparkfun.com/t/flux-core-wire/37221/1 "2019-07-06T15:24:48Z")

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Hi! What is flux core wire?

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**Author:** ![DanV](https://avatars.discourse-cdn.com/v4/letter/d/e9c0ed/32.png) [@DanV](https://community.sparkfun.com/u/DanV)\
**Post date:** [July 8, 2019, 2:23pm UTC](https://community.sparkfun.com/t/flux-core-wire/37221/2 "2019-07-08T14:23:08Z")

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[https://lmgtfy.com/?q=flux+core+wire](https://lmgtfy.com/?q=flux+core+wire)

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**Author:** ![El\_Duderino](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/el_duderino/32/6367_2.png) [@El\_Duderino](https://community.sparkfun.com/u/El_Duderino)\
**Post date:** [July 15, 2019, 9:43pm UTC](https://community.sparkfun.com/t/flux-core-wire/37221/3 "2019-07-15T21:43:23Z")

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Hi Owen,

Flux core wire refers to a solder wire with a rosin/flux core that allows it to flow/melt more evenly. Most commonly, you’ll find this in unleaded solder to help reflow the metal alloy the solder is made of. [[This section](https://learn.sparkfun.com/tutorials/how-to-solder-through-hole-soldering#what-is-solder) of our How to Solder: Through Hole Soldering goes into this and more in greater detail.]([How to Solder: Through-Hole Soldering - SparkFun Learn](https://learn.sparkfun.com/tutorials/how-to-solder-through-hole-soldering#what-is-solder))

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**Author:** ![hunghoang](https://avatars.discourse-cdn.com/v4/letter/h/b4bc9f/32.png) [@hunghoang](https://community.sparkfun.com/u/hunghoang)\
**Post date:** [July 24, 2019, 12:36pm UTC](https://community.sparkfun.com/t/flux-core-wire/37221/4 "2019-07-24T12:36:04Z")

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Flux-cored wire is a semi-automatic arc welding process is widely used in construction because of its high welding speed and portability.