# Welding alum head

**URL:** https://forums.speedlife.net/t/welding-alum-head/127688
**Category:** SON240sx Automotive
**Created:** [September 1, 2009, 4:58pm UTC](https://forums.speedlife.net/t/welding-alum-head/127688 "2009-09-01T16:58:46Z")
**Posts on this page:** 1
**Showing post:** 20

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### Author: ![BAS](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bas/32/5540_2.png) [@BAS](https://forums.speedlife.net/u/BAS)
#### Post date: [September 14, 2009, 12:58am UTC](https://forums.speedlife.net/t/welding-alum-head/127688/20 "2009-09-14T00:58:18Z")

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Welded aluminum changes state, the heat area looses it’s hardness, in this case a ‘T’ rating, it Will season back to a ‘H’ or half hard but it will be weaker then the rest of the head, normalizing then re heat treating will bring it back an equal ‘T’ harness.

> [@OPPPSSSSS I F\*cked up :-P](https://forums.speedlife.net/t/opppsssss-i-f-cked-up-p/23850/17):
>
> Are you sure this applies to aluminum, and not just to steels?  
> There would be no carbon (hardness) to play with…

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