Help Needed From Stainless Steel Gurus

[wintermute]

Can you use 304 or 309 filler wire on 15-5 PH stainless steel?
All of the material literature I've seen calls out ER630 as the appropriate filler, which I'm not finding in a MIG spool at anything less than an industrial quantity.

I have a stack of material to use and no wire to run on it with my little Hobart Handler 135

I'm looking to build some truck parts; headache rack, spare tire carrier, skid plates etc. Ultimately, I'm hoping for strong enough and looking to avoid electrolytic corrosion.

Any thoughts?

 

[Bobcat753]

heres a little info I found
15-5 is a variant of the older 17-4 chromium-nickel-copper precipitation hardening stainless steel. Both alloys exhibit high strength and moderate corrosion resistance. High strength is maintained to approximately 600 degrees F. The 15-5 alloy was designed to have greater toughness than 17-4. This improved toughness is achieved by reduced delta ferrite content and control of inclusion size and shape.

Also page 20 of this book will help:
http://www.lincolnelectric.com/asse...ghAlloy-UltraCore-UltraCoreFCP316L/c64000.pdf

 

[zkling]

In short you should be fine with 308 or 309. For best results you will want to run tri mix.

 

[Mario428]

Can you use 304 or 309 filler wire on 15-5 PH stainless steel?
All of the material literature I've seen calls out ER630 as the appropriate filler, which I'm not finding in a MIG spool at anything less than an industrial quantity.

I have a stack of material to use and no wire to run on it with my little Hobart Handler 135

I'm looking to build some truck parts; headache rack, spare tire carrier, skid plates etc. Ultimately, I'm hoping for strong enough and looking to avoid electrolytic corrosion.

Any thoughts?

Yes 15-5 PH is a 400 series stainless and will rust unless it is passivated after machining or welding

 

[hunterwheeler]

Yes 15-5 PH is a 400 series stainless and will rust unless it is passivated after machining or welding

will you please describe this in detail that how should we passivate that????

 

[Mario428]

will you please describe this in detail that how should we passivate that????

in the manufacturing world the parts are dipped into a tank of acid, the acid strips the iron from the surface but leaves the nickel and chromium so the part does not rust.

For smaller jobs you would go to a welding supplier and buy pickling paste, http://www.picklingandpassivation.com/k-2-pickling-paste2.html
This is normally used only on welds to eliminate the possibility of them rusting.

You can try it and see how your parts last, at worst if they start to rust you treat it like mild steel, sandblast and paint.

 

[rlitman]

You can passivate with citric acid. Grind up some tablets and make your own paste that's not nearly as toxic as picking paste.

 

[hunterwheeler]

Good info to know about thumbs up dudes.