303 does work-harden, like other austenitic grades. Although the
sulphur content makes it relatively free-machining, it will still
harden up like a s.o.b. if your tools are not sharp.
I guess you know not to try to weld it.
On 4/14/2018 4:41 PM, Ed Huntress wrote:
>> 303 Stainless Doesn't Work Harden!!! ... or does it???
>> LOL. I give up.
> 303 does work-harden, like other austenitic grades. Although the
> sulphur content makes it relatively free-machining, it will still
> harden up like a s.o.b. if your tools are not sharp.
> I guess you know not to try to weld it.
Yeah. Maybe outside of my skill set, but when I sought MFG sources to
back up my claims that it does work harden I discovered that it is
reported to be weldable, but difficult.
This is from the Penn Stainless website:
* Not generally recommended, but may be welded with some difficulty
* May be welded with Alloy 310 electrodes
* Should be annealed after welding to re-dissolve precipitated carbides
I won't be trying it any time soon.
DANG-IT! I've been using Thunderbird for a couple months now and I
still keep hitting the reply button in Usenet groups instead of the
follow up button.
These guys manufacture and sell 303 stainless. Under the processing tab
it says, "Will work harden, therefore, it should be machined at reduced
surface feet per minute and heavier feeds to prevent glazing at the tool
I found a half dozen more sources that agree. All say its the "most"
machinable stainless, but they also say it can work harden. Reputable
sources like that one.
Saying arbitrarily it doesn't work harden when it is documented that it
can may lead somebody into trouble. I don't doubt the Other Poster has
had little trouble machining 303. I don't recall having any trouble with
303 either, but I also take the time to research the materials I work
with and not just do operations by rote. If you do it the way it worked
before it will usually work again, but what happens when it doesn't?
FYI: The same sources (and others) do not say it is not weldable. They
say it can be tricky or difficult to weld. Some even offer some
suggestions or guidelines for weld processing.
Apparently that wasn't good enough. I got a PM calling me a non
contributing blowhard, that I wasn't going to get banned, but... and
then I got banned anyway. LOL.
I guess being right just isn't good enough. LOL.
Its Nelson's forum and he can run it anyway he wants I guess.
Usenet is dead. Long live Usenet. LOL.
Let's face it: the Usenet, and lots of Web forums, have degenerated
into cesspools of misinformation. It's reached the point where no one
even knows what a credible source is anymore.
FWIW, I still pull a lot of stuff from memory, but I *try hard* to
check my memory against reputable sources before answering some
technical or legal question. And I usually can. I confirmed what I
remembered about 303 with some good sources before responding to you.
I'm surprised sometimes at how much of that technical stuff has stuck
with me, especially about obscure things like materials. It's been
decades since I was materials editor at _American Machinist_, although
I was still drawing on it while I was writing for manufacturing
magazines, until I retired in 2016.
Also, since I turned 70 today, I'm expecting it to start going away
soon. So far, I don't detect any substantial differences. But it must
Keep that in mind if I respond to technical questions in the future.
Hey, thanks, Terry! My first Happy Birthday today came from Allstate
Insutance Co. Then came one from Experion. Then came my wife. <g>
My birthday is easy to remember, too. It's the day the Titanic sank.
And it's Income Tax Day.
It doesn't do much for the mood of the well-wishers, but they don't
often forget it. d8-)
Well, see, that's why older people don't remember. Young people
remember, as in, "Oh shit, it's income tax day. And that means it's
Ed's birthday. Shit." d8-)
The best thing about it is that I never have to buy a fishing license
again! Not even a trout stamp!
I didn't think there were any wild trout in Arkansas, but there are
some as far south as Georgia, in the mountains (or there were, 20
years ago), so I guess it's possible. The water has to be pretty cold
year around for them to survive the summers.
Apparently some of the rivers downstream of the dams too , they pull the
cold water from the bottom for the power generation turbines . There's a
huge fish hatchery just downstream from I think it's Norfork Dam . They
have the whole thing covered with netting , otherwise the hawks and
eagles would be fat and they'd have no fish .
Reduced fees for senior citizens here in Oregon start at age _70_.
There are no freebies for fishermen or hunters in this Leftist-owned
state...yet. All we need are a few more thousand retired (or working)
conservative Californians (most of the people I meet up here are
We must have courage in the face of sometimes, near insuperable
odds, against the dark forces of statism, political correctness,
Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here.
All logos and trade names are the property of their respective owners.