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Tips, Techniques, and Questions -- Technical questions or tips |
2018-12-22, 9:29am
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Junior Member
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Join Date: Dec 22, 2018
Posts: 2
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304 Stainless bottle stopper?
I'm new to making bottle stoppers and saw where nilesbottlestoppers.com was recommended by a few of you. I found another site that was cheaper and ordered stoppers from them: stainlessbottlestoppers.com My neighbor is a machinist and said I did not get food grade stainless as advertised. He put a magnet on the stoppers and said it would not stick to 304 grade stainless steel.
My question is; does it really matter what grade they really are? I like their prices but don't want returns from my customers.
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2018-12-22, 6:26pm
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Senior Member
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Join Date: Feb 02, 2010
Posts: 3,382
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304 is perfectly safe for food and is non magnetic. 430 is not generally used for food and is magnetic. Not very resistant to rust either.
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ESC
Soft glass on a Minor/concentrator since 1996
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2018-12-23, 9:51am
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Member
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Join Date: Apr 28, 2012
Location: Alaska
Posts: 64
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If it's not 304 it's more susceptible to corrosion due to acids in the wine
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2018-12-24, 8:05am
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Junior Member
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Join Date: Dec 22, 2018
Posts: 2
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Thank you, and so if the magnet sticks, does that mean it will rust in wine and maybe I should return the stoppers and ask for a refund before I even use them? How can a company advertise a specific material if it's not? never mind, I think I know the answer to that!!
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2018-12-24, 2:20pm
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Senior Member
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Join Date: May 27, 2008
Location: Albion NY
Posts: 517
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ask them what alloy is used.
304 can get magnetic in some situations, usually less so than 4** series steel.
you may have noticed this with butter knives in restaurants.
430 series steel is usually more expensive and used in some brewing equipment like the pipe flanges.
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2019-01-06, 7:33pm
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Member
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Join Date: Apr 28, 2012
Location: Alaska
Posts: 64
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Stainless
308 is mostly used in good brewing and tap systems
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2019-01-06, 7:34pm
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Member
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Join Date: Apr 28, 2012
Location: Alaska
Posts: 64
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308 is used in most GOOD brewing and tap systems
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