Magnetic Material Food Zone

[badgerdave]

I work at a company that makes commercial griddles and deep fat fryers. Purchasing has requested that I investigate changing the material for the control panel from 304 SS to 430 SS. It seems that from a corrosion perspective that this should be feasible.

However, I seem to recall someone telling me that 430 couldn't be used in a "food zone" because it is magnetic. I checked with NSF/ANSI 51 Food Equipment materials and theres noting mentioned about materials that were not allowed due to being magnetic.

I just want to double check to see if there was a reason that I remembered the "no magnetic in food zone" rule or if anybody else had heard that as well

Thanks.

 

[IRstuff]

There's something from Oklahoma State about a metal-free zone for food prep areas that use metal detectors to detect metal contamination of food.

A few links that indicate 430 as usuable around foods:

http://www.bssa.org.uk/topics.php?article=45

http://www.galasource.com/food-prep...dList.aspx?manufacturer=fausett-international

http://www.foodequipmentprice.com/index.php?chop=chopper&meat=111517

http://www.equipmenthouse.com/Worktable.htm

TTFN

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[EdStainless]

Many food processing plants require that magnetic grades of SS be used so that they can be more easily detected and trapped.
Just make sure that your 430 is low carbon and well annealed or sensitization is likely. If you are using thin sheet and welding use 439 for those parts, and if you are forming sheet use Ultraform from AK.

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[ornerynorsk]

430 is specifically allowed for the fabrication of equipment in the foodservice industry by NSF regs and guidelines.

It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.

 

[mcguire]

I concur. 430 Is specifically allowed. The spec calls for 16% minimum chromium. I advise you, however, that 430 in restaurant applications encounters problems if it is used in the #3 or #4 polished condition. These finishes corrode easily. To save money use 430 with a rolled finish, e.g. Koolline or bright anneal. 201 is also a very good money saving substitute for 304.

Michael McGuire

http://stainlesssteelforengineers.blogspot.com/

 

[arunmrao]

Any info regarding price differential between 201 and 430. Is it significant?

_____________________________________
"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year

 

[mcguire]

In effect 201 is about 4% of the current price of nickel above 430.

Michael McGuire

http://stainlesssteelforengineers.blogspot.com/

 

[EdStainless]

The big bang for 201 is if you can go with lower wall thickness because of the higher strength.
201 also forms better than 430.

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