Product Details

Standard carbon steel pot magnets rust quickly in wet, salty, or acidic environments. That's where stainless pot magnets prove their value. By replacing the ordinary steel cup with 304 or 316 stainless steel, these magnets withstand high humidity, salt spray, and regular washdowns without red rust bleeding onto your product or equipment. For example, a 50mm stainless pot magnet with 316 cup and N42 neodymium delivers 75 kg pull force while surviving 500+ hours in salt spray test (ASTM B117) – impossible for regular plated pots. Common users: food conveyor belts (hygiene), dock latches (saltwater), chemical mixing tanks (acid resistance), and outdoor digital signage (UV rain). Our stainless pot magnets are laser‑welded shut, preventing liquid ingress into the magnet cavity. No epoxy degradation, no swelling, no contamination risk.

Technical Specifications – Stainless Series

Type	Cup Material	Magnet Core	Pull Force (kg on 10mm steel)	Salt Spray Resistance	Typical Application
32mm pot, countersunk	304 stainless	NdFeB N45	40	200h	Food conveyor side guides
50mm pot, stud mount	316 stainless	NdFeB N48	110	500h	Marine hatch latch
65mm pot, rubber boot	304 stainless	Ferrite Y35	18	300h	Pharma cleanroom holder
80mm pot, blind hole	316L stainless	NdFeB N50	180	600h	Chemical tank magnetic mixer

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Key Advantages – Stainless vs. Carbon Steel Pot Magnets

Zero rust – no staining of food products or cleanroom surfaces

Laser‑welded cup – fully hermetic seal, IP67 rated for underwater use up to 1 meter

316 stainless version resists chlorides (swimming pools, seawater) and most acids (pH 4–10)

Easy to sanitize – smooth cup surface, no crevices for bacteria growth

Non‑magnetic cup body (austenitic stainless) does not short‑circuit the magnetic field – same pull force as carbon steel pots

Applications Where Stainless Pot Magnets Excel

Food & beverage processing – holding stainless steel covers on mixers, magnetic traps for metal debris (hygienic design).
Marine & offshore – magnetic dock fenders, hatch holders, ROV release mechanisms (no rust after 2 years).
Pharmaceutical & cleanrooms – mounting brackets for equipment that require frequent washdown with disinfectants.
Outdoor signage & solar – permanent mounting on steel poles, no paint chipping or rust streaks.

A Norwegian seafood processing plant replaced 200 carbon steel pot magnets with our stainless pot magnets (304 series). After 14 months in a humid, salty environment, all units remained rust‑free and maintained ≥95% of original pull force. The previous magnets had failed within 6 months.

Why Source Stainless Pot Magnets From Us

30 years in magnetic assemblies – we understand austenitic stainless properties (non‑magnetic cup doesn't weaken the magnet).
In‑house laser welding – precise, narrow heat‑affected zone, no warping of thin cups (0.8mm–2.0mm).
Passivation treatment after welding – removes iron contamination, restores corrosion resistance.
Full traceability of stainless coils (mill certificates available for 304/316L).
Sample lead time: 10 days for standard diameters with stainless cup.

Packaging & Shipping

Each stainless pot magnet is individually bagged with a silica gel pack to prevent any condensation during sea freight. For food‑grade orders, we use FDA‑compliant polyethylene bags and cleanroom‑grade cartons. All shipments include a material test report (MTR) for the stainless steel batch and a pull force certificate. We ship via air (for urgent samples) or sea (FOB Ningbo). For EU customers, we provide full REACH and RoHS declarations.

After-Sales & Warranty

3‑year warranty against rust or pitting on stainless cup (provided the magnet is not mechanically damaged). 2‑year warranty on magnetic pull force (≥80% of rated value). Free replacement for any unit showing weld seam leakage. Technical support available within 24 hours, including video inspection of returned products.

FAQ – Stainless Pot Magnets

Q: Are stainless pot magnets as strong as carbon steel ones?

A: Nearly identical – austenitic stainless is non‑magnetic, so it does not steal flux from the working face. Our 316 stainless pot achieves 97–100% of the pull force of a same‑size carbon steel pot. The slight difference comes from lower magnetic permeability of stainless vs. low‑carbon steel, but we compensate with tighter air gaps.

Q: Can you make a stainless pot magnet with a countersunk hole?

A: Yes – we can machine a countersunk hole through the stainless cup, but the screw will be exposed to the environment. For fully sealed applications, we recommend a blind hole or a stud mount. We also offer a stainless screw included.

Q: What is the maximum operating temperature for stainless pot magnets?

A: For NdFeB core: 80°C standard, 150°C with high‑temp grade. For ferrite core: up to 250°C. The stainless cup itself handles up to 400°C without deformation, but the magnet inside will lose strength first.