Understanding Metal Grades: From N52 Magnets to Surgical-Grade Steel
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If you've bought magnets from us, you already know that grade matters. An N52 magnet is roughly 30% stronger than an N35 in the same size. That's a big deal when you're holding a Dominus Knight's arm in place.
But magnet grades are just one example of a system that applies across all metals. Every metal alloy has a grading system, and the grade tells you what it's made of, how it performs, and what it's built to handle. Understanding how grading works makes you a smarter buyer whether you're picking magnets, tools, cookware, or anything else made of metal.
How Magnet Grades Work
Neodymium magnets are graded on a scale from N35 to N55. The number represents the magnet's **maximum energy product** measured in megagauss-oersteds (MGOe). Higher number = stronger magnetic field per unit volume.
| Grade | Strength (MGOe) | Best For |
|-------|-----------------|----------|
| N35 | 33-36 | Light-duty, cost-sensitive projects |
| N42 | 40-43 | General hobby use |
| N48 | 46-49 | Heavy weapon swaps, vehicles |
| N52 | 50-53 | Maximum hold in tight spaces |
We use N52 magnets in all our magnetization kits because miniature wargaming demands maximum strength in the smallest possible size. A 3mm x 1mm N52 disc holds a Space Marine arm securely. An N35 in the same size might not.
The grade is baked into the alloy composition. N52 magnets use a specific ratio of neodymium, iron, and boron that maximizes magnetic output. You can't upgrade a magnet's grade after manufacturing. What you buy is what you get.
The Same Logic Applies to Steel
Stainless steel uses a numbered grading system too, and the differences matter just as much.
The two most common food-contact grades are **304** and **316**. Both contain chromium (which makes steel "stainless" by forming a protective oxide layer) and nickel (which improves corrosion resistance and gives the steel its smooth finish).
The difference is one element: **molybdenum**.
Grade 316 contains 2-3% molybdenum. Grade 304 contains none. That molybdenum does for steel what the extra neodymium-iron-boron optimization does for N52 magnets: it makes the material perform better under stress.
For steel, the "stress" is acidic and salty foods. Tomato sauce, citrus, vinegar, and salt all attack the protective chromium oxide layer on stainless steel. Molybdenum reinforces that layer and helps it rebuild faster when damaged. Without it, the steel is more vulnerable to pitting corrosion over time.
Both grades are FDA-approved for food contact. But 316 handles demanding conditions better, the same way N52 handles demanding magnetization jobs better than N35.
Our sister brand Gadget Duke has a detailed breakdown of 304 vs 316 stainless steel for food if you want the full technical comparison, including leaching data and which foods push each grade the hardest.
Why "Grade" Matters More Than "Brand"
Here's something we've learned selling magnets for almost a decade: people spend too much time comparing brands and not enough time comparing specs.
Two magnet sellers can both claim "strong magnets." But if one sells N52 and the other sells N42, the N52 is objectively stronger. The brand name doesn't change the physics.
Steel works the same way. A food container labeled "premium stainless steel" with no grade number is almost certainly 304. A container that specifically says 316L paid more for better material and wants you to know it. The label matters less than the number.
This applies everywhere:
- **Magnets:** N52 > N42 > N35 (for strength per size)
- **Stainless steel:** 316L > 316 > 304 (for corrosion resistance)
- **Titanium:** Grade 5 (Ti-6Al-4V) > Grade 2 (commercially pure)
- **Aluminum:** 7075 > 6061 > 1100 (for strength)
The pattern is always the same. Higher-performance alloys cost more because they contain more expensive elements in more precise ratios. The grade number tells you what you're actually getting.
The "L" Designation
You'll sometimes see **316L** instead of plain 316. The "L" stands for low carbon, with a maximum of 0.03% versus 0.08% in standard 316. Lower carbon improves the steel's performance at welds by preventing a problem called sensitization, where carbon atoms steal chromium from the areas that need it most.
316L is the grade used in surgical implants and pharmaceutical equipment. It's also what [Gadget Duke uses in their food containers](https://gadgetduke.com/blogs/journal/304-vs-316-stainless-steel-for-food-whats-the-difference-and-why-it-matters), because the welds on a container are exactly where acidic liquids tend to sit.
What About the 18/8 and 18/10 Labels?
If you've ever looked at flatware or cookware, you've seen labels like "18/8" or "18/10." These describe the chromium and nickel percentages:
- **18/8** = 18% chromium, 8% nickel = Grade 304
- **18/10** = 18% chromium, 10% nickel = usually Grade 304 with slightly more nickel, sometimes Grade 316
The confusing part: "18/10" doesn't always mean 316. The only way to confirm 316 is to check whether molybdenum is present. Gadget Duke has a full guide to the 18/8 vs 18/10 numbering system that clears this up.
Why We Care About This Stuff
We started Magnet Baron because we thought hobbyists deserved better magnets. Not repackaged craft magnets. Actual N52 neodymium discs sized specifically for miniature wargaming.
That same thinking led to Gadget Duke, our kitchenware brand. The food container market has the same problem the magnet market had: vague labeling, unclear grades, and a lot of "trust us, it's good." Gadget Duke uses 316L surgical-grade stainless steel because the grade actually matters for how the container performs with your food, just like magnet grade matters for how well your Hive Tyrant's arms stay on.
If you're the kind of person who reads spec sheets before buying magnets, you'll probably appreciate the same approach applied to your kitchen.
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Frequently Asked Questions
What does N52 mean on a magnet?
N52 refers to the magnet's maximum energy product of 50-53 megagauss-oersteds. It's the strongest commercially available grade of neodymium magnet. Higher grade = stronger magnetic field in the same physical size.
Is 316 stainless steel better than 304?
For food that's acidic or salty, yes. 316 contains 2-3% molybdenum, which provides better corrosion resistance against acids and chlorides. For water and dry goods, 304 works fine. Both are FDA-approved for food contact.
Why does Magnet Baron only use N52 magnets?
Miniature wargaming requires maximum strength in very small sizes (2mm-6mm discs). At these sizes, the difference between N42 and N52 is the difference between a secure hold and an arm that falls off during a game. We don't sell lower grades because they don't meet the performance requirements.
What is Gadget Duke?
Gadget Duke is our sister brand focused on kitchenware and family products. It uses 316L surgical-grade stainless steel with zero plastic on food-contact surfaces. Same philosophy as Magnet Baron: know the material grade, use the best one for the job.