304 vs 316 Stainless Steel: Which Suits an Indoor Light?

You read “304-grade stainless steel” on a light, and a friend says 316 is the better steel. Now you wonder if you are about to hang the wrong metal in your hall. The 304 vs 316 stainless steel question has a clear answer, and the answer depends on salt.

Every metal part we make is 304-grade, so we owe you the honest version. Below you will find the two recipes, three small sums, and the plain science of why stainless steel stays clean. We also tell you where 316 is the better pick.

The short answer

316 has 2% to 3% molybdenum, so it handles salt better. 304 has none of that metal and a little more chromium, and it does the job well away from the sea. For indoor chandeliers, 304 is enough. For steel fixed outdoors within 5 km of a surf beach, choose 316.

304 vs 316 stainless steel: the two recipes

Stainless steel is steel with other metals added. The difference between 304 and 316 stainless steel lies in that mix.

Sources differ a little on nickel. One table gives 8% to 10.5% for 304. PREN means pitting resistance equivalent number, a score for how well a steel resists small salt pits. Higher is better.

So does stainless steel rust? Yes, it can, but only when something beats its surface film. Wikipedia lists 304 as resistant in water with up to about 400 mg of chlorides per litre at room heat. Salt is the usual attacker, because chloride comes from salt.

ASSDA, the Australian stainless steel association, gives the clearest sea rule. Brown marks called tea staining are most likely up to 5 km from a surf beach and 1 km from still sea water. The same body asks for grade 316 at least within those 5 km. Tea staining itself is a surface issue that does not harm the strength of the steel.

How much stronger is 316 against salt?

Three small sums show the gap. The first uses the formula from IMOA, the world molybdenum trade body.

Sum 1: the pitting score from the lowest recipe.

1. The formula is chromium + 3.3 × molybdenum + 16 × nitrogen.
2. 304: 18 + (3.3 × 0) + (16 × 0.1) = 19.6.
3. 316: 16 + (3.3 × 2) + (16 × 0.1) = 24.2.
4. The gap is 24.2 − 19.6 = 4.6 points, close to the 19 and 24 in published tables.

Sum 2: check it against the rule.

1. ASSDA says a score of about 18 is enough away from the sea.
2. A score of about 24 is needed for sea air.
3. 304 scores 19.6, so 19.6 − 18 = 1.6 points clear inland.
4. 304 sits 24 − 19.6 = 4.4 points short for sea air outdoors.

Sum 3: the chromium in a real frame.

1. Take a 4 kg steel frame. The 4 kg is our round example.
2. At 18% chromium: 4 × 0.18 = 0.72 kg of chromium.
3. Steel needs 10.5% to count as stainless: 4 × 0.105 = 0.42 kg.
4. So 304 carries 0.72 ÷ 0.42 = 1.7 times the minimum.

On 3 Nov 2026 we counted the 44 products in our brass and metal range. Forty of them, or 91%, name 304-grade stainless steel on the page. The other 4 say only “metal”, and the same company rule covers them. Twenty-six of the 44, or 59%, carry brass in the name or material. The brass is a finish on the steel, not solid brass.

Why the choice depends on salt: the logic and the science

Follow the chain. Chromium meets the oxygen in air. The two form a film of chromium oxide. LiveScience puts this passive layer at only a few nanometres thick, far thinner than a hair. The film keeps water and air off the metal beneath, so rust cannot start. Scratch the film, and the chromium forms it again by itself.

Chloride breaks that film at tiny points. Wikipedia says these small attacks are most common with chloride around. Molybdenum holds the film together against this attack, and the formula shows the strength: 1% molybdenum counts as much as 3.3% chromium.

Now apply the chain to your room. Homes in Delhi, Jaipur or Pune sit far from any surf, so little salt reaches the frame. A chandelier also hangs indoors, out of rain and spray. So the extra cost of 316 buys nothing you would see. The last step is our own reasoning, because the coastal guidance covers steel outdoors. A sea-facing flat with open windows sits between the two cases, so wipe the frame now and then to lift salt.

Is stainless steel magnetic? Soft 304 and 316 are not. Their atoms sit in a form called austenite, and nickel keeps them there. Bending or drawing the steel turns a little of it into martensite, a form a magnet can grip. So a bent arm may pull a magnet slightly. ASSDA groups both grades together here. A magnet cannot tell 304 from 316, so ask for the grade in writing.

Guides that say “stainless steel never rusts” go too far. The honest line is simple. The film protects the steel while the salt stays low.

Nature gives the ore, hands shape it, light finishes it

Steel is the frame that carries the real hero. Teak grew for decades. Marble and alabaster formed beneath the earth. Glass began as sand. A craftsman looks at the material before deciding how to work with it, and the steel holds that work up for years.

• The Arlo teak chandelier is about 81 cm wide, with four E27 holders, the big screw type, and brass-finish steel arms.
• The Round Art Deco chandelier is 50 cm wide, with real alabaster and black marble panels on a 304 frame.
• The glass globe chandelier is 80 cm wide, with 18 G9 holders for tiny two-pin bulbs, and opal borosilicate glass.

All three are IP20, made for indoor rooms. Bulbs are not included; fit a 3000K warm-white LED. Our craftsmen make every piece in our own factory in India, as they have since 2015. Our legal policies set out a lifetime warranty against rusting on stainless parts, for orders from 4 Oct 2026. The warranty does not cover the surface finish or damage from chemical cleaners. Honest steel, natural material and warm light make the kind of harmony Vastu thinking values.

FAQs

What is the main 304 vs 316 stainless steel difference?

316 adds 2% to 3% molybdenum, so it resists salt better. 304 scores about 19 on the pitting scale, and 316 scores about 24.

Does stainless steel rust at all?

Yes, it can rust or stain where salt beats the surface film. The film repairs itself once the salt is gone, so wipe the frame clean.

Is stainless steel magnetic?

Soft 304 and 316 are not magnetic. Bent or drawn parts can pull a magnet slightly, so a magnet cannot prove the grade.

Is 304 good enough near the sea?

Indoors, yes, with a wipe now and then. For steel fixed outdoors within 5 km of a surf beach, choose 316 at least.

How do I clean a stainless steel chandelier?

Switch off, let the light cool, and use a soft dry cloth. Keep chlorine cleaners away, because chloride attacks the film.

Nature gives the material.
Human hands give it meaning.
Vastu inspires harmony.
Light brings it to life.
That is JagMag.

Ready to choose a frame? See our metal chandelier range, made in our own factory in India, with free shipping across India. Read 202 vs 304 stainless steel for the lower grade, and why we use 304 stainless steel for our own story. Not sure? Video-call us.

Sources

1. Wikipedia: SAE 304 stainless steel, read 3 Nov 2026.
2. Wikipedia: Stainless steel, read 3 Nov 2026.
3. Metal Supermarkets: differences between 304 and 316, read 3 Nov 2026.
4. Anzor: PREN values of stainless grades, read 3 Nov 2026.
5. International Molybdenum Association: stainless grades and properties, read 3 Nov 2026.
6. ASSDA: preventing coastal corrosion, read 3 Nov 2026.
7. ASSDA: magnetic effects of stainless steels, read 3 Nov 2026.
8. Carpenter Technology: magnetic properties of stainless steels, read 3 Nov 2026.
9. LiveScience: why doesn’t stainless steel rust, read 3 Nov 2026.