Stainless Steel Scrap 304 vs 316: Why the Grade Matters

Stainless steel scrap 304 is the grade most workshops, kitchens and fabricators in Abu Dhabi have lying around: sinks, hoods, handrails, tank offcuts and pipe. Grade 316 looks exactly the same but pays more. Knowing which one you have decides whether you are paid for 316 or for 304.

Quick answer: 304 and 316 are both non-magnetic stainless grades, but 316 carries molybdenum and a little more nickel, so it is priced higher. A magnet cannot tell them apart. Check for stamps like 316L, think about where the metal came from, or have it tested with an XRF analyser. Keep each grade separate and clean to be paid for what it really is.

Why is stainless scrap worth more than ordinary steel?

Ordinary steel is mostly iron, and iron is cheap. Stainless steel is iron with chromium and nickel added, and some grades also carry molybdenum. Nickel and molybdenum are the expensive parts. That is why a kilo of stainless pays several times more than a kilo of ordinary steel scrap, and why the grade matters so much when a load goes on the scale.

Nickel is traded on the London Metal Exchange, and stainless scrap rates follow it closely. When nickel moves, the rate for 304 and 316 moves with it, sometimes within the same week. That is one reason no serious yard prints a fixed stainless price on a website.

The grades you will actually see

Four grades cover nearly all the stainless that comes through a yard in Musaffah. The table sets out how they differ and where they usually come from. It compares value, not prices, because the prices change every day.

Grade	What is in it	Magnet	Where you find it	Value compared to 304
304 (also called 18/8)	About 18% chromium and 8% nickel	No pull, or very slight after bending	Sinks, kitchen equipment, food tanks, handrails, most pipe	The baseline
316	Like 304, plus molybdenum and a little more nickel	No pull, or very slight	Marine fittings, desalination and chemical plant, pool equipment	Higher
201	Low nickel, more manganese	No pull or slight, more after cold work	Cheaper furniture, railings, household goods	Lower
430	Chromium with little or no nickel	Strong pull	Appliance panels, trims, cheap cookware	Much lower

Why sorting by grade pays

Stainless scrap ends up at a melt shop that makes new stainless, and the melt shop has to know what goes into the furnace. A clean pile of one grade is easy to sell on. A mixed pile has to be sorted and tested first, and that work comes out of the rate you are offered. Every bit of sorting you do yourself stays in your pocket.

The magnet test and where it stops working

A magnet is the first tool any scrap buyer reaches for, and it should be yours too. Use a strong one. A small neodymium magnet from a hardware shop works well. Hold it against a clean part of the metal, not a weld, a bolt or a bracket.

• No pull at all: most likely 304 or 316. It goes in the good pile.
• A faint pull on a bend, an edge or a cut: often still 304. Bending and cutting make 304 slightly magnetic.
• A strong pull everywhere, like ordinary steel: 430, or plain steel with a stainless look.

What the magnet cannot do is tell 304 from 316. Both behave the same way. It also will not catch carbon steel that has been chrome plated or painted silver, so give anything suspicious a quick scrape with a file. Real stainless stays bright and the same colour underneath. Plated steel shows a darker grey core, and a painted piece shows its paint layer.

How do you tell 304 from 316?

This is where most of the money sits, and it takes a little more than a magnet.

Look for stamps and labels

Pipe, tube, fittings and plate often carry a printed or stamped mark like 304L, 316L or 316Ti along their length. Valves and flanges usually have the grade cast or stamped on the body. Check before anything is cut up, because once a pipe is in short pieces the marking may be gone. Take a photo of the mark next to the pile. It helps a lot when you ask for a rate.

Think about where it came from

Source tells you a lot. Kitchen and food equipment is almost always 304. Marine fittings, boat rails, desalination and water treatment parts, chemical tanks and pool equipment are often 316, because those jobs need better resistance to salt and chemicals. Along the coast around Abu Dhabi, where salt air eats metal, 316 turns up more often than people expect.

Have it tested

A handheld XRF analyser reads the alloy in a few seconds, and many buyers use one. There is also a chemical spot test for molybdenum, which some fabricators keep in the workshop. If a lot is large, testing a few pieces before you sell is worth the trouble.

One rule covers all of this: if you know a batch is 316, say so and keep it separate. Mixed into a 304 pile, it will be paid as 304.

What lowers the price of a stainless load?

Most of what pulls a stainless rate down is not the grade itself but what comes with it.

• Carbon steel left attached: legs, brackets, bolts, frames and hinges.
• Plastic, rubber, glass, insulation or concrete still stuck on.
• Turnings and swarf soaked in cutting oil or mixed with dust.
• Several grades thrown into one skip.
• Paint or coatings on stainless that was never meant to have them.

The fix for most of these is simple: keep stainless apart from ordinary steel from day one. Once it is in the same skip, sorting it out again takes far longer than doing it right the first time.

Kitchen equipment and sinks

Sinks, worktops, trolleys, shelving and kitchen hoods are mostly 304, but they often come with carbon steel legs, motors, glass or plastic parts. Sold whole, they are graded on what is attached. With the steel and plastic taken off, the stainless body can go in as clean 304. Hotel and restaurant refits are worth a second look: a lot of shelving and racking is stainless under the dust.

Turnings and swarf

Stainless turnings from lathes and CNC machines are bought too, but below solid pieces, because of the oil and fine dust they carry. Keep them dry, keep 304 and 316 turnings in separate drums, and do not let them sit for months in a hot corner of the workshop. Fresh, clean turnings are easy to grade. Old, oily ones are not.

Selling stainless steel scrap to Scrap Buyer Musaffah

Our yard is in Musaffah M42, near Bin Mansoor Plastic Factory, Abu Dhabi. This is how a stainless sale works with us:

1. Send photos on WhatsApp, with any stamps or markings and a rough idea of the weight.
2. We give you the rate before you load, based on grade, cleanliness and the day's market.
3. Your stainless is weighed separately from other metals, in front of you, and you read the scale yourself.
4. The magnet test comes first, then the markings, and the grade is agreed with you before the deal is closed.

Stainless follows the nickel market, so we do not publish a price on the website. Call or WhatsApp +971 52 727 0105 for today's rate, or send the details through our contact page. If the same load has copper, brass or aluminium in it, see the other metals we buy. For how world markets set base prices, read our note on Argus scrap metal prices.