XRF Scrap Metal Testing: How to Identify Stainless Steel, Nickel, Copper & Aluminium Alloys

By Telos Instruments Trading LLC · Al Uthman Building, Deira, Dubai, UAE · Published 9 October 2026

Why Grade Identification Matters for UAE Scrap Dealers

Scrap is priced by grade, not by colour. Stainless steel, nickel alloys, copper alloys and aluminium can look alike, yet sell at very different prices. Misgrading costs money both ways: valuable material sold cheaply, or low-grade material bought at a premium. In the busy yards of Dubai, Sharjah and Ajman, where mixed loads move fast towards mills and export buyers, magnet and spark tests are too slow and too dependent on operator experience. XRF replaces judgement with measurement at the point of purchase.

How XRF Identifies an Alloy

1. Excitation: the analyzer directs an X-ray beam at the metal’s surface.
2. Fluorescence: each element in the alloy re-emits energy at its own characteristic wavelength.
3. Calculation: the detector reads these signals and the software calculates each element’s percentage.
4. Grade match: the chemistry is compared with a stored grade library and the closest match is reported.

The process is non-destructive, and most shapes need little or no preparation. Clean contact between the analyzer window and the metal gives the most reliable result.

Identifying Each Alloy Family

Stainless steel (304, 316 and others)

Stainless grades look alike and often share magnetic behaviour, so a magnet can’t separate them. XRF reads chromium, nickel and molybdenum directly. The key distinction is molybdenum: 316 contains it, 304 essentially does not. Since 316 usually commands a higher price, this single check often pays for the analyzer.

Nickel alloys

Nickel-based alloys and nickel-bearing grades are among the most valuable scrap and the hardest to recognise by eye. XRF measures nickel along with chromium, molybdenum, cobalt, iron and other elements to identify them, protecting you from selling premium material at ordinary scrap prices.

Copper alloys

Copper, brass (copper-zinc) and bronze (copper-tin) are separated by reading copper, zinc, tin, lead and other alloying elements. Correct sorting keeps each bin to a single grade, which buyers pay more for.

Aluminium alloys

Aluminium scrap spans many alloy series. Separating them depends on elements such as magnesium, silicon, zinc and copper. Because magnesium and silicon are light elements, the analyzer must be able to read them, which is why the EulerX 900S adds Mg, Al, Si, P and S detection for aluminium-heavy yards.

Where XRF has limits

Handheld XRF generally does not measure carbon, so distinctions that rely on carbon content may need other methods. Always confirm your target grades’ requirements with your supplier before choosing a model.

The Instruments: Pi900E, EulerX 900 and EulerX 900S

Pi900E vs EulerX 900 vs EulerX 900S — Comparison

Practical Tips for UAE Yards

• Test at intake before agreeing a price, then re-test sorted bins before shipping.
• Clean the surface, and test coated or painted pieces on a bare spot where possible.
• Use a test stand and backscatter shield for safe, hands-free testing.
• Keep stored results against lot numbers for export buyers.
• XRF devices contain a low-level X-ray source, so import and use may require registration with the relevant UAE authority; your supplier can guide you.

Frequently Asked Questions