Sone304

However, after cold working (bending, rolling, drawing), it becomes . This is due to the transformation of some austenite to martensite.

Some unscrupulous suppliers sell SUS201 as "Sone304" because it looks similar. Always demand a PMI (Positive Material Identification) test using an XRF gun. SUS201 is magnetic and has lower nickel content. Part 8: Physical Properties – Magnetic Response A common myth is that all stainless steel is non-magnetic. SUS304 (Sone304) in the annealed state is mostly non-magnetic. sone304

The "18/8" ratio (18% Chromium, 8% Nickel) is the hallmark of 304-grade steel. If your "Sone304" material does not meet these specs, it is counterfeit. Part 3: Mechanical Properties (What "Sone304" Can Handle) Engineers looking for "sone304" need to know load limits and hardness. Below are the standard room-temperature mechanical properties for annealed SUS304: However, after cold working (bending, rolling, drawing), it

| Element | Percentage (%) | Role in the Alloy | | :--- | :--- | :--- | | | ≤ 0.08 | Increases hardness but reduces corrosion resistance if too high. | | Silicon (Si) | ≤ 1.00 | Deoxidizer; improves high-temperature oxidation resistance. | | Manganese (Mn) | ≤ 2.00 | Improves hot ductility and workability. | | Phosphorus (P) | ≤ 0.045 | Impurity; kept low to prevent embrittlement. | | Sulfur (S) | ≤ 0.030 | Impurity; improves machinability but reduces corrosion resistance. | | Nickel (Ni) | 8.00 – 10.50 | The key austenite stabilizer. Provides ductility and acid resistance. | | Chromium (Cr) | 18.00 – 20.00 | Forms the passive oxide layer (Cr2O3) that prevents rust. | | Iron (Fe) | Balance | Base element. | Always demand a PMI (Positive Material Identification) test

The truth is, (like AISI 304 or EN 1.4301). Instead, it is almost certainly a typographical, transcription, or phonetic variation of the most common stainless steel in the world: Sus304 (often written as SUS304 ).