The 431 belongs to Mars stainless steel, commonly known as stainless steel iron<br><br>The 304 belongs to Austrogen stainless steel<br><br>431 relative to 304, high strength, poor corrosion resistance, the price is lower than 304.<br><br>Each of the two materials has its own advantages, mainly depending on the use and cost of selecting materials.<br><br>If you have to be resistant to corrosion and high strength, it can now 2205 two-phase stainless steel, the price is much higher than 304
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