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410 Martensite Type 304 Austenite Type 430 Ferrite Type 304 Austenite Type : Chemical composition C: 0.15%max Cr: 16~18% Ni: 6~10%Si: 1%max Mn: 2%max hardness: 32~52HRC density: 7.8g/cm3 size 0.3~1.5mm Durability: 6500 Times 430 Ferrite Type: Chemical composition C: ≤0.15% Cr: 16~18% Si: ≤1% Mn: ≤1% hardness: 32~52HRC density: 7.8g/cm3 size 0.3~1.5mm Durability: 6500 Times 410 Martensite Type: Chemical composition C: 0.15%max Cr: 11~13% Si: 1%m