St52 Steel Properties Physical Properties. Material St 52-3 Density 7.85 g/cm3; Melting point 1420-1460 °C (2590-2660 °F) Mechanical Properties. The datasheet below shows St52 steel yield strength, tensile strength, elongation and impact resistance. Structural Steel St52-3 Hardness 180 HB, annealedUser Interaction Count: 31.0570 Material St52-3 Steel Equivalent, Properties st52 mechanical properties

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