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China 40cr 41cr4 5140 Qt Steel Round Bar / Grade 8.8 Gr. 8

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China DIN1.7035/ AISI 5140/ASTM 5140/JIS SCR440 Alloy

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Steel Bar 5140 Factory, Steel Bar 5140 - made-in-china

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China SAE5140 40cr Scm440 Cold Drawn Polished Alloy Steel

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