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High quality carbon structural steel

Name Brand Specifications Executive standard Chemical composition analysis (melting composition)% Performance characteristics Purpose
C Si Mn P  ≤ S  ≤
High quality carbon structural steel 20 Φ18~130 GB/T 699 0.17-0.23 0.17-0.37 0.35-0.65 0.035 0.035 It has enough shaping and toughness, and its performance is higher than the relevant requirements of national standards Small carburized parts such as small shaft, small module gear and piston pin
45 Φ18~130 0.42-0.50 0.17-0.37 0.50-0.80 0.035 0.035 The comprehensive mechanical properties are good, and the properties are higher than the relevant requirements of national standards Small section, medium load modulators, such as spindle, crankshaft, gear, connecting rod, sprocket, etc
55 Φ18~65 0.52-0.60 0.17-0.37 0.50-0.80 0.035 0.035 High strength, hardness and performance are higher than the relevant requirements of national standards t is used to make connecting rod, roller, gear, flat spring, wheel rim, rim, etc. and also as casting


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