Hot-rolled plate 50# (i.e., Grade 50 steel) is a high-quality carbon structural steel widely used in machining, automotive manufacturing, and other fields. Below is its key information:

1. Material Properties

• Chemical Composition: Carbon content 0.47-0.55%, silicon content 0.17-0.37%, with high tensile strength (≥630MPa)2.
• Heat Treatment Process: Typically normalized or quenched + tempered to optimize mechanical properties2.
• Surface Treatment: Pickling process removes oxide layers, surface roughness controlled at Ra0.8-1.6μm, suitable for high-precision coating or plating requirements2.

2. Application Scenarios

• Automotive Components: Commonly used in critical load-bearing parts such as brake pedals and clutch components. In lightweight design for new energy vehicles, weight reduction of 35% can be achieved by thinning the plate2.
• Stamping Processing: In complex processes like sharp-angle stamping, high-wear-resistant materials (e.g., 8566 alloy) are required to extend punch life and prevent cracking issues1.
• Mechanical Structural Parts: Suitable for high-strength mechanical components such as gears and transmission shafts.
  
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• Application Fields

  • Mechanical Parts: Wear-resistant components such as gears, transmission shafts, rollers, and friction discs12.
  • Mold Manufacturing: Mold bases, plastic mold frame plates, requiring tempering to 19-22HRC to improve machinability13.
  • Automotive Industry: Medium-load parts such as brake pedals and clutch components23.