Q215 Steel Carbon Structural Steel

What is Q215 Steel?

Q215 steel is a carbon structural steel with carbon structural steel. This comprehensive guide covers chemical composition, mechanical properties, and machining characteristics per GB/T standards.

Chemical Composition

Element Content (%) Standard
C 0.12-0.19 ASTM/GB
Mn 0.35-0.65 ASTM/GB
P ≤0.035 ASTM/GB
S ≤0.035 ASTM/GB
Si 0.17-0.37 ASTM/GB
Fe Balance ASTM/GB

Mechanical Properties

Property Value Standard
Tensile Strength ≥335 MPa GB/T 699
Yield Strength ≥215 MPa GB/T 699
Elongation (in 50mm) ≥31% GB/T 699
Hardness (Vickers) 110 HV GB/T 4340
Density 7.85 g/cm³ At 20°C

Key Features

  • Good mechanical properties for structural applications
  • Suitable for heat treatment
  • Good machinability in annealed condition
  • Widely used in construction and manufacturing
  • Cost-effective carbon steel

Common Applications

  • Structural components and frames
  • Machine parts and shafts
  • Bolts and fasteners
  • Automotive components
  • Construction equipment

Machinability

Q215 steel has good machinability. Recommended: Carbide tools, cutting speed 100-180 m/min, feed 0.15-0.35 mm/rev, soluble oil coolant.

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