High-Carbon Spring Flat Steel
High-Carbon Spring Flat Steel is made from high-carbon steel strips designed for high strength, excellent elasticity, and fatigue resistance. After proper quenching and tempering, it provides the durability needed for springs, clips, and other load-bearing components. This material is widely used in automotive, industrial machinery, and precision equipment applications where repeated bending and stress resistance are required.
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Product Description

Specifications

ParameterDescription / Range
Material Grades65Mn, 60Si2Mn, SUP9, SAE1070, SAE1095
StandardGB/T 4354, ASTM A228, DIN EN 10089
ShapeFlat strip / rectangular cross-section
Width5mm – 100mm (customizable)
Thickness0.3mm – 10mm (customizable)
HardnessHRC 45 – 55 (after quenching & tempering)
Tensile Strength1200 – 1800 MPa
Surface FinishPolished, Black, Pickled
Length1m – 6m (standard) or customized
Heat TreatmentQuenching + Tempering
CertificationISO 9001, SGS


Applications:

  • Automotive suspension springs
  • Industrial machinery springs and clamps
  • Hand tools and agricultural equipment
  • Precision mechanical devices and clips


Features:

  • High strength and excellent elasticity
  • Superior fatigue and wear resistance
  • Precise dimensions for easy processing
  • Ideal for repeated bending and load-bearing applications


Spring Flat Steel Product Display

flat bar


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