This is a Medium Carbon cold rolled steel strip l with a very high yield strength. This allows objects made of this steel to return to their original shape despite significant bending or twisting after hardening and tempering. usually in soft annealed condition but can also be supplied in temper rolled hardness in range between 200-300Hv ( band range is +/-40 Hv )

cold rolled strip: This grade of Steel is popularly known as Annealed Steel Strips, Cold Rolled Steel Strips with medium caron, Carbon Steel Strip.

This grade of steel strip is used where fatigue values and elastic limits are not critical, is used for applications in which high strength, hardness and wear resistance are important. This grade of steel strips has good forming, blanking and bending properties.

Recognizing the critical role of leaf spring steel in the automotive industry, we offer high-grade steel that guarantees strength, flexibility, and resilience. Our leaf spring steel is engineered to endure the toughest conditions, ensuring optimal performance and longevity.

Properties of C55 grade cold rolled annealed steel strips

Properties of C55 grade cold rolled annealed steel strips / Chemical composition by weight
Carbon     0.50 - 60%  
Manganese     0.60 - 0.90%  
Silicon     0.0 - 0.35%  
Sulphur     0.025%  
Phosphorous     0.025%  
This grade is similar to 55C6        
Physical properties
  • Hardness is annealed condition 200Hv Max
  • Yield strength 270 N/MM2
  • Elongation 30% Minimum
  • Tensile strength 590N/mm2
  • Surface bright and free from any detrimental surface defect
  • Edges Clean slit
Bend Test: Strips shall pass bend test as recommended below
• Bend test When bending maintain radius as follows :
      Grain Wise   Against Grains
For thickness 4.00 mm to 2.50 mm     r=2t   not advised
For thickness 2.30 mm to 1.20 mm     r=1t   not advised
For thickness 1.0 mm to 0.50 mm     r=0t   r=1t
For thickness 0.45 mm to 0.20 mm     r=0t   r=0r
'r' stands for radius of bend and 't' for thickness of strip. Other Properties
Form of Supply
  • Usually in coils, thicker strips can also be supplied in cut to length and levelled strips
  • Edges are slitted
  • Coil ID 300-500mm as per mutual agreement with buyer
  • Coil weight as per mutual understanding with buyer
  • Surface finish is bright suitable for electroplating
Width: Usually is between 300-450mm, however we can slit as per customers requirement.
Thickness: 45mm to 0.20mm range as per following divisions and thickness tolerance.
  • 4.50mm + 0.07mm
  • 3.50mm + 0.05mm
  • 3.20mm + 0.05mm
  • 3.0mm + 0.05mm
  • 2.60mm + 0.04mm
  • 2.50mm + 0.04mm
  • 2.30mm + 0.04mm
  • 2.00mm + 0.04mm
  • 1.80mm + 0.04mm
  • 1.75mm + 0.04mm
  • 1.60mm + 0.03mm
  • 1.50mm + 0.03mm
  • 1.40mm + 0.03mm
  • 1.20mm + 0.03mm
  • 1.0mm + 0.03mm
  • 0.90mm + 0.03mm
  • 0.80mm + 0.03mm
  • 0.70mm + 0.03mm
  • 0.60mm + 0.03mm
  • 0.55mm + 0.02mm
  • 0.50mm + 0.02mm
  • 0.45mm + 0.02mm
  • 0.40mm + 0.02mm
  • 0.30mm + 0.02mm
  • 0.25mm + 0.02mm
  • 0.20mm + 0.02mm

We accept orders for other specific thickness. However the order quantity and lead time for supply is to be confirmed by us.
PS: Sizes mentioned are for reference only and may change following trends.

Few of Application/Uses of C55 grade steel strip

Few of Application/Uses of C55 grade steel strips

  • Pen clips
  • Hair pins
  • Seat belt parts, buckles
  • Agriculture sickles
  • Machetes
  • Automotive parts
  • Chains and links
  • Shoe shanks
  • Safety shoes toes
  • Fasteners
  • Washers
  • Hose clamps
  • Various types of clamps
  • Horticulture tools
  • Can opener
  • Washers
  • Shims
  • Car horn support plates
  • Clutches
  • Plastic and paper cutting blades
  • And parts requiring resistance to wear and tear
  • Clips for wheel balancing
  • Garment hanger clips
  • Hobby knives