Cold Steel Coil for Pipe Making

  Cold Steel Coil for Pipe Making   Brief Introduction Cold Steel Coil is steel that has been worked below its recrystallization temperature by passing it between a pair of rollers. Recrystallization temperature is the temperature at which grains in the lattice structure of the metal have been rearranged, leaving it free of strain and deformations. Cold Steel Coil is pre-treated before being Cold Rolled with a process known as pickling, which uses strong acids to remove scale and other impurities. The Cold Steel Coil is then passed through rollers to reduce its thickness. Most cold rolling takes place in multiple passes and as the size of the Cold Steel Coil is further reduced, its strength and hardness both increase, but its ductility decreases. After cold rolling, heating the metal up in a process known as annealing can restore some of its ductility. The final Cold Steel Coil may be manufactured in the form of sheets, strips, bars, or other forms.   Production Flow Chart   Specification 1. Thickness: 0.4-2.0mm 2. Width: 900-1250mm 3. Inner Diameter: 508 & 610mm 4. Weight of Steel Coil: 3-15MT 5. Heat Treatment: Annealed + Smoothed 6. Margin Status: EC & EM 7. Surface Quality: FC & FD 8. Surface Treatment: Oiling 9. Surface Status: Bright   Chemical Components

Grade	Chemical Components
	C	Mn	P	S	Alt
St12	≤0.10	≤0.50	≤0.035	≤0.025	≥0.020
St13	≤0.08	≤0.45	≤0.030	≤0.025	≥0.020
St14	≤0.08	≤0.40	≤0.025	≤0.020	≥0.020

  Mechanical Properties 1. Yield Strength: ≤320MPa 2. Tensile Strength: ≤370MPa 3. Elongation (L=50mm, b=25mm) When: (1) Nominal Thickness <0.25mm: 30% (2) Nominal Thickness 0.25mm-<0.40: 32% (3) Nominal Thickness 0.40-<0.60mm: 34% (4) Nominal Thickness 0.60-<1.0mm: 36% (5) Nominal Thickness 1.0-<1.6mm: 37% (6) Nominal Thickness >1.6mm: 38%   Horizontal Packing   Vertical Packing   Application 1. Base metal for coated and dipped products. 2. Home appliance and home furniture 3. Bicycle 4. Building industry 5. Battery Shell 6. Automobile fitting, hardware 7. Industrial products including motors, generators   Certificates   Quality Control & Test Instruments   Production Line   Stockhouse   Factory Overlook    Superiority 1. High precision of dimensional tolerance 2. Excellent mechanical property such as the yield strength and tensile strength, etc. 3. Being highly resistant to denting 4. Exhibits useful magnetic properties 5. High quality surface finish and get well prepared for the surface coating 6. Available in a variety of sizes and shapes with characteristics useful in a wide range of applications          

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