Description Item 001 Grade: 1650 to 1850 MPa Diameter: 1.40 mm Tensile strength (Rm): 1650 to 1850 MPa Diameter tolerance: 1.38 to 1.42 mm Number of torsions (D): >= 25 Number of turns (wrapping): >= 8 Reduction of area: >= 40.0% Chemical composition: C 0.45 to 0.55, Si 0.15 to 0.30, Mn 0.50 to 0.80, P <= 0.035, S <= 0.035, Cu <= 0.20 Wire finishing: Phosphated Item 002 Grade: 1850 to 2000 MPa Diameter: 2.00 mm Tensile strength (Rm): 1850 to 2000 MPa Diameter tolerance: 1.975 to 2.025 mm Number of torsions (D): >= 22 Number of turns (wrapping): >= 8 Reduction of area: >= 40.0% Chemical composition: C 0.65 to 0.80, Si 0.15 to 0.30, Mn 0.50 to 0.80, P <= 0.035, S <= 0.035, Cu <= 0.20 Wire finishing: Phosphated Item 003 Grade: 1700 to 1900 MPa Diameter: 2.20 mm Tensile strength (Rm): 1700 to 1900 MPa Diameter tolerance: 2.175 to 2.225 mm Number of torsions (D): >= 22 Number of turns (wrapping): >= 8 Reduction of area: >= 40.0% Chemical composition: C 0.65 to 0.75, Si 0.15 to 0.30, Mn 0.50 to 0.80, P <= 0.035, S <= 0.035, Cu <= 0.20 Wire finishing: Phosphated Item 004 Grade: 1750 to 1900 MPa Diameter: 2.20 mm Tensile strength (Rm): 1750 to 1900 MPa Diameter tolerance: 2.175 to 2.225 mm Number of torsions (D): >= 22 Number of turns (wrapping): >= 8 Reduction of area: >= 40.0% Chemical composition: C 0.65 to 0.75, Si 0.15 to 0.30, Mn 0.50 to 0.80, P <= 0.035, S <= 0.035, Cu <= 0.20 Wire finishing: Phosphated Item 005 Grade: 1500 to 1700 MPa Diameter: 4.88 mm Tensile strength (Rm): 1500 to 1700 MPa Diameter tolerance: 4.845 to 4.915 mm Number of torsions (D): >= 12 Number of turns (wrapping): >= 8 Reduction of area: >= 35.0% Chemical composition: C 0.75 to 0.85, Si 0.15 to 0.30, Mn 0.50 to 0.80, P <= 0.035, S <= 0.035, Cu <= 0.20 Wire finishing: Phosphated SpecificationsCapacity: 25 to 100 tonsApplication: Spring wire for bedding
