1）. Chemical composition(%) Grade C Si Mn P S Ni Co Cu Fe Nickel 200 <0.15 <0.35 <0.35 <0.01 >99.0 <0.25 <0.40 2. Physical properties Grade Density (g/cm3) Melting Range (℃) Curie point (℃) Volume resistivity (μΩ.cm) Thermal conductivity (W/m. ℃) Nickel 200 8.89 1435-1446 360 8.5(20℃) 79.3(20℃) 3）. Mechnical properties FORM Yield Strength (Mpa) Tensile Strength (Mpa) Elongation (%) Hardness (RB) Bar Hot-finished 105-310 60-85 55-35 45-80 Cold-drawn,annealed 105-210 55-75 55-40 75-98 Strip Hard 480-795 620-895 15-2 >90 Annealed 105-210 380-580 55-40 <70 Wire Annealed 105-345 380-580 50-30 No.1 Temper 275-520 485-655 40-20 Spring Temper 725-930 860-1000 15-2