Trademark b-b: C 0.003 si 0.01 mn 0.13 p 0.009 s 0.006 cr 0.02 ni 0.02 al 0.03 cu 0.02 Trademark b-bc: C 0.002 si 0.01 mn 0.08 p 0.006 s 0.005 cr 0.01 ni 0.01 al 0.01 cu 0.01 Trademark b-cc: C 0.002 si 0.003 mn 0.02 p 0.005 s 0.005 cr 0.01 ni 0.01 al 0.005 cu 0.004 Type mm : Medium plate and steel billet 8-250 , plate coil 12-25 , straight round steel dia6.5-dia300 , round steel coil, cold drawn plate coil 0.5-2.5 tube, etc. We can produce the special type which you ask Applications High purity iron is used largely as the basic material for (re-)melting of low-carbon, Stainless and acid-resistant steels, materials with a high nickel content, magnetic alloys as well as stainless and heat resistant steel castings in induction and vacuum furnaces. High purity iron is also used in many applications of aviation construction, nuclear Technology, the production of magnets (pole cores, yokes and armatures), in automotive construction, as magnetic shielding, as welding rods and fuse wire, as gasket in the chemical and petrochemical industry, power station construction, as anti-corrosion anode and as galvanizing tank including equipment. Mechanical properties Brinell hardness (hb) High purity iron Max. Typical Cold-rolled strip / sheet 105 90 Hot-rolled strip / plate 105 90 Quarto plate 100 90 Round bar 110 95 Electrical and magnetic properties Characteristics typical values Initial permeability 300 – 500 Permeability 3500 - 6000 Coercive force 60 – 120 a/m Saturation induction 2.15 t Density at 20 °c 7.86 kg/dm³ Melting point 1536 °c Linear expansion coefficient Temperature range 0 – 100 °c 12x10-6 1/°c Modulus of elasticity 207 kn/mm²