POLMAX Stainless Steel 
 Sweden POLMAX Optical Ultra-side stainless steel, ultra-precision mirror-polished, and very high degree of purity, anti-acid high. POLMAX by double melt processing (electroslag re-melting + vacuum re-melting), high purity, impurities, and degree of plaque plate greatly reduced, providing a high polishing performance can be achieved by optical-grade mirror effect, excellent anti-rust rust resistance, heat deformation less Uses: suitable for high demands of the mirror mode, such as injection molding a CD, the lens of the products. factory condition: annealing to about HB200 chemical composition (%): C: 0.38 Cr: 13.6 Mn: 0.5 Si: 0.8 V: 0.3