Lantern

• Material：EN 10213: 1.4931
• Weight：24.0Kg
• Dimension/mm：Φ318×300
• Key Features：Material is prone to have black dots in melting;
  Easy to have crack defects (Hard and Crasp);
  High difficulty in shell making, melting, heat treatment and shapping;
  Strict requirement in machinining tolerance and sealing surface roughness.