Executive standard:
GB / T12769—2005 Coating material: titanium Ti, nickel Ni, zirconium Zr, stainless steel (316L), etc. Base material: copper (T2),
oxygen-free copper (TU2), aluminum (AL) Shape and specifications (mm) Round: φ (2 ~ 80) × (0.5 ~ 3.0) Drum shape: φ (25, 27, 29,
32, 34) × 14 × (1.0 ~ 2.0) Square: side length (10 ~ 40) 5 Flat: length (10 ~100)*width (10 ~30) Fillet transition R (3 ~ 5)