Compression spring

Material: Carbon Spring Steel (CSS)
Shape: Cylindrical or (Cylindrical compression spring)
Wire diameter range: 0.05mm – 6.0mm
Surface treatment: (Surface treatment): Galvanized, Nickel plated, Black oxide (the most standard in the industry)
Material: Stainless Steel (SUS304)
Shape: Cylindrical (cylindrical), or (cylinder-shaped)
Cylindrical spring → cylindrical spring
Wire diameter range: 0.03 mm – 16 mm
Surface treatment: (Surface treatment): No coating, nickel plating
No coating (No plating)
Nickel plating: Nickel plated
Material: Alloy Steel (alloy steel)
Shape: Convex shape or (mid-convex)
Wire diameter range: 2 mm – 10 mm
Surface treatment: (Surface treatment): Galvanizing, nickel plating
Galvanizing: galvanized
Nickel plating: Nickel plated
Material: Copper Alloy (copper alloy)
Shape: Profile or (irregular-shaped)
Wire diameter range: 0.3 mm – 14 mm
Surface treatment: (Surface treatment): Gold plating, silver plating
Gold plating: gold plated
Silver plating: silver plated
Material: Titanium Alloy (titanium alloy)
Shape: Concave or (concave shape)
Wire diameter range: 0.03mm-8mm
Surface treatment: (Surface treatment): No coating
No coating: No plating or Uncoated
Material: Nickel-based Alloy (Ni-based alloy)
Shape: Hourglass shape
Wire diameter range: 0.3mm-10mm
Surface treatment: (Surface treatment): No coating
No coating: No plating or Uncoated
Material: Beryllium Copper (Beryllium copper)
Shape: Barrel shape
Wire diameter range: 0.1mm-5mm
Surface treatment: (Surface treatment): Gold plating, silver plating
Gold plating: gold plated