Surface Finishing Tutorial
#128 Materials and Electroplating
Category : Electroplating
August31, 2012
Material types and difficulty of electroplating are explained.
[Table] Steel Alloys and Plating Difficulties
Type | Characteristics | Application Example | Difficulty Level |
Structural Steels | Steructural Carbon Steel | Low carbon | All industrial applications | ◎ |
Structural Alloy Steel | Medium and Low CarbonLow carbon, Low alloy, Hardenability ensured steel | Mechanical components | ◎ |
| H Steel |
AL-Cr-Mo Steel | Surface nitrided steel | Automotive and mechanical components | ○ |
Ni-Cr Steel | Old case haedened steel included. Better hardenability and strength than normal carbon steel. Ni additive improves hardenability and Mo additive improves tempering characteristics.
Note) ◎ Able to obtain good adhesion characteristics. | Machine components such as crank shafts, gears, shafts, bolts, nuts.
Note) ○ Requires sufficient attention to pre-processing. | ◎ |
Ni-Cr-Mo Steel | ◎ |
Cr Steel | ◎ |
Cr-Mo Steel | △ |
Special Purpose Steels | Tool Steel | High carbon | Tools, Spring steel | ○ |
| Carbon Tool Steel |
Alloy Tool Steel | High carbon. For machining, for impact resistance, for abrasion deformation resistance, for hot working. | Tools, Spring steel | ○ |
High Speed Steel | High carbon, high alloy. Basic form is 18W-4Cr-1V. | Tools, dies, punches, rolls, bearings | ○ |
Heat and Corrosion Resistant Steel | Stainless steels: Ferritic, Martensitic, Austenitic, and precipitation hardening types. | Tools, bearings, cutlery, gears, razor blades, etc. | ○ |
Heat and Corrosion Resistant Alloy Steel | Hardly contains carbon, mainly composed of Ni. Less than 50% of Fe. | Lead frames, semiconductor systems, precision machine components, watches, valves. | ◎ |
Castandforgingsteels | Forged Steel | Medium/Low carbon | Structural material | ◎ |
Cast Steel | There are normal cast steel (carbon steel) and alloy cast steel. Used after homogenized annealing. | Chains, anchors | ◎ |
CastIron | Gray cast iron | Also called normal cast iron. Contains 2.4-4.5% carbon. | Cylinders, liners, piston rings. | ◎ |
Nodular Graphite Cast Iron | Also called Ductile casting iron. Mg and etc. are added and graphite is made nodular. Has high strength. | Fittings for steel pipes, car parts
Note) ×: Cannot be plated.
| × |
Malleable cast iron | There are: Black heart malleable cast iron, White heart malleable cast iron, Perlite, and Cast iron, depending on applied heat treatment. | Fittings for steel pipes, car parts | ◎ |
Alloy cast iron | Chilled cast iron alloy, Acicular cast iron, Ni-resist cast iron | Cam shafts, dies, cylinders, etc. | ◎ |
|