Materials and finishes for sheet metal parts and CNC machined parts

Products Details

Zinc plating,Nickel plating and chrome plating is commonly used on steel sheet metal parts for anti-corrosion purpose. Sometimes the plating also plays a decorative role.Powder coating is a kind of epoxy resin coating, its thickness always between 0.2-0.6mm,which is much thicker than plating layer.  Powder Coat finish is suit for some outside sheet metal parts which are not sensitive to tolerance and want to get customized colors. Stainless steel has a better rust resistance ability, widely used in automation equipment, Medical device, kitchen wares and many kinds of outdoor brackets, shells. Stainless steel parts usually no need any finish, just keep the raw material with 2B finish or Brushed finish.HY metals is your best supplier of custom sheet metal parts and machining parts with more than 10 years of experience and ISO9001:2015 cert. We own 6 fully equipped factories including 4 sheet metal shops and 2 CNC machining shops. We provide professional custom metal and plastic prototyping and manufacturing solutions. HY Metals is a grouped company providing one-stop service from raw materials to end use products. We can handle all kinds of materials including Carbon Steel, Stainless steel, Tool steel, Brass, Aluminum, and all kinds of machinable plastic.The commonly used materials for CNC machining parts including Steel, Stainless steel, Aluminum, Brass, and all kinds of machinable plastic material. CNC parts usually required a tight tolerance, so the coating layer is not allowed too thick. Electroplating for steel and copper parts , anodizing for aluminum parts are the most popular finishes.
Materials

Thickness

Finish
Cold rolled steel SPCC SGCC SECC SPTE Tin plated steel

0.5-3.0mm

Powder coating (Custom colors are available) Wet painting (Custom colors are available) Silkscreen  Zinc plating (Clear,Blue,Yellow) Nickel plating Chrome plating E-coating,QPQ
Hot rolled steel SPHC

3.0-6.5mm

Other mild steel Q235

0.5-12mm

Stainless steel SS304,SS301,SS316

0.2-8mm

2B Finish raw material, Brushed raw material Brush, Polishing Electro-polish Passivate
Spring steel Suit for spring clips SS301-H,1/2H,1/4H,3/4H

 

None
  Mn65  

 

Heat treatment
Aluminium AL5052-H32, AL5052-H0 AL5052-H36 AL6061 AL7075

0.5-6.5mm 

Clear chemical film Anodizing, Hard anodizing (Custom colors are available) Powder coating (Custom colors are available) Wet painting (Custom colors are available) Silkscreen Sandblasting Sandblast+ Anodize Electroless Nickel plating Brush, Polish
 
Brass Widely used in Electronic components, conductive connection parts

0.2-6.0mm 

Tin plating Nickel plating Gold plating Raw material finish
Copper
Beryllium Copper Phosphor copper
Nickel silver alloy Electronic shielings

0.2-2.0mm

Raw material
 For a rough classification, sheet metal materials mainly include Carbon SteelStainless SteelAluminum Alloy and Copper Alloy 4 major categories. And sheet metal finishes mainly include BrushingPolishingElectroplatingPowder coating , Painting and Anodizing. Carbon steel is one of the most commonly used materials in sheet metal fabrication. It is much stronger than Aluminum and much cheaper than Stainless steel. But steel is obviously easy to rust. Then a coating finish will be necessary for steel parts.Sometimes to get a cosmetic surface, we will do brushing finish on stainless steel sheet metal parts.Aluminum alloy is widely used in aerospace and shells of some equipment to reduce weight and get good rust protection. At the same time, aluminum alloy also has a very good coloring ability when anodizing. You can get any beautiful color you want on your aluminum sheet metal parts.Sandblasting and anodizing finishes on aluminum extruded tubes. Sandblast finish can cover the material defects or tooling marks of machined parts. Anodizing can get the anti-corrosion ability and same time get the ideal color for aluminum parts. So sandblasting+ anodizing is a very perfect finish option for almost all the cosmetic aluminum parts. 

Sandblasting and anodizing finishes on aluminum extruded tubes.

For copper alloy parts, the most commonly used surface treatment is tin plating and nickel plating.
Plastic and Finish Metal alloy   Finish
ABS

Aluminum alloy

Al6061-T6,AL6061-T651 Deburr, Polish, Brush
Nylon AL6063-T6, AL6063-T651 Anodize,Hard anodize
PC AL7075 Sandblast
POM(Delrin) AL1060,AL1100 Electroless nickel plate
Acetal AL6082 Chromate/chrome chemical film
PEEK Stainless steel SUS303,SUS304,SUS304L Passivate
PPSU(Radel® R-5000) SUS316,SUS316L As machined
PSU 17-7 PH, 18-8 PH As machined
PS Tool steel A2,#45,other tooling steel Heat treatment
PEI(Ultem2300) Mild steel Steel 12L14 Nickel/chrome plating
HDPE Brass As machined
PTFE (Teflon) Copper C36000 Nickel/Gold/Tin plating
PMMA(Acrylic) Zinc alloy As machined
PVC Titanium 6Al-4V As machined
Sandblasting and anodizing finishes on aluminum extruded tubes.Sandblast finish can cover the material defects or tooling marks of machined parts. Anodizing can get the anti-corrosion ability and same time get the ideal color for aluminum parts. So sandblasting+ anodizing is a very perfect finish option for almost all the cosmetic aluminum parts.

Custom CNC machined parts with different finishes

Custom sheet metal parts with different finish

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