Materials and finishes for sheet metal parts and CNC machined parts

short description:

Custom Manufacturing:

Product Detail

Product Tags

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.

Material and Finish for Sheet Metal Parts

For a rough classification, sheet metal materials mainly include Carbon Steel, Stainless Steel, Aluminum Alloy and Copper Alloy 4 major categories.

And sheet metal finishes mainly include Brushing, Polishing, Electroplating, Powder 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.

Sheet Metal Parts from carbon steel with Zinc plating

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.

Stainless steel with 2B finish, just keep the raw material finish.

Sometimes to get a cosmetic surface, we will do brushing finish on stainless steel sheet metal parts.

Sheet Metal Parts from carbon steel with Powder coated Yellow

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.

Stainless steel with different brushed finish effect

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.

Custom sheet metal parts with different finish

Table 1. Common Material and Finish for 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.

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
Aluminium	AL5052-H32, AL5052-H0 AL5052-H36 AL6061 AL7075	0.5-6.5mm
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

Material and Finish for CNC Machined parts

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.

Custom CNC machined parts with different finishes

Sandblasting and anodizing finishes on aluminum extruded tubes.

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.

Copper parts with nickel plating finish

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

Table 2. Common Material and Finish for CNC machining parts

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	Steel 12L14	As machined
PTFE (Teflon)	Copper	C36000	Nickel/Gold/Tin plating
PMMA(Acrylic)	Zinc alloy	C36000	As machined
PVC	Titanium	6Al-4V	As machined