Nemaco™ - 304 & 316 Stainless Steel NEMA 4X Electrical Junction Boxes, Enclosures & Custom Box Designs
Nemaco Technology, USA Telephone Number, 304 & 316 Stainless Steel Junction Box, Enclosure & Cabinet Solutions


Nemaco Technologys's Reference Section for 304, 316, 316L Stainless Steel
NEMA Electrical Enclosures, Junction Boxes & Cabinets

Welcome to Nemaco Technology's enclosure section that provides basic technical information for the stainless steel electrical NEMA enclosures, junction boxes & cabinets. Nemaco has dedicated this section for Stainless Steel enclosures. Nemaco™ - Stainless Steel NEMA 4X Electrical Junction Boxes & Enclosures, Nemaco Technology, LLC

List of the major topics are discussed in this section:

Stainless Steel Electrical NEMA Enclosures
History of Stainless Steel (discovery)
Stainless Materials, 300 series (304, 316, 316L)
Enclosure Surface Finishes (2B, Grain, Orbital)
Stainless Steel Cross Contamination
Stainless Steel Pickling & Passivating
Stainless Steel Electropolishing
Custom Surface Coatings

In the other specialized technical reference sections there are descriptions of the each type of NEMA Enclosures and stainless steel junction boxes. And there is detailed information for the Stainless Steel enclosure that have NEMA type ratings. Nemaco provides other types of samples of the Stainless Steel enclosures in the the other sections. For example, the other technical sections provide many internal and external photos ofinternal subplates, 19" rack mounts (rackmounts) enclosures with grounding studs and custom features. Of course you can call Nemaco for additional information for any of Nemaco's Tigerbox stainless steel enclosure or any of the other electrical enclosures, cabinets or boxes.

Enjoy the material that we have prepared for you, and if you have any questions, please contact Nemaco by telephone (as listed below) or complete our contact form.

Take a look at the interesting stainless steel info about the history of stainless steel, metalurgy, benefits and common uses in industry.


Nemaco offers stainless Steel Junction Box and Cabinet Systems for Electrical Applications.

    Nemaco - Wall Mounted - 304/ 316 Stainless Steel Junction Boxes & Enclosures

    Stainless Steel - NEMA 3,3R - Electrical Boxes & Enclosures
    Stainless Steel - NEMA 4X    - Electrical Boxes & Enclosures
    Stainless Steel - NEMA 6,6P - Electrical Boxes & Enclosures

    Nemaco - Floor Mounted - 304/ 316 Stainless Steel Cabinets

    Stainless Steel - NEMA 3,3R - Electrical Cabinets, Floor Mount Footing
    Stainless Steel - NEMA 4X    - Electrical Cabinets, Floor Mount Footing
    Stainless Steel - NEMA 6,6P - Electrical Cabinets, Floor Mount Footing

Stainless Steel NEMA Cabinets

Nemaco™ - Stainless Steel Electrical Enclosure & Junction Box for industrial applications, Nemaco Technology, LLC - USA For the industrial electronics and electrical power industries there are many uses for stainless steel enclosures, junction boxes and cabinets. One of the main advantages of the stainless steel for electrical enclosures is the corrosion resistance and the metal enclosures are more durable than carbon steel (of the same metal thickness) and much more durable than most plastics. Also, a field worker can't weld metal fittings to a plastic box.

Electrical Enclosures is a general description for many types of enclosures.

Junction Boxes tend to refer to smaller enclosures used for splicing power and signal wire connections.

Electrical Cabinets tend to refer to larger enclosures used for power and industrial controls.

Refer to the other sections in Nemaco's website for more information on specific types of enclosures.

Stainless Materials, 300 Series (304, 316, 316L)

THere are many different grades (for example, 300 series, 400 series) of stainless steel. For most stainless steel enclosures applications, commonly, the 300 series of 304 and 316 stainless sheet and flat plate are used for fabrication. Occassionaly, 316L is used for fabrication. The 304 stainless steel provide adequate corrosion resistion for most applications. But the 316 stainless steel has more of the chrome element and therefore provide greater corrosion resistance to oxidation (rust). The 316L is not commonly used but has similar corrosion resistance to 316 but less of the carbon element in the metal.

Enclosure Surface Finishes (2B, Grain, Orbital)

The common metal finishes for stainless steel enclosures are 2B, Grain and Orbital. Basically, the "2B" finish is a flat finishes containing no grain or pattern from the the steel processing plant. Often the "2B" finish looks adequate for most industrial stainless steel enclosures. Next, Grain is simply a straight line grain pattern that is brushed by the steel mill or can be obained in some metal fabrication shops. Typically, the factory grain pattern is more uniform and small grains. Some electrical panel shops prefer grain finished stainless enclosures. Orbital finish is simply a circular brushed finish and it great for most industrial enclosures. Nemaco Technology offers all the three basic surface finishes and other surface finishes.

Stainless Steel Cross Contamination

The elements of chrome and nickel provide stainless steel great corrosion resistance to oxidation. But also, stainless steel can be contaminated by using carbon steel power tools and other tooling equipment. Skilled shops with proper quality control programs and knowledgable craftsman can prevent stainless steel contamination.

Nemaco Technology can offer stainless steel with no cross contamination or essentially none.

History of Stainless Steel - Interesting Info

Harry Brearley, who was born in Sheffield, England, in 1871, probably invented stainless steel. His father was a steel melter and through private study and night school he became an expert in the analysis of steel and its production. In 1908 Brearley was given the opportunity to set up the Brown Firth Laboratories, which was financed by the two leading Sheffield steel companies of the day. In 1912 Brearley was asked to help solve the problems being encountered by a small arms manufacturer, whereby the internal diameter of rifle barrels was eroding away too quickly because of the action of heating and discharge gases. Brearley was therefore looking for a steel with better resistance to erosion, not corrosion. As a line of investigation he decided to experiment with steels containing chromium, as these were known to have a higher melting point than ordinary steels. Using first the crucible process, and then more successfully an electric furnace, a number of different melts of 6 to 15% chromium with varying carbon contents were made. The first true stainless steel was melted on the 13th August 1913. It contained 0.24% carbon and 12.8% chromium. At this time Brearley was still trying to find a more wear-resistant steel, and in order to examine the grain structure of the steel he needed to etch (attack with acid) samples before examining them under the microscope. The etching re-agents he used were based on nitric acid, and he found that this new steel strongly resisted chemical attack. He then exposed samples to vinegar and other food acids such as lemon juice and found the same result. At the time, table cutlery was silver or nickel plated. Cutting knives were made of carbon steel, which had to thoroughly washed and dried after use, and even then rust stains would have to be rubbed off using carborundum stones. Brearley immediately saw how this new steel could revolutionise the cutlery industry but he had great difficulty convincing his more conservative employers. On his own initiative, he than had knives made at a local cutler's, R.F. Mosley. To begin with, Brearley referred to his invention as "rustless steel". It was Ernest Stuart, the cutlery manager of Mosley's who first referred to the new knives as "stainless" after, in experiments, he had failed to stain them with vinegar. "Corrosion resisting" steel would be really the better term, as ordinary stainless steels do suffer corrosion in the long term in hostile environments.

Other grades of Stainless Steel Invented

Most of the standard grades still in use today were invented in the period 1913 to 1935, in Britain, Germany, America and France. Once these standard grades became accepted, the emphasis changed to finding cheaper, mass-production methods, and popularising the use of stainless steel as a concept. This tended to stifle the development of new grades. However, after the Second World War, new grades with a better weight-to-strength ratio were required for jet aircraft, which led to the development of the precipitation hardening grades such as 17:4 PH. From the 1970s onwards the duplex stainless steels began to be developed. These have far greater corrosion resistance and strength than the grades developed in the 1920s and are really the future for the increasing use of stainless steel.

Also, Nemaco has listed the common benefits of stainless steel for enclosures and many other custom junction box and metal applications.

Benefits of Stainless Steel

Corrosion Resistance
Note this is one of the most important benefits of stainless steel. Lower alloyed grades resist corrosion in atmospheric and pure water environments, while high-alloyed grades can resist corrosion in most acids, alkaline solutions, and chlorine bearing environments, properties which are utilised in process plants. Many of Nemaco's customers are looking for good corrosion resistances for enclosures.

Fire & Heat Resistance
Special high chromium and nickel-alloyed grades resist scaling and retain strength at high temperatures.

Sanitary Hygiene
The easy cleaning ability of stainless makes it the first choice for strict hygiene conditions, such as hospitals, kitchens, abattoirs and other food processing plants.

Good Aesthetic Appearance
The bright, easily maintained surface of stainless steel provides a modern and attractive appearance.

Tough Stuff ...... Strength-to-Weight Ratio Advantage
The work-hardening property of austenitic grades, that results in a significant strengthening of the material from cold-working alone, and the high strength duplex grades, allow reduced material thickness over conventional grades, and therefore cost savings.

Ease of Fabrication
Modern steel-making techniques mean that stainless steel can be cut, welded, formed, machined, and fabricated as readily as traditional steels. This has become true for metal enclosure and car manufacturing.

Impact Resistance
The austenitic microstructure of the 300 series provides high toughness, from elevated temperatures to far below freezing, making these steels particularly suited to cryogenic applications.

Long Term Value - Good Investment
When the total life cycle costs are considered, stainless is often the least expensive material option.

Stainless Steel for Enclosures


Stainless Steels Grades Commonly Used for Enclosures and other applications

Stainless steel is not a single specific material - it is the name given to a group of corrosion-resistant steels containing a minimum of 11% chromium - varying additions of nickel, molybdenum, titanium, niobium and other elements may also be present. The mechanical properties and behaviour in service of each type of steel depends upon its composition and consequently a carefully considered choice of steel is vital.

There are five classes of stainless steel, namely Martensitic, Ferritic, Austenitic, Duplex and Precipitation Hardening:

The Martensitic types may be strengthened and hardened by heat treatment, in the same way as plain carbon steels, but the Ferritic steels, which in general have lower carbon and higher Chromium contents, do not respond in this way.

Martensitic and Ferritic steels are magnetic.

Ferritic stainless steels contain chromium usually in the range 11 to 18%. They are magnetic, have moderate corrosion resistance and are not susceptible to stress corrosion. Austenitic stainless steels contain nickel as well as chromium, and are sometimes referred to by the generic title 18/8, i.e. 18% chromium, 8% nickel, although the actual composition may vary widely from these figures. They are non-magnetic and cannot be hardened by heat treatment, although they strain harden rapidly when cold worked. All stainless steels except hardened Martensitic steels are ductile and therefore can be formed, but the Austenitic types are outstanding in this respect. They are also amongst the most highly corrosion-resistant materials available to the designer and engineer.

Duplex stainless steels combine the optimum properties of austenitic and ferritic types. They contain 18 - 26% chromium plus 4.5 to 6.5% nickel and have good resistance to stress corrosion cracking.

Precipitation hardening stainless steels may be martensitic, semi-austenitic or austenitic. They combine the heat treat ability of normal martensitic grades with the corrosion resistance of austenitics. They are available in bar form for the production of heavy duty engineering components.

Nemaco offers Stainless Steel Enclosures and Custom Metal Fabrication
Nemaco uses mostly 304 and 316 grades of stainless steel for enclosures. Nemaco can custom design an stainlesss steel per the customer's design specifications and material requirements. Call or send an email to Nemaco for your stainless steel enclosure or custom stainless steel junction boxes.

Note: Nemaco Technology, LLC has provided this information as courtesy to potential customers and engineering companies for basic conceptual information and applications. Customers should select enclosures and materials based on their particular application. All of the contents of this website is the property of Nemaco Technology, LLC. All rights reserved. The information is subject to change without notice.

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