Due to its unique properties, stainless steel is at the top of every list of food-safe metals used for food processing. The durability and easy cleanability of stainless steel surfaces and applications play major roles when it comes to food safety. As a food-grade equipment manufacturer, Donewright’s stainless steel fabrication helps ensure that your business meets the Australian standards for food premises and production equipment.

In today’s post, we’ll take a look at what stainless steel is, why it is so commonly used in the food production industry, and how you can protect and maintain your stainless steel surfaces and equipment. Let’s dive right in!

What makes stainless steel, stainless steel?

Stainless steel is a term used to describe corrosion resistant alloy steels with a minimum of 10.5 per cent chromium. It is made by melting together raw chromium, nickel, iron, silicon, molybdenum, and other metals. This creates a powerful material that is rust-resistant, durable and infinitely recyclable.

A passive oxide layer makes it resistant to corrosion and results in a shiny surface that is, unlike regular steel, near impossible to tarnish – hence the name “stainless” steel. Today, stainless steel is commonly used in kitchen appliances and the food production industry, including in cookware, dishware and utensils, as well as in surfaces, ceilings and walls.

Why is stainless steel perfect for food production?

Stainless steel is the superior choice for food production surfaces and equipment because it is resistant to temperatures up to 425 degrees Celsius before being ill-affected, which would melt, warp or break most plastics and other metals. It also maintains high strength at low thermal temperatures, even below cryogenic points. That means it’s perfect for use in industrial kitchens and in the food processing industry, where temperatures rarely exceed those marks.

Stainless steel is also able to resist corrosion caused by acids contained in meats, milk, fruits and vegetables, which makes it more durable. This property in combination with its resistance to chloride, make it easy to sanitise – a fact that is of utter importance in the food production industry. Stainless steel also does not affect the colour, taste or smell of the foods and beverages. Then again, stainless steel is reusable and 100 per cent recyclable, which makes it a very valuable material.

Types of stainless steel used in the food industry

Not all stainless steel is created equal. Depending on the levels of alloy ingredients we differentiate between two types of stainless steel in the food-grade stainless steel fabrication: 304 and 316 stainless steel.

• 304 stainless steel food grade metal

304-grade stainless steel contains up to 24 per cent chromium and 35 per cent nickel. It is the most commonly used material in kitchen appliances and food production environments because it offers great corrosion resistance at affordable prices. It is easy to sanitise as it withstands corrosion from mild chemicals and acids. But 304 stainless steel has a weakness: Powerful corrosives such as chloride and salt can damage stainless steel appliances and surfaces. If your business uses these types of chemicals, you might be better off investing in slightly more expensive 316 stainless steel.

• 316 food-grade stainless steel

316 stainless steel has very similar physical and mechanical properties to 304 but contains higher levels of molybdenum, which increases the steel’s ability to resist highly corrosive chemicals. This makes it suitable for most industrial applications that use strong chemicals or in coastal regions. 316 stainless steel might be a little more expensive than 304, but you’re likely to get more years of use out of these appliances.

Specialist equipment manufactured with stainless steel

Where are 304 and 316 stainless steel most commonly applied?

How to protect stainless steel

To ensure the longevity of stainless steel applications and appliances, proper care and maintenance are crucial. Corrosion is most often caused when the passive oxide layer is broken down with scrapes, scratches and chlorides. To prevent this, take note of the following cleaning methods!

Industrial cleaning should only involve:

• Steam and pressure cleaning
• Alkaline, alkaline chlorinated or non-chloride cleaners
• Non-abrasive tools, such as soft cloths and plastic scouring pads

Avoid:

• The use of hydrochloric acid (muriatic acid), hypochlorites (bleach) and other chemicals (nitric acid, iodine, ammonium) on stainless steel
• Scrubbing with abrasive scrubbers and materials

What about the use of aluminium in food production?

Aluminium is a commonly used food-grade metal as well. One of the most abundant metallic elements found on Earth, it occurs naturally in soil, water and air. That makes it a very cheap material to use. It also heats and cools very quickly, which is why it’s commonly used in cook and bakeware. However, the application of aluminium in food processing also presents a range of issues. Aluminium reacts to carbon and easily rusts and corrodes. Plus, it is a soft metal that easily scratches and breaks when too much force is applied.

Donewright’s food production services

At Donewright Stainless, we specialise in stainless steel food production fabrication, installation and maintenance. Our experts are equipped to create tailormade stainless steel solutions for the food, beverage and dairy industry. Our high-quality stainless steel fabrications are created to exceptionally high Australian standards. We offer efficient, expert workmanship across all projects, whether you require simple guide rails or are looking to transfer to a full conveyor process system.

Donewright Stainless provides food-grade stainless steel fabrications for the leading Australian food and beverage manufacturers, including Sunny Queen Farms, Tru Blue and Goodman Fielder. With our experience and expertise, the team at Donewright has you covered – no matter the type or size of your next project. For more information, to request a quote or ask a question, do not hesitate to reach out to us!

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When it comes to the food production industry, depending on what type of food you’re making and the ingredients used, you will always need materials that are durable and can handle the environment. However, some materials are better than others.

Stainless steel is the most commonly used steel in the food production industry for many reasons. But, how many of you actually know what stainless steel is made out of and the purpose it provides in the food production industry?

Here at Donewright Stainless, we are proud to offer stainless steel fabrication services for the food production industry.

In this article, we will discuss what stainless steel is, its benefits, and the other metal alternatives that can be used in the food production industry.

First of All – What Is Stainless Steel?

Stainless steel is a type of durable steel that’s made from the two ingredients of chromium and nickel. For the steel to be recognised as stainless, it needs to have 10.5% of chromium.

Also, for stainless steel to be considered ‘food grade’ or to be used in the food production industry, it should be fabricated from 300 and 400 steel. The 400 steel contains chromium, nickel and smaller amounts of other metals to make up the rest.

The most commonly used stainless steel grade in the food production industry is grade 304 (also known as 18-8) because it has 18% chromium and 8% nickel. Stainless steel is primarily used in the food production industry because of its corrosion resistance and other benefits, such as:

• Strength – Stainless steel’s strength retains at both very high and very low temperatures.
• Clean – Stainless steel is one of the most hygienic materials as bacteria, and other pathogens cannot grow on it because it is so easy to clean.
• Corrosion Resistance – Stainless steel is commonly used in the food production industry because it is resistant to corrosion and rusting.
• Durable – Even under heavyweight, stainless steel won’t buckle, making it one of the most durable metals out there.

Although stainless steel fabrication is most frequently used in the food production industry, there is the question of if there are any alternative metal solutions to stainless steel and what their benefits are.

Below, we will outline if there are any alternatives and what they are.

Food Safety Regulations (AUS ANZ)

Since stainless steel fabrication is one of the main components used in the food production industry, there are specific regulations that must be followed, such as:

Walls and ceilings should protect food from contamination and thus they should be enclosed to ensure no dust, dirt, or pests get inside. The Food Standards Guidebook states “wall surfaces in kitchens and other food processing areas must be finished with impervious materials, such as ceramic tiling, vinyl sheeting or stainless steel”. Stainless steel is ideal as it doesn’t absorb grease, food and water, making it easy to clean and hygienic in the long run.

Stainless Steel Applications In The Food Industry

There are many reasons why stainless steel is such a common material that is used in the food production industry and because of its large range of benefits. Stainless steel works well in high heat environments like kitchens and can withstand certain chemicals that other steels can’t handle. Stainless steel is a strong metal that doesn’t corrode easily, meaning it is durable and able to be kept properly sanitised and hygienic, which is a must in the food industry. It is also an affordable material considering its durability, making it a cost-effective way to follow health and regulations in the food industry.

Alternative Options

Although stainless steel is the most commonly used steel in the food production industry, there are a few more affordable alternatives that can be used, such as:

MILD STEEL/LOW CARBON STEEL

If you own a food production business where there is a lot of water contact, using carbon steel instead of stainless steel isn’t the right choice because it isn’t as water-resistant.

If you are thinking about using mild steel or low carbon steel for your business, one of the main positives about carbon steel compared to stainless steel is that it is a lot more affordable.

ALUMINIUM

Aluminium is an excellent alternative to stainless steel because it is more malleable, meaning that it can be used for more complex shapes as its elasticity ensures more flexibility.

While aluminium doesn’t rust; it is more likely to corrode easier however it is lighter in weight compared to stainless steel.

COATINGS/FINISHES

If you can’t afford food production industry-suitable metals, then coatings are an easy way to navigate this.

Below are some of the best coatings/finishes you can use in the food production industry:

1. Electropolishing – This polish is great but not for large scale projects. It is used more for frying baskets and other smaller kitchen items.

2. Antimicrobial Coatings – These help the resistance to corrosion, help harden the material, and make it more tolerant to heat. They are great for extending the life of metals and can also be put on stainless steel.

3. Polymer and Fluoropolymer – They are excellent coatings that can be used in harsh environments such as acids, and they are non-toxic.

4. Galvanised Sheet – This coating increases the longevity of the metal as well as its corrosion resistance.

5. Hot-dip Galvanising – Hot-dip galvanising improves the quality of the metal as it increases its resistance to environmental impacts and has a high maximum operating temperature of 665ºС

6. Colorbond Coating – This type of coating increases the lifespan of the metal and can handle hot temperatures.

7. Painted & Powder Coat – Both paint and powder coats increase the durability of any metal it comes into contact with. However, painted coats are still susceptible to chipping, so it would be better to go with powder coating.

If you are looking for quality steel fabrication services in Brisbane for your food or dairy production company, look no further than Donewright Stainless.

As leading steel fabrication specialists in Queensland, we provide metalwork and welding solutions to a range of clients across a variety of industries, including automotive, fire services and packaging. Committed to the highest standards of service and quality, you can rest assured your next project is in the best of hands.

From stainless and mild steel to aluminium fabrication, our efficient team provides reliable, tailormade solutions that stand the test of time. Whether you’re in need of pipework or handrails, Donewright Stainless has you covered. Need a specific grade or design of stainless steel applications for your production line? We can handle it for you.

Get things done ‘wright’: An Australian made and owned company, our qualified tradespeople perform any job professionally and with expertise. We’re happy to help, no matter the size or complexity of your project. If you’re after quality metal fabrication, contact the team today.

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