Difference between Stainless Steel and Mild Steel

Steel is one of the most common materials in the world, representing an industry that produces 1.3 billion tons a year, and it is a material used throughout the construction of many architectural fabrications.

There are many sub-categories of steel and depending on the various qualities and characteristics of a particular build, the choice of steel selected may vary.

The properties that vary the most between steel types are strength, ductility, hardness, aesthetics, and cost. Depending on your scope of work, selecting the proper steel type for the job can benefit the quality of the project and cost.

Stainless steel:

It is defined as a steel alloy with a minimum of 11.5 wt% chromium content.Stainless steel pipe does not stain, corrode or rust as easily as ordinary steel (it “stains less”), but it is not stain-proof. It is also called corrosion resistant steel when the alloy type and grade are not detailed, particularly in the aviation industry. There are different grades and surface finishes of stainless steel to suit the environment to which the material will be subjected in its lifetime. Common uses of stainless steel are cutlery and watch straps.

Stainless steel differs from carbon steel by amount of chromium present. Carbon steel pipe rusts when exposed to air and moisture. This iron oxide film is active and accelerates corrosion by forming more iron oxide. Stainless steels have sufficient amount of chromium present so that a passive film of chromium oxide forms which prevents further corrosion.

Mild steels:

Carbon steel is sometimes referred to as ‘mild steel’ or ‘plain carbon steel’. The American Iron and Steel Institute defines a carbon steel as having no more than 2 % carbon and no other appreciable alloying element. Carbon steel makes up the largest part of steel production and is used in a vast range of applications.

Typically carbon steels are stiff and strong. They also exhibit ferromagnetism (i.e. they are magnetic). This means they are extensively used in motors and electrical appliances. Welding carbon steels with a carbon content greater than 0.3 % requires that special precautions be taken. However, welding carbon steel presents far fewer problems than welding stainless steels. The corrosion resistance of carbon steels is poor (i.e. they rust) and so they should not be used in a corrosive environment unless some form of protective coating is used.

What is the difference between steel and mild steel pipe?

Steel is less malleable and harder than mild steel.
Mild steel s less brittle than steel.
Steel is more resistant to corrosion.
Mild steel can be further strengthened through the addition of carbon.
The basic difference is that s/s has very little carbon and is alloyed with chromium, nickel, molybdenum and other elements to improve its mechanical and chemical properties.

So Why and Where do we use Mild Steel?

If you aren’t going to see the steel surface, i.e.: the final piece is going to be painted or coated.
If a piece requires a large volume of metal, where stainless isn’t cost effective.
If you need steel for structural components that are internal to the piece and not visible or effecting the overall visual concept.
If you are bending or welding the metal.

Generally speaking, Aluminum is also a great lightweight option, when weight-baring isn’t a factor. For larger projects requiring strength, steel is a much stronger option. Pearlite Steel is a leading stainless steel tube manufacturer and exporter from India, provides high quality stainless carbon steel pipe and tubing solutions around the globe. Contact us for more details.

Structural Steel Pipe Products

Seamless Steel Pipe.This seamless tubular product is used in such applications as dock piling,pipe piling, caissons, bollards and more. What is seamless steel pipe made from you ask. Well it's made from solid round steel ‘billet’ which is then heated and pushed or pulled over a form until the steel is shaped into a hollow tube. The same as our other structural pipe products seamless pipe can be supplied as a new or secondary pipe in various sizes, grades and thicknesses.

ERW Steel Pipe is typically known to the construction industry as a high quality line pipe which is commonly used by the oil and utility companies. ERW structural pipe is very flexible in the number of applications it can be used for, in such industries as sign pole manufacturing, columns, dock building for marinas, parking bollards, tunnel construction, caissons.

SSAW Steel Pipe an economical and very durable product, which in turn gives your project the long lasting reliability you require. Spiral welded steel pipe can be used in a wide variety of applications such as pump station piping, force mains, water treatment plant piping and trenches, not to mention pillars and piling. As you can see spirally welded tubing is a widely used structural pipe product. DSAW Carbon Steel Pipe known to some construction people as the straight seam pipe product, with the weld being visible on the inside and outside of the product. Depending on the application DSAW carbon steel pipe comes in many different grades such as ASTM grades and API grades. It is available as a new pipe product or a secondary pipe product. Some common projects it is used for is road casing, road boring, Culverts, offshore drilling...

Fence structural steel pipe Material is becoming very popular in building fences because of its durability and strength. Pipe fencing is regularly used on ranches and farms for horse fencing, and cattle pens The construction industry uses it for closing in parks, parking lots and more. Fence tubing is available in various sizes. 

Culvert Pipe is not a high quality grade pipe, it is a construction pipe mainly used in the construction of driveways, water and sewer systems, drainage systems and the construction of temporary river bridges. on culvert steel pipe..

Sell your new and used secondary grade pipe. There's a number of pipe purchasers that will buy your corrugated stainless steel pipe, ERW, DSAW steel pipe, culvert pipe, galvanized steel pipe and others. on selling your structural pipe.

What is Mild Steel?

In a recent video blog series, we reviewed the main types of steel available in today’s market (watch part 1 here). From carbon to alloy steel, tool steel to stainless steel, there are countless types, categories and grades of steel. Among these is mild steel pipe, a commonly used term describing a general type of steel. But exactly what is mild steel? To help define this term, this article will explain its properties, how it is made and also a few examples of common applications.

Mild Steel Properties

Mild steel is a type of carbon steel with a low amount of carbon – it is actually also known as “low carbon steel.” Although ranges vary depending on the source, the amount of carbon typically found in mild steel is 0.05% to 0.25% by weight, whereas higher carbon steels are typically described as having a carbon content from 0.30% to 2.0%. If any more carbon than that is added, the steel would be classified as cast iron. Mild steel is not an alloy steel and therefore does not contain large amounts of other elements besides iron; you will not find vast amounts of chromium, molybdenum, or other alloying elements in mild steel. Since its carbon and alloying element content are relatively low, there are several properties it has that differentiate it from higher carbon and alloy steels.

Less carbon means that mild steel is typically more ductile, machinable, and weldable than high carbon and other steels, however, it also means it is nearly impossible to harden and strengthen through heating and quenching. The low carbon content also means it has very little carbon and other alloying elements to block dislocations in its crystal structure, generally resulting in less tensile strength than high carbon and alloy steels. Mild steel also has a high amount iron and ferrite, making it magnetic.

The lack of alloying elements such as those found in stainless steels means that the iron in mild steel is subject to oxidation (rust) if not properly coated. But the negligible amount of alloying elements also helps mild steel pipe to be relatively affordable when compared with other steels. It is the affordability, weldability, and machinability that make it such a popular choice of steel for consumers.

How Mild Steel is Made

Mild steel is made similar to how other carbon steels are made. A common way this is done involves a combination of iron ore and coal. Once the coal and iron ore are extracted from the earth, they are melted together in a blast furnace. Once melted, the mixture is moved to another furnace to burn off any impurities that they may have, as well as to make any other adjustments to the mild steel’s chemical composition. Following that, the steel is allowed to solidify into a rectangular shape. This slab of mild steel is then usually brought down to the desired size using processes called hot rolling or cold drawing, although there are other methods that can also be used.

Common Applications of Mild Steel Pipe

Here are some examples of where it is used in the world:

• Structural steel pipe
• Signs
• Automobiles
• Furniture
• Decorations
• Wire
• Fencing
• Nails

API 5L LSAW Steel Pipe Project in South Africa

Project: API 5L LSAW Liquefied Natural Gas Line Pipe Project in South Africa
Standard: API 5L LSAW steel pipe
Specification: X46, X60 32" 10.5mm
Quantity: 12500T
Country: South Africa
Supplier:Hunan great steel pipe co.,ltd

Welding Steel Pipe

Welding pipe also called welded steel pipe is made of steel plate or steel strip through crimp forming thus welding. The length is 6 meters. Welding pipe production technology is simple, high production efficiency, variety specifications, less equipments investment while the strength is generally lower than seamless pipe.

With rapid development of high quality strip steel rolling production and improvement of welding and testing technology, welded pipe is gradually taking the place of seamless steel pipe in the most field. Due to increasing welded quality, the specifications of welded steel pipe are variety. Small diameter welding pipe uses straight seam welding, large diameter welded pipe uses spiral welding.

How is the Production Process of Welding Pipe?
The production technology of straight seam welded steel pipe is simple, high production efficiency, low cost and rapid development. The strength of spiral welding pipe is generally higher than straight seam welded steel pipe. Compared with the same length of straight seam pipe, welding seam increases by 30-100% and the production speed is much lower.

Larger diameter or thicker welding pipe is usually made by steel billet directly. While small or thin wall welding pipe only need to weld steel strip directly. Then through simple polishing and wire drawing, the welding pipe is fine.

More information,pls visit:Hunan great steel pipe co.,ltd

Production Processing of LSAW Steel Pipe

LSAW Steel Pipe Manufacturing Process

API Standard of LSAW Steel Pipe

LSAW steel pipe is referred to longitudinal submerged arc welded pipe which is made of hot rolled steel plate or coils. LSAW tube always goes to the big-sized diameter welded steel pipe, which can’t be processed by electric resistance welding technology. Furthermore, the mechanical properties of the LSAW pipe base metal and welded metal are tested and the results are in accordance with the corresponding pipe specification API SPEC 5L, which show that domestic LSAW steel pipe can be used for oil and gas pipelines.

More information,pls visit:Hunan great steel pipe co.,ltd