You are here: Home » BLOG » Alloy Plates

Alloy Plates

Views: 3     Author: Wang     Publish Time: 2024-01-09      Origin: Site

wechat sharing button
whatsapp sharing button
linkedin sharing button
pinterest sharing button
facebook sharing button
sharethis sharing button

What is an alloy?

A metal alloy is a substance that combines more than one metal or mixes a metal with other non-metallic elements. For example, brass is an alloy of two metals: copper and zinc. Steel is an alloy of a metallic element (iron) and a small amount — up to 2% — of a non-metallic element (carbon). When compared to metals, alloys differ in their properties and characteristics, such as composition, applications, how they're made, and cost.

Steel is an alloy of carbon and iron. It is a popular alloy because of its low cost and higher tensile strength. However, many different types of steels consist of different amounts of carbon along with several other elements like manganese, phosphorus, sulfur, chromium, copper, nickel, and molybdenum. Primarily, the composition of iron is accounted for by iron, which is at least 75% of the total alloy’s weight. It also consists of different amounts of carbon and many other elements depending on the type of steel.

Alloy steel is a steel that is alloyed with various elements, usually with alloying element content between 1.0% and 50% by weight, in order to improve the mechanical properties of the steel. According to the different alloying elements, alloy steel can be divided into two categories: low alloy steel and high alloy steel.

A high alloy steel has alloying elements (not including carbon or iron) that make up more than 8% of its composition. It has a high percentage of alloying elements. The most common type of high alloy steel is stainless steel which contains up to 12% chromium. Chromium makes a thin oxide layer outside of the steel which is known as the latent layer. These alloys are less common, because most steel only dedicates a few percent to the additional elements. Stainless steel is the most popular high alloy, with at least 10.5% chromium by mass. This ratio gives stainless steel more corrosion resistance, with a coating of chromium oxide to slow down rusting.

Meanwhile, low alloy steel is only modified slightly with other elements, which provide subtle advantages in hardenability, strength, and free-machining. It has a lower percentage of alloying elements ranging from 1 to 5 percent. This steel has different strengths and applications depending on the alloy used. Besides, large-diameter flanges use this type of alloy to get specific mechanical properties. By lowering the carbon content to around 0.2%, the low alloy steel will retain its strength and boast improved formability.

alloy plates

What is an alloy steel plates?

The steel plate is flat, rectangular and can be rolled directly or cut from a wide strip of steel. According to the thickness of the steel plate, thin steel <4 mm (the thinest 0.2 mm), thick steel plate 4~60 mm, extra thick steel plate 60~115 mm. Steel plate is divided into hot rolled and cold rolled according to rolling. The width of the sheet is 500~1500 mm; The width of the thickness is 600~3000 mm. The sheet is divided into ordinary steel, high quality steel, alloy steel, spring steel, stainless steel, tool steel, heat-resistant steel, bearing steel, silicon steel and industrial pure iron sheet, etc. According to professional use, there are oil drum plate, enamel plate, bulletproof plate, etc.; According to the surface coating, there are galvanized sheet, tin sheet, lead sheet, plastic composite steel plate, etc.

The steel of thick plate is roughly the same as that of thin plate. In all aspects of the product, in addition to bridge steel plate, boiler steel plate, automobile manufacturing steel plate, pressure vessel steel plate and multi-layer high-pressure vessel steel plate and other varieties are pure thick plate, some kinds of steel plate such as automobile girder steel plate (thick 2.5~10 mm), pattern steel plate (thick 2.5~8 mm), stainless steel plate, heat-resistant steel plate and other varieties are crossed with thin plate.

Alloy steel plates are an essential component in many industrial applications, and JN Alloy is a leading manufacturer and supplier of high-quality alloy steel plates. Our plates are designed to meet the diverse needs of various industries and come in a wide range of grades to ensure that you get the right product for your specific application. One of the key features of our alloy steel plates is their excellent strength and durability. They can withstand high temperatures and pressure, making them suitable for use in harsh and demanding environments. Our alloy steel plates are also highly resistant to corrosion and wear and tear, ensuring long-lasting performance.

We offer a variety of alloy steel plate types, including low alloy, high strength, and corrosion-resistant alloys, all of which are suitable for use in a wide range of applications. Our plates are easily fabricated, making them ideal for use in various manufacturing processes.

Chemical composition of the alloy steel plates

Alloy steel plates is mixed with several alloying elements such as silicon, chromium, molybdenum, boron, vanadium, nickel, aluminum, etc. These alloying elements increase the strength, toughness, hardness, and wear resistance of the alloy steel. Some of the alloying elements and their effects are shown below.

Aluminum: It helps to get rid of sulfur, oxygen, and phosphorus.

Copper: It increases the resistance of corrosion and harness.

Chromium: It simply increases hardness, sternness, and wear resistance.

Manganese: It increases wear resistance, hardenability, ductility and helps to withstand high-temperature.

Silicon: It intensifies magnetism and strength.

Nickel: It increases oxidation resistance and durability.

Tungsten: It increases the hardness and toughness.

Vanadium: It adds to the strength and toughness of steel and offers shock resistance.

Mechanical properties of alloy steel plates

Alloy steels can contain a wide variety of elements, each of which can enhance various properties of the material, such as mechanical thermal and corrosion resistance. Elements added in low quantities of less than around 5 wt.% tend to improve mechanical properties, for example increasing hardenability and strength, whereas larger additions of up to 20 wt.% increase corrosion resistance and stability at high or low temperatures.

The alloying and processing methods for alloy plates depend on the desired result. The required combination of elements is first melted together in a furnace at over 1600°C for 8 to 12 hours. The steel is then annealed at over 500°C in order to remove impurities and to alter the physical and chemical properties . Next, the mill scale (a mixture of iron oxides), which results from the annealing process, is removed from the surface of the steel with hydrofluoric acid before repeating the annealing and descaling process. Finally, the steel is melted and cast for rolling and shaping into the final form.

Corrosion resistance is a critical mechanical property of steel alloys. Corrosion resistance describes a material’s ability to prevent natural chemical or electrochemical attack by the atmosphere, moisture, or other agents.  Corrosion takes many forms including pitting, galvanic reaction, stress corrosion, parting, inter-granular, and others. Corrosion resistance may be expressed as the maximum depth in mils (0.001 inches) to which corrosion would penetrate in one year. Some materials are intrinsically corrosion-resistant, while others benefit from the addition of plating or coatings.  Many metals that belong to families that resist corrosion are not totally safe from it and are still subject to the specific environmental conditions where they operate.

Ductility is another important mechanical property of steel alloys and refers to the ability of a material to deform plastically under tensile stress without fracturing. It is a critical property in applications that require the material to be formed or shaped. Steel alloys with high ductility can undergo significant plastic deformation before fracture, while those with low flexibility will fail suddenly without much deformation.

Use of the alloy steel plate


Steel alloys plates are widely used in construction due to their high strength and durability. They are used for buildings, bridges, and other infrastructure projects. They can withstand high loads and stresses, making them ideal for structural applications. It is also resistant to fire and corrosion, making them a popular choice for buildings in coastal or humid areas.


Alloy plates are widely used in the automotive world due to their high strength and durability. These produce car frames, engine components, suspension systems, and body parts. They offer excellent resistance to corrosion, which is a critical factor in automotive applications, where exposure to moisture and road salt can cause rusting. They are also cost-effective and be formed into different shapes and sizes.


Plates have extensive applications in the aerospace industry due to their high strength, toughness, and resistance to corrosion and heat. They are used in constructing aircraft frames, engine parts, landing gears, and other critical components. Alloys such as stainless steel and titanium are popular for aerospace applications as they are lightweight yet durable and can withstand high temperatures and pressures. Also, alloys plates can be processed to specific properties, making them suitable for different aerospace applications.


Steel plates are used in the energy industry, particularly in the production of oil and gas. Steel plates are used to create pipelines and storage tanks, which are crucial components in the transportation and storage of oil and gas.

In conclusion, steel plates are a versatile and indispensable material used in various industries. From construction to manufacturing, transportation to defense, energy to food and beverage, steel plates provide the necessary strength, durability, and versatility to meet the demands of each industry.

JN Alloy is a distributor and product manufacturer of stainless steel, duplex steel, and nickel.
Tel: +86 19339900211
Add: Stainless steel Market 289, Xinwu District , Wuxi, China
Copyright © Jiangsu Special Nickel Alloy Technology Co., Ltd. All Rights Reserved.                                                                                                                                                                                                              Technical Support : coverweb