CR500LA is a low-alloy, high-strength cold-rolled steel sheet, commonly used in automobile manufacturing and other fields that require high strength and excellent formability. Its chemical composition usually includes elements such as carbon, silicon, manganese, phosphorus, sulfur, and chromium, as well as trace amounts of elements such as aluminum and titanium.

The strength of CR500LA steel plate is usually between 500-640 MPa, and it also has good formability and welding performance. In addition, it has high heat treatment stability and can maintain its mechanical properties at high temperatures.

In short, CR500LA is a low-alloy steel material with high strength and excellent formability, which is often used in automobile manufacturing, construction machinery and other fields that require high strength and formability.

What is the chemical composition of CR500LA low alloy steel?

The chemical composition of CR500LA low alloy steel generally includes the following elements (weight percent):

Carbon (C): 0.12% – 0.18%

Silicon (Si): 0.15% – 0.50%

Manganese (Mn): 1.40% – 1.80%

Phosphorus (P): no more than 0.025%

Sulfur (S): no more than 0.010%

Chromium (Cr): no more than 0.30%

Aluminum (Al): 0.01% – 0.06%

Titanium (Ti): 0.01% – 0.10%

What are the physical and mechanical properties of CR500LA low alloy steel?

Physical properties:

Density: 7.85 g/cm³

Melting point: about 1,510°C

Mechanical behavior:

Yield strength: min. 500 MPa

Tensile strength: 590 MPa minimum

Elongation: 17% minimum

Reduction of area: min. 35%

Impact toughness: 20 J minimum (at -20°C)

Hardness: In the hot-rolled state, the hardness is usually between 170-210 HB; after heat treatment, the hardness can increase to between 200-240 HB.

What are the uses of CR500LA low alloy steel?

The high strength and formability of CR500LA low alloy steel make it widely used in many fields. The main uses include the following aspects:

Automobile manufacturing: CR500LA steel is usually used in the manufacture of automotive body and structural parts, such as doors, hoods, chassis, body frames, etc. Its high strength and excellent formability can improve the safety and energy saving of vehicles.

Construction machinery: CR500LA steel is also widely used in various construction machinery, such as excavators, cranes, loaders, etc. Its high strength can improve the load-bearing capacity and durability of the machine, while its formability can also provide greater flexibility in the design and manufacture of the machine.

Other fields: In addition to automobiles and construction machinery, CR500LA steel can also be used in other fields that require high strength and excellent formability, such as aerospace, shipbuilding, energy equipment, etc.

What is the heat treatment process of CR500LA low alloy steel?

The heat treatment process of CR500LA low alloy steel can adopt two ways of normalizing and quenching to adjust its structure and properties.

Normalizing treatment: heat CR500LA steel to a temperature of 800°C-900°C, keep it warm for a period of time (usually about 1 hour), and then slowly cool to room temperature. Normalizing can improve the toughness and machinability of steel, but it will reduce its hardness and strength.

CR500LA steel is quench treated by heating it to 860°C-890°C, keeping it warm for about an hour, and then rapidly cooling it with water or oil. Steel can be hardened and strengthened by quenching, but its toughness and machinability are reduced by quenching.

For the obtained organizational structure and properties to meet the required technical specifications, the heat treatment process should be adjusted according to the specific steel specifications and process requirements. During heat treatment, temperatures and cooling rates should be strictly controlled to prevent problems such as excessive deformation or cracking.

What is the corrosion resistance of CR500LA low alloy steel?

The corrosion resistance of CR500LA low-alloy steel is poorer than that of some stainless steels and corrosion-resistant alloys, but it still has certain corrosion resistance. Its main corrosion resistance properties are as follows:

Oxidation resistance: CR500LA steel has certain oxidation resistance, and can maintain a good surface state in high temperature and oxidative environments.

Atmospheric corrosion resistance: CR500LA steel has an oxide film on the surface, which can resist atmospheric corrosion to a certain extent, but it will still produce a certain degree of corrosion when exposed to humid or polluted environments for a long time.

Water corrosion resistance: CR500LA steel can resist the corrosion of tap water, fresh water and slightly acidic water at room temperature, but its corrosion resistance will be reduced in corrosive media such as salt water, acidic water and alkaline water.

What is the production process of CR500LA low alloy steel?

Raw material preparation: select high-quality pig iron, scrap steel, ferrochrome and other raw materials, and mix them according to a certain formula and ratio.

Smelting: put raw materials into blast furnace or electric arc furnace, remove impurities and non-metallic elements in raw materials through steelmaking process, and add a certain amount of alloying elements at the same time to control the chemical composition of steel.

Continuous casting: The melted steel is poured into the continuous casting machine, and the molten steel is rapidly cooled and solidified into a slab through the crystallizer and cooling water.

Hot rolling: The slab is fed into a hot rolling mill for heating and rolling to deform the slab into the desired thickness and width while adjusting its structure and properties.

Cold rolling: Send the hot-rolled plate into the cold rolling mill for processing and rolling to adjust its surface flatness and dimensional accuracy.

Heat treatment: Normalize or quench the cold-rolled sheet to adjust its structure and properties.

Inspection: Various physical and chemical performance tests are carried out on the finished product, such as hardness, tensile strength, impact toughness, chemical composition, etc.

Packaging and delivery: Packaging and packaging qualified finished products and storing them in the warehouse, waiting for sale or processing.

contact us

Our CR500LA steel products adopt the most advanced production technology and strict quality control, which ensures the high quality and stability of the products. This product has excellent mechanical properties and heat treatment properties, and can meet customers’ requirements for high strength, high hardness and high wear resistance of various parts. In addition, our CR500LA steel products also have good weldability and machinability, which is convenient for customers to carry out secondary processing and assembly.

If you are looking for high-quality CR500LA steel products and need high-quality pre-sales, sales and after-sales services, I believe that our company is your best choice. Warmly welcome you to come to consult, negotiate and cooperate!