What are the characteristics of GS 93005-2 DX52D+Z BMW standard galvanized coil

What is GS 93005-2 DX52D+Z steel?

GS 93005-2 DX52D+Z is a galvanized coil sheet conforming to the BMW automobile enterprise standard, and DX52D indicates a hot-dip galvanized steel sheet. "DX" indicates that the steel belongs to the type of galvanized steel, the number "52" indicates that its minimum yield strength is 520 MPa (MPa), and the letter "D" indicates that its design use is cold forming. "+Z" means galvanized with normal machined surface and no air knife shear.

Hot-dip galvanizing is a process in which steel is coated with a layer of zinc to improve corrosion resistance. GS 93005-2 DX52D+Z steel has high tensile strength and excellent corrosion resistance, and is widely used in construction, automobile manufacturing, electrical appliances, furniture and other fields, especially in environments requiring good corrosion resistance.

In conclusion, GS 93005-2 DX52D+Z indicates a hot-dip galvanized steel sheet under DIN specification, in which the hot-dip galvanized layer has undergone ordinary surface treatment.

Chemical Composition of GS 93005-2 DX52D+Z Steel

GS 93005-2 DX52D+Z is a hot-dip galvanized steel that is commonly used in the manufacture of building materials, auto parts, and home appliances, etc. The following is the typical chemical composition of GS 93005-2 DX52D+Z steel:

Carbon (C): 0.20% max

Manganese (Mn): 2.50% max

Phosphorus (P): 0.080% max

Sulfur (S): 0.015% max

Copper (Cu): 0.55% max

Chromium (Cr): 0.30% max

Zinc (Zn): 0.60% max

In addition, GS 93005-2 DX52D+Z steel may also contain trace amounts of other elements such as aluminum (Al), silicon (Si) and nitrogen (N), although their content is usually very low and negligible.

Mechanical properties of GS 93005-2 DX52D+Z steel

GS 93005-2 DX52D+Z is a grade of galvanized steel sheet commonly used in applications such as manufacturing construction materials and auto parts. The mechanical properties of this steel can be described by the following aspects:

Tensile Strength: The tensile strength of GS 93005-2 DX52D+Z steel is usually 360-420 MPa (MPa), indicating the ability of the material to resist tensile force under stress. 

Yield Strength: The yield strength of GS 93005-2 DX52D+Z steel is usually 300-350 MPa (MPa), which indicates the resistance of the material to plastic deformation. When the yield strength is exceeded, the material undergoes permanent deformation. 

Elongation (Elongation): The elongation of GS 93005-2 DX52D+Z steel is usually 22-26%, indicating the percentage that the material can stretch before tensile fracture. A higher elongation indicates a material with better ductility.

Bending Performance: GS 93005-2 DX52D+Z steel generally has good bending performance, and it is not easy to crack or break during cold bending and pressing.

Process of GS 93005-2 DX52D+Z steel

GS 93005-2 DX52D+Z steel is a hot-dip galvanized steel sheet that is often used in the manufacture of building materials, auto parts, etc. The following is a typical process of GS 93005-2 DX52D+Z steel:

Material preparation: Select cold-rolled steel coils of appropriate size and specifications as raw materials, and perform necessary cutting and leveling treatments.

Surface treatment: pre-treat the surface of the steel plate to remove oil and rust to ensure the surface is clean and improve the adhesion of the coating 

Preheating treatment: Send the steel plate into the preheating furnace for heating to eliminate internal stress and improve the plasticity of the plate.

Hot-dip galvanizing: The preheated steel plate is soaked in molten zinc solution, so that the surface of the steel plate reacts with zinc to form a galvanized layer. This can be done through a continuous galvanizing process or a batch galvanizing process.

a. Continuous galvanizing process: After pretreatment, the steel strip enters the continuous galvanizing line, and first passes through the hot-dip galvanizing tank, where it contacts with molten zinc liquid to form a zinc coating. Then after cooling, solidification and belt conveying steps, the galvanized steel sheet is finally obtained.

b. Batch galvanizing process: Put the pre-treated steel plate into a large container, then pour molten zinc solution and let it soak for a period of time to ensure that the surface is completely covered with zinc. After that, it is taken out from the zinc liquid, and processed through cooling, solidification and other steps to finally obtain a galvanized steel sheet.

Cooling and Treatment: After the galvanizing process is complete, the steel sheet needs to go through a cooling and treatment stage in order to bring it to the required mechanical properties and appearance quality.

Final processing: According to specific application requirements, final processing such as cutting, bending, punching, welding, etc. is performed on galvanized steel sheets to meet the needs of product design and manufacturing.

Corrosion Resistance of GS 93005-2 DX52D+Z Steel

GS 93005-2 DX52D+Z steel is hot-dip galvanized and has good corrosion resistance. The galvanized layer forms a protective layer on the surface of the steel plate, which effectively blocks the corrosion of the steel by air, moisture and other corrosive media, thereby prolonging the service life of the steel.

The following are the corrosion resistance advantages of GS 93005-2 DX52D+Z steel:

Anode protection: The galvanized layer is used as the anode to form a uniform and dense zinc layer on the surface of the steel plate, which has high anodic protection ability and can prevent the steel from being corroded.

Self-healing performance: When the galvanized layer is damaged, the surrounding zinc will migrate to the damaged area through the anodic protection effect, automatically repairing the galvanized layer, and avoiding further corrosion.

Atmospheric corrosion resistance: The galvanized layer of GS 93005-2 DX52D+Z steel can effectively resist corrosion caused by factors such as humidity, oxygen and carbon dioxide in the atmosphere, making the steel suitable for use in outdoor environments and harsh weather conditions.

Chemical corrosion resistance: The galvanized layer can provide a certain degree of corrosion resistance to chemical media such as acid, alkali and salt solution, making GS 93005-2 DX52D+Z steel widely used in chemical industry and other fields.

It should be noted that the corrosion resistance of the galvanized layer depends on factors such as the thickness, quality and surface condition of the galvanized layer. Avoid scratching or damaging the galvanized layer during use to maintain its good corrosion resistance.

Welding performance of GS 93005-2 DX52D+Z steel

GS 93005-2 DX52D+Z is a hot-dip galvanized steel whose weldability depends on its chemical composition and heat treatment state. Since you didn't give any more details, I'll give you the weldability of hot dip galvanized steel in general.

Hot-dip galvanized steel generally has good weldability, but certain problems can occur during welding, such as weld cracks, porosity and plating peeling. These problems are usually related to the fact that the melting point and coefficient of thermal expansion of the galvanized layer differ from the properties of the base material.

For the best welding results, here are some suggestions: 

Cleaning and preparation: Before welding, make sure the steel surface is clean and free of grease, dirt and rust. Use appropriate cleaning agents and tools for cleaning. 

Choose the right welding method: In general, hot-dip galvanized steel can be welded using common welding methods such as arc welding (MIG/MAG, TIG), resistance welding, etc. Depending on the specific requirements and application, a suitable welding method is selected.

Choose the right welding consumables: Choose welding consumables that are compatible with hot-dip galvanized steel to ensure the strength and corrosion resistance of the weld. 

Control welding parameters: Control parameters such as welding current, welding speed and welding temperature to ensure proper penetration and weld quality. Avoid excessively high soldering temperatures, which can cause plating peeling or annealing effects in the heat-affected zone.

Prevention of cold cracks: After welding is completed, proper cooling measures are performed to reduce the risk of cold cracks. Preheating and subsequent heat treatment can be used to mitigate cold cracking.

Application of GS 93005-2 DX52D+Z Steel

GS 93005-2 DX52D+Z is a material specification of hot-dip galvanized steel sheet, which has the following characteristics:

High Tensile Strength: GS 93005-2 DX52D+Z steel has high tensile strength and is suitable for applications requiring higher strength.

Good corrosion resistance: hot-dip galvanizing treatment makes GS 93005-2 DX52D+Z steel have good corrosion resistance, and can be used in harsh environmental conditions, such as outdoor construction, automobile manufacturing and ship construction, etc.

Excellent formability: GS 93005-2 DX52D+Z steel has good plasticity and deformation properties in forming processes such as cold bending and deep drawing, and is suitable for the manufacture of parts requiring complex shapes.

Based on the above characteristics, GS 93005-2 DX52D+Z steel is widely used in the following fields:

Construction industry: GS 93005-2 DX52D+Z steel is often used to make building structural components such as roofs, walls, roof trusses, and door and window frames, providing structural strength and durability.

Automobile manufacturing industry: GS 93005-2 DX52D+Z steel can be used in automobile body components, chassis and body frame, etc. to provide good strength and anti-corrosion performance.

Household appliance industry: GS 93005-2 DX52D+Z steel can be used to manufacture casings, panels and other parts of household appliances, making them have high strength and corrosion resistance. 

Machinery manufacturing: GS 93005-2 DX52D+Z steel can be used to manufacture structural components of various machinery and equipment, such as agricultural machinery, engineering machinery, etc.