SAPH370 steel is a low-carbon steel with relatively simple composition, mainly composed of carbon, silicon and manganese. Other elements such as phosphorus, sulfur and aluminum may also be present in small amounts. This steel is produced by hot rolling and is usually supplied in sheet and coil form.

SAPH370 steel is known for its high strength and excellent fatigue and impact resistance. It is also highly formable and weldable, making it suitable for complex shapes and assemblies. Due to its good mechanical properties and easy formability, SAPH370 steel is widely used in the manufacture of auto parts, such as wheels, frames and other structural parts.

What are the characteristics of SAPH370 steel?

SAPH370 steel is a hot-rolled steel for structural use in the Japanese JIS G3113 standard. It is a commercial high-grade steel with a tensile strength of 370 MPa and a yield strength of 215 MPa.

The composition of SAPH370 steel includes elements such as carbon, silicon, manganese, phosphorus and sulfur. It has good formability and can be easily formed into complex shapes without cracking or tearing. The steel is also highly weldable and can be welded using a variety of methods such as gas metal arc welding, resistance welding and spot welding.

SAPH370 steel is known for its high strength and excellent fatigue and impact resistance. It also has good dimensional stability and uniformity, making it suitable for high-precision parts.

What is the chemical composition of SAPH370 steel?

According to JIS G3113 standard, the chemical composition of SAPH370 steel is:

Carbon (C): 0.15% max

Silicon (Si): 0.60% max

Manganese (Mn): 1.50% max

Phosphorus (P): 0.030% max

Sulfur (S): 0.025% max

Aluminum (Al): 0.010% minimum

Other elements such as nitrogen, chromium and copper may also be present, but their maximum levels are not specified in the standard.

The chemical composition of SAPH370 steel gives it good strength, ductility and formability, making it suitable for automotive components and other structural applications. The carbon content provides the necessary strength, while the silicon and manganese content contribute to the steel’s ability to form complex shapes without cracking or tearing. The presence of aluminum helps to increase the oxidation and corrosion resistance of steel. Low levels of phosphorus and sulfur help improve the weldability of the steel and reduce the risk of brittle fractures.

What are the physical properties of SAPH370 steel?

APH370 steel has good mechanical properties including high strength, good ductility and excellent formability. The following physical properties of SAPH370 steel:

Density: SAPH370 steel has a density of approximately 7.85 g/cm³.

Melting point: SAPH370 steel has a melting point of approximately 1,510°C.

Thermal conductivity: The thermal conductivity of SAPH370 steel is relatively low at about 46.6 W/mK.

Electrical conductivity: The electrical conductivity of SAPH370 steel is also relatively low, around 16.3MS/m.

Magnetic: SAPH370 steel is magnetic, which allows it to be used in certain electrical and magnetic applications.

Hardness: The hardness of SAPH370 steel will vary depending on the heat treatment process used. It is usually in the range of 70-90 HRB (Rockwell hardness B scale).

Modulus of elasticity: The modulus of elasticity of SAPH370 steel is approximately 210 GPa.

What are the mechanical properties of SAPH370 steel?

The high tensile strength and good elongation of SAPH370 steel make it ideal for use in automotive components and other structural applications requiring high strength and good formability. SAPH370 steel also has a relatively high yield strength, which means it resists deformation under load. The specific mechanical properties of SAPH370 steel are as follows:

Tensile strength: 370 MPa (minimum)

Yield strength: 215 MPa (minimum)

Elongation: 36% (minimum)

In addition to these mechanical properties, SAPH370 steel also exhibits good fatigue and impact resistance, which makes it suitable for components subjected to cyclic loads or impacts.

What is the heat treatment of SAPH370 steel?

SAPH370 steel is usually supplied in as-rolled condition. Heat treatment of SAPH370 steel consists of carburizing at 950-1050°C followed by controlled rolling to obtain the required mechanical properties. Carburizing is the process of heating steel in a carbon-rich atmosphere to enhance the diffusion of carbon into the steel surface. This increases the hardness and strength of the surface layer while maintaining the ductility of the core. Controlled rolling is performed at temperatures below the recrystallization temperature to improve dimensional accuracy and uniformity while maintaining mechanical properties.

Generally speaking, the heat treatment of SAPH370 steel is limited, and the properties of the material are mainly determined by the chemical composition and hot rolling process.

What should be paid attention to when welding SAPH370 steel?

SAPH370 steel has good weldability and can be welded by a variety of welding techniques, including arc welding, gas welding, resistance welding and laser welding. However, as with any steel, proper welding procedures must be followed to ensure good weld quality and avoid any potential problems.

Some important considerations for welding SAPH370 steel include:

Preheating: Preheating may be required to reduce the risk of cracking and improve weld quality. The preheat temperature should be selected according to the thickness of the material and the specific welding process used.

Welding parameters: Welding parameters such as welding current, voltage and travel speed should be optimized to ensure good penetration and good welding results.

Post-weld heat treatment: Depending on the application and the specific welding procedure used, post-weld heat treatment may be required to relieve residual stress and improve the mechanical properties of the weld.

Welding Consumables: Choosing the right welding consumables, such as filler metal and flux, is also important to ensure good weld quality.

Machinability of SAPH370 Steel

SAPH370 steel has excellent machinability and is ideal for applications producing parts that must have tight tolerances and a high degree of surface finish. This steel can be machined using conventional or CNC methods and can be machined to a variety of surface finishes. When machining SAPH370 steel it is important to use the correct cutting tools and operating conditions to avoid damage to the material.

What are the applications of SAPH370 steel?

SAPH370 steel is a kind of automobile structural steel, and the tensile strength of SAPH370 steel is 370-500MPa. Yield strength is 235 to 375 MPa. The high strength, good formability, and excellent fatigue and impact resistance of SAPH370 steel make it ideal for the manufacture of various automotive components. SAPH370 steel is widely used in the automotive industry for passenger cars and commercial vehicles. For example SAPH370 steel is suitable for automotive body panels, control arms, suspension systems and other structural parts. In addition, SAPH370 steel can also be used to produce non-structural parts such as door panels and seat backs.

SAPH370 steel from SO LUCKY is an excellent choice for a wide range of applications, especially in the automotive industry. This low-alloy steel has high strength, durability and impact resistance, making it ideal for a variety of automotive components such as frames, wheels and suspension systems. SAPH370 steel also has high corrosion resistance and good weldability, making it easy to machine and suitable for a variety of welding applications. Our SAPH370 steel is produced to the highest quality standards and is available in a variety of thicknesses and sizes to suit the specific needs of our customers. Whether you are looking for a reliable material for automotive components or other industrial applications, our SAPH370 steel is the perfect choice. Trust us to provide quality steel that meets your needs and exceeds your expectations.