SUS305 Chemical Composition

Products Description SUS305 Chemical Composition SUS305 Physical Properties SUS305 Mechanical Properties Another important component is nickel (Ni). Nickel in SUS305 contributes to its ductility and toughness. It helps the steel to maintain its mechanical properties at different temperatures and...

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SUS305 Chemical Composition

Element	Content (%)
Iron, Fe	67
Chromium, Cr	18
Nickel, Ni	12
Manganese, Mn	≤ 2
Silicon, Si	≤ 1
Carbon, C	0.12
Phosphorous, P	0.045
Sulfur, S	0.030

SUS305 Physical Properties

Properties	Metric	Imperial
Density	8 g/cm³	0.289 lb/in³
Melting point	1454°C	2650°F

SUS305 Mechanical Properties

Properties	Metric	Imperial
Tensile strength, ultimate	585 MPa	84800 psi
Tensile strength, yield (@0.2%)	260 MPa	37700 psi
Modulus of elasticity	193 GPa	28000 ksi
Shear modulus	86 GPa	12500 ksi
Elongation at break (in 50 mm)	50	50
Hardness, Brinell	80	80
Hardness, Knoop (converted from Brinell hardness)	97	97
Hardness, Rockwell B (converted from Brinell hardness)	45	45
Hardness, Vickers (converted from Brinell hardness)	82	82

Another important component is nickel (Ni). Nickel in SUS305 contributes to its ductility and toughness. It helps the steel to maintain its mechanical properties at different temperatures and also improves its resistance to stress and cracking. The presence of nickel also enhances the overall formability of the material, allowing it to be easily shaped and processed into various forms and sizes. This is beneficial for manufacturing processes that require complex shapes or detailed designs.
In addition to chromium and nickel, SUS305 also contains other elements in smaller amounts. For example, it may contain small amounts of carbon (C), which, when properly controlled, can affect the strength and hardness of the steel. However, excessive carbon can lead to the formation of carbides, which may reduce the corrosion resistance in some cases. Therefore, the carbon content in SUS305 is carefully balanced to achieve the desired combination of properties.

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Manganese (Mn) may also be present in the chemical composition. Manganese can improve the solubility of nitrogen in the steel and contribute to its strength and toughness. It also helps in the deoxidation process during steelmaking.
Sulfur (S) and phosphorus (P) are usually present in very low amounts in SUS305 as impurities. These elements need to be controlled tightly because excessive amounts can have a negative impact on the mechanical properties and weldability of the steel.
Overall, the precise chemical composition of SUS305 is designed to provide a balance of corrosion resistance, ductility, toughness, and formability. Understanding its chemical composition is essential for manufacturers and engineers to select the right material for specific applications and to ensure the optimal performance and durability of the products made from SUS305. Whether it's used in the production of consumer goods or industrial equipment, the proper chemical composition of SUS305 plays a vital role in meeting the requirements of different industries.