What is SUS Material?
SUS is the Japanese standard for stainless steel materials. The Japanese stainless steel material standard is expressed as sus plus a number. Different numbers represent different types of stainless steel. The first letter s in the period indicates the meaning of steel, the second letter indicates the meaning of use, and the third letter indicates the meaning of stainless.
What is SUS304 Material?
SUS304 refers to 304 stainless steel.SUS is the Japanese material standard, 304 stainless steel is by the United States ASTM standard production out of the stainless steel grade.304 is equivalent to our country’s (0Cr18Ni9) stainless steel, Japan also cited the United States called, said: SUS304.
Due to the high content of nickel and austenitic single-phase organization at room temperature, it has a high corrosion resistance compared with Cr13 stainless steel, high plasticity and toughness at low, room, and high temperatures, as well as better cold forming and weldability.
Mechanical Properties of SUS Material
| Property\Material | SUS304 (Austenitic) | SUS316 (Austenitic) | SUS410 (Martensitic) | SUS420 (Martensitic) | SUS430 (Ferritic) |
|---|---|---|---|---|---|
| Ultimate Tensile Strength (UTS) | 520 – 720 MPa | 515 – 690 MPa | 440 – 650 MPa | 700 – 850 MPa | 450 – 600 MPa |
| Yield Strength (0.2% offset) | ≥ 205 MPa | ≥ 205 MPa | ≥ 275 MPa | ≥ 500 MPa | ≥ 275 MPa |
| Elongation | ≥ 40% | ≥ 40% | ≥ 20% | ≥ 20% | ≥ 22% |
| Hardness (HRB/HRC) | 70 – 90 HRB | 70 – 90 HRB | 20 – 40 HRC | 50 – 56 HRC | 70 – 80 HRB |
Ultimate Tensile Strength (UTS): The maximum stress a material can withstand before breaking under tension or strain.
Yield Strength: The stress point at which a material begins to deform plastically. Beyond this point, the material is permanently deformed.
Elongation: The ductility of a material, expressed as a percentage of its original length.
Hardness: The ability of a material to resist deformation, usually measured using Rockwell hardness (HRB/HRC).
What does Stainless Steel 370 and 470 Mean?
In the U.S. standard, 300 represents the austenitic series, 400 represents the martensitic series. 370/470 should be austenitic stainless steel is not commonly used, may be added some kind of rare metal elements.
Stainless steel designations, such as “370” and “470,” generally refer to the stainless steel family, specifically its composition and properties. However, these specific numbers (370 and 470) are not standard grades or designations of stainless steel according to recognized AISI (American Iron and Steel Institute) or ASTM (American Society for Testing and Materials) standards.
