What is the meaning of sus201 stainless steel?

What is the meaning of sus201 stainless steel?

SUS201 is a Japanese industrial standard for an austenitic chromium-manganese-nickel stainless steel known for being a lower-cost alternative to other grades like 304. It offers good formability and durability but has lower corrosion resistance, making it suitable for applications in less harsh environments such as appliances, sinks, and decorative items. The "SUS" stands for Steel and Special Steel,, which is a Japanese designation for stainless steel.

 

What is the equivalent material of SUS201 stainless steel?

The direct equivalent material for SUS201 stainless steel varies by region and standard. In the US, it is designated as ASTM 201. In Europe, it is equivalent to X12CrMnNiN17-7-5 (1.4372) under the EN 10088-2 standard.

 

Chemical Composition Comparison (Typical Values)

Element	SUS201 (% by weight)
Carbon (C)	≤ 0.15
Manganese (Mn)	5.5 – 7.5
Phosphorus (P)	≤ 0.06
Sulfur (S)	≤ 0.03
Silicon (Si)	≤ 1.00
Chromium (Cr)	16.0 – 18.0
Nickel (Ni)	3.5 – 5.5
Nitrogen (N)	≤ 0.25

 

Mechanical Properties Comparison (Annealed Condition, 2B Finish)

Property	SUS201
Tensile Strength (MPa)	≥ 520
Yield Strength (MPa)	≥ 275
Elongation (%)	≥ 40
Hardness (HRB)	≤ 100
Density (g/cm³)	~7.90

 

201 Stainless Steel Physical Properties

Property	Value
Density, lb/in3	0.283
Modulus of Elasticity, psi	28.6 x 106
Coefficient of Thermal Expansion, 68-212˚F, /˚F	9.2 x 10-6
Thermal Conductivity, Btu/ft hr ˚F	9.4
Specific Heat, Btu/lb ˚F	0.12
Electrical Resistivity, Microohm-in	27.0

 

Corrosion Resistance
201 stainless steel is suitable for mild environments, such as indoor or dry conditions. In more aggressive settings, like those with moisture, saltwater, or acidic exposure, it may corrode. Common forms of corrosion include pitting, crevice corrosion, and surface rust. 201 stainless steel performs best in environments without significant chemical exposure.

 

Welding
201 stainless steel is generally easy to weld, but proper heat control is necessary to prevent warping or cracking. Filler materials similar to 201 or 304 stainless steel are commonly used. Excessive heat can reduce corrosion resistance, so managing heat input and cooling between passes is essential. Pre-weld cleaning is important to avoid contamination. Controlling welding parameters and heat input helps prevent hot cracking, ensuring weld quality.

 

Is 201 stainless steel magnetic?
201 Stainless Steel is not magnetic. 201 is an austenitic stainless steel and its internal structure is not magnetically conductive and therefore cannot be attracted to magnets. The main composition of 201 stainless steel includes iron, chromium and nickel, but due to its low iron content, it is not magnetic.

 

What is the temperature range for sus201 stainless steel?

The temperature range of SUS201 stainless steel depends on the processing technology: its annealing temperature range is 1010-1093℃ (1850-2000℉), and its hot working temperature range is 1149-1232℃ (2100-2250℉). Under continuous high-temperature exposure, its performance stability is not as good as that of high-nickel alloys, and its oxidation resistance temperature is about 840℃.

 

What is the difference between sus 201 and 304?
The main differences are that 304 stainless steel has higher nickel content, superior corrosion resistance, and better weldability, while 201 stainless steel is a cheaper alternative with higher manganese and nitrogen, making it stronger but less corrosion-resistant. Choose 304 for high-performance, food-grade, and outdoor applications, and 201 for lower-cost, indoor applications where corrosion is not a major concern.

 

What is the difference between ss201 and 316 stainless steel?

The main differences between SS 201 and 316 stainless steel are chemical composition, corrosion resistance, and cost. SS 201 has lower nickel and higher manganese, making it a cheaper, more cost-effective option for general indoor use, while SS 316 contains molybdenum and is significantly more expensive but offers superior corrosion resistance, especially in marine or chemical environments.

 

If you have any project needs for SUS201 stainless steel, please feel free to place an order. GNEE has a large inventory of popular products for you to choose from. It can be processed into various practical product forms, including plates, coils, pipes, bars, and wires. For detailed chemical composition and free samples, please contact our factory immediately. We offer competitive prices and excellent service.Email: sales@gneestainless.com