UNS S31803 / S32205 round bar

Chanson Metals offers high-quality UNS S31803 round bars, a versatile duplex stainless steel alloy engineered for excellent strength, corrosion resistance, and reliability in demanding industrial environments. Known for its high chromium, molybdenum, and nitrogen content, UNS S31803 combines the benefits of both austenitic and ferritic stainless steels, providing superior mechanical strength and enhanced resistance to pitting, stress corrosion cracking, and general corrosion in a wide range of environments.

Chemical Composition and Mechanical Properties
UNS S31803, a duplex stainless steel, achieves a balanced structure of approximately equal parts of ferrite and austenite, providing a combination of the strength of ferritic alloys with the formability and corrosion resistance of austenitic steels. The chemical composition and high alloy content make it an ideal material for both structural and corrosive environments.

Chemical composition

Grade	UNS	Chemical Component %
		C	Mn	P	S	Si	Cr	Ni	Mo	N
	S31803	Max 0.03	Max 2.00	Max 0.03	Max 0.02	Max 1.00	21.0-23.0	4.50-6.50	2.50-3.50	0.08-0.20
2205	S32205	Max 0.03	Max 2.00	Max 0.03	Max 0.02	Max 1.00	22.0-23.0	4.50-6.50	3.00-3.50	0.14-0.20

Mechanical properties

Type	TENSILE STRENGTH (Mpa)	YIELD STRENGTH (Mpa)	ELONGATION(2INCH)	HARDNESS HB
UNS S31803	≥620	≥448	≥25	≥290
UNS S32205	≥655	≥450	≥25	≥290

Key Mechanical Properties
Tensile Strength: 620 MPa minimum
Yield Strength: 450 MPa minimum
Elongation: 25% minimum
Hardness (Brinell): Max 290 HB

Product Features and Advantages
Superior Corrosion Resistance: Provides exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking, making it suitable for harsh environments, including chloride-rich conditions.
High Strength: Higher yield strength and tensile strength compared to standard austenitic stainless steels, making it ideal for structural applications.
Balanced Microstructure: The duplex microstructure ensures good weldability, high resistance to fatigue, and overall durability.
Excellent Mechanical Properties: Superior strength-to-weight ratio and resistance to thermal degradation at elevated temperatures.

Standards and Equivalent Grades
UNS S31803 round bars meet international standards for quality and performance:

ASTM Standards: A276, A479
EN Standards: 1.4462
JIS Standards: SUS31803

Applications
UNS S31803 round bars are widely used in various industries where strength and corrosion resistance are critical:

Oil & Gas: Components exposed to high pressures, such as risers, valves, and piping systems in offshore and subsea environments.
Chemical Processing: Storage tanks, heat exchangers, and reactors, particularly for handling corrosive chemicals, acids, and seawater.
Marine Industry: Seawater piping systems, desalination plants, and offshore platforms.
Pulp & Paper: Equipment that is exposed to harsh chemical processing conditions, especially in bleaching and pulping stages.
Power Generation: Equipment used in power plants, including turbine components and heat exchangers.

Available Sizes and Specifications
Chanson Metals supplies UNS S31803 round bars in a wide range of diameters, from 5mm to 500mm, with custom lengths and finishes available to meet your specific requirements. Whether you need cold-finished, hot-rolled, or ground bars, we can provide products tailored to your needs.

Quality Assurance at Chanson Metals
Our UNS S31803 round bars undergo strict quality control measures, including chemical composition analysis, mechanical testing (such as tensile and hardness tests), and corrosion resistance assessments. Each batch is thoroughly inspected to ensure consistent quality and reliable performance in demanding applications.

For more details on UNS S31803 round bars or to request a quote, please contact our dedicated sales team. At Chanson Metals, we are committed to providing high-performance stainless steel solutions that meet the highest standards of quality and durability for your industrial needs.