S31803 plate with balanced austenite and ferrite microstructure, it complies with ASTM A240, UNS S31803, EN 1.4462 standards. It combines high strength, corrosion resistance and weldability, suitable for harsh industrial environments.
Chemical Composition of S31803 material
- C: ≤0.030%
- Cr: 21.0–23.0%
- Ni: 4.5–6.5%
- Mo: 2.5–3.5%
- N: 0.08–0.20%
- Mn: ≤2.0%
- Si: ≤1.0%
- P: ≤0.030%
- S: ≤0.020%
Mechanical Properties of S31803 material
- Tensile Strength: ≥620 MPa
- Yield Strength: ≥450 MPa
- Elongation: ≥25%
- Hardness: ≤HB 290
- Density: ~7.8 g/cm³
Key Advantages of stainless steel S31803 Plate
High Strength: Yield strength is about twice that of 304 and 316L stainless steel. It reduces material thickness and project cost under load-bearing conditions.
Corrosion Resistance: Resists chloride stress corrosion cracking, pitting corrosion and crevice corrosion. Suitable for seawater, chemical media and oilfield environments. PREN value ≥35.
Weldability & Formability: Suitable for cutting, bending, welding and machining. Stable performance after processing.
Long Service Life: Reduces maintenance and replacement frequency. Improves equipment reliability and lowers lifecycle cost.
Specifications of S31803 Plate
Thickness: 0.5–100 mm
Width: 1000, 1250, 1500, 2000, 2500 mm
Length: 2000, 2500, 3000, 6000 mm
Surface: 2B, BA, No.1, brushed, polished
Type: Cold rolled plate, hot rolled plate, cut-to-size plate
Industry Applications of S31803 Plate
Oil & Gas Industry
Used in pipelines, separators, heat exchangers, offshore platforms. Resists H₂S, CO₂ and chloride corrosion.
Chemical Processing
Used in pressure vessels, storage tanks, reactors, heat exchangers. Suitable for acidic, alkaline and high-temperature media.
Marine & Desalination
Used in seawater pumps, desalination equipment, ship components. Stable in high-chloride environments.
Pulp & Paper Industry
Used in digesters, bleaching equipment, processing systems. Resists corrosive chemicals in pulp production.
Food & Pharmaceutical
Used in processing equipment, storage tanks. Meets hygiene and corrosion resistance requirements.
Power & Environmental Protection
Used in flue gas desulfurization systems, waste treatment equipment. Resists corrosion and high temperature.
Why Choose Our S31803 Plate?
- Full compliance with international standards: ASTM A240, EN 10088, etc.
- Complete specifications: cold rolled, hot rolled, custom cut available.
- Strict quality control: ultrasonic testing, hardness test, chemical analysis.
- Stable supply chain: fast delivery for small and large orders.
- Professional export service: documents, packaging and logistics support.
Purchase Guide for S31803 Plate
- Confirm required thickness, width, length and surface finish.
- Clarify application environment and performance requirements.
- Provide standard and certification requirements (Mill Test Certificate).
- Contact us for quotation, delivery time and payment terms.
- We accept customized cutting and processing.
Contact Us to Buy S31803 Plate
We supply high-quality S31803 plate with competitive price and reliable quality. Suitable for global industrial projects. Contact us now to get a quote and place your order.
