UNS N08031 Alloy Steel Sheet | UNS N08031 Strip

UNS N08031 Alloy Steel Plate Supplier | Specifications, Equivalent Materials, and Price

UNS N08031 alloy steel plate, also known as Alloy 31, is supplied by Gangsteel, a leading stainless steel supplier in China. Renowned for its exceptional UNS N08031 corrosion resistance in phosphoric, sulfuric, and nitric acids, this super-austenitic stainless steel is ideal for chemical processing, fertilizer production, and oil/gas applications.

Gangsteel offers UNS N08031 plate, sheet, bar, and custom components, meeting ASTM B709 and ASME SB-709 standards. This page provides detailed insights into the UNS N08031 chemical composition, mechanical properties, equivalent materials, specifications, applications, and competitive UNS N08031 price per kg. Explore our nickel alloy steel grades for related alloys like UNS N06625, UNS N08825, and UNS N08020.

1. What is UNS N08031?

UNS N08031is a super-austenitic stainless steel with high nickel (30.0-32.0%), chromium (26.0-28.0%), molybdenum (3.0-4.0%), and copper (0.6-1.4%), designed for superior corrosion resistance in aggressive acid environments, including pitting, crevice corrosion, and stress-corrosion cracking (SCC). Its low carbon content and nitrogen addition enhance strength and stability, making UNS N08031 material ideal for welded structures in phosphoric acid plants, chemical reactors, and offshore oil/gas equipment. Compared to UNS N08825, UNS N08031 offers higher pitting resistance equivalent number (PREN ≥48), making it better for severe acid conditions.

Gangsteel’s UNS N08031 alloy steel plate is tailored for highly corrosive industrial applications, providing a robust alternative to nickel alloy steel grades like UNS N10675 and UNS N06985.

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2. UNS N08031 Chemical Composition

The UNS N08031 chemical composition, compliant with ASTM B709, is optimized for corrosion resistance in acidic environments, with nitrogen for added strength.

Note: The high chromium and molybdenum content, with nitrogen, enhance UNS N08031 corrosion resistance in phosphoric and sulfuric acids, outperforming UNS N08020 in pitting resistance (PREN ≥48).

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3. UNS N08031 Mechanical Properties

The UNS N08031 mechanical properties, tested per ASTM B709, offer high strength and ductility, making UNS N08031 alloy steel plate suitable for chemical and oil/gas applications.

Note: Solution annealing at 1100-1180°C (2012-2156°F) optimizes Alloy 31 mechanical properties. Contact Gangsteel for a detailed UNS N08031 technical data sheet.

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4. UNS N08031 Allowable Stress

The allowable stress values for UNS N08031, per ASME BPVC Section II, Part D, ensure safe design in corrosive applications.

Note: These values ensure UNS N08031 material performs reliably in chemical processing equipment under elevated temperatures.

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5. UNS N08031 Equivalent Materials

UNS N08031aligns with international standards for global compatibility.

Note: UNS N08031 equivalent grades comply with ASTM B709, offering interchangeability with UNS N08028 in less demanding acid environments.

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6. UNS N08031 vs UNS N08825, UNS N06625, and SS316

Comparing UNS N08031 to UNS N08825, UNS N06625, and SS316 aids in material selection:

• UNS N08031 vs UNS N08825: UNS N08031 offers higher pitting resistance (PREN ~48) for phosphoric/sulfuric acids, while UNS N08825 is better for general acid resistance in oil/gas.
• UNS N08031 vs UNS N06625: UNS N06625 excels in high-temperature and broad acid resistance, while UNS N08031 is cost-effective for phosphoric/nitric acids.
• UNS N08031 vs SS316: UNS N08031 outperforms SS316 in severe acid environments but is more expensive.

Conclusion: Choose UNS N08031 alloy steel plate for phosphoric and sulfuric acid applications, UNS N08825 for oil/gas, UNS N06625 for high-temperature uses, or SS316 for general corrosion resistance.

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7. UNS N08031 Specifications

Gangsteel offers UNS N08028 alloy steel plate, sheet, bar, and custom components with a wide range of specifications:

7.1 Plate and Sheet

• Thickness: 0.5 mm to 100 mm (plate), 0.1 mm to 6 mm (sheet)
• Width: 1000 mm to 3000 mm
• Length: 2000 mm to 12000 mm (or coiled for sheet)
• Surface Finish: Hot-rolled, cold-rolled, annealed, pickled, 2B, No.1, or customized
• Standards: ASTM B709, ASME SB-709
• Applications: UNS N08031 plate for chemical reactors, Alloy 31 sheet for heat exchangers

7.2 Bar

• Diameter: 6 mm to 500 mm
• Length: Up to 12000 mm
• Finish: Hot-rolled, cold-drawn, centerless ground
• Standards: ASTM B709, ASME SB-709 (for rod/bar forms, per similar standards)
• Applications: UNS N08031 bar for fittings and fasteners

7.3 Custom Components

• Types: Flanges (ASME B16.5), fittings, CNC-machined parts
• Tolerances: ±0.05 mm for precision components
• Applications: Tailored solutions for chemical and fertilizer industries

Note: Custom sizes and heat treatments (e.g., annealing at 1100-1180°C) are available. Contact Gangsteel for bespoke UNS N08031 material specifications.

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8. UNS N08031 Applications

UNS N08031is a versatile material for industries facing severe corrosion challenges. Key UNS N08031 applications include:

• Chemical Processing: UNS N08031 alloy steel plate for reactors and heat exchangers in phosphoric and sulfuric acids.
• Fertilizer Production: Alloy 31 plate for equipment in aggressive acid environments.
• Oil and Gas: UNS N08031 bar for fittings in corrosive offshore platforms.
• Pulp and Paper: UNS N08031 sheet for bleach plant components (linked to a related alloy for pulp applications).
• Pharmaceutical: Components for high-purity systems.

Note: Compared to UNS N08028, UNS N08031 offers slightly higher pitting resistance for more severe acid environments.

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9. UNS N08031 Price per KG

The UNS N08031 price per kg ranges from USD 25-40 per kg (FOB), influenced by:

• Alloy Content: High chromium (26.0-28.0%) and molybdenum (3.0-4.0%) increase costs compared to UNS N08020.
• Market Demand: High demand in chemical and fertilizer industries drives Alloy 31 price.
• Product Form: UNS N08031 alloy steel plate may cost more than sheet due to processing.
• Global Supply Chain: Freight and availability affect UNS N08031 cost.

For precise UNS N08031 price per kg quotes or bulk discounts, contact Gangsteel.

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10. Related Alloy Steel Grades

Gangsteel offers a diverse range of nickel alloy steel grades alongside UNS N08031, suitable for complementary applications:

• UNS N06625: High strength for aerospace and nuclear applications.
• UNS N08825: Corrosion resistance for oil and gas.
• UNS N08020: Cost-effective for sulfuric acid applications.
• UNS N08028: Corrosion resistance for chemical processing.
• UNS N10675: Superior resistance to hydrochloric acid.
• UNS N06035: Superior resistance to phosphoric and nitric acids.
• UNS N06030: Superior resistance to phosphoric acid.
• UNS N06200: Superior resistance to sulfuric acid.
• UNS N10276: Broad resistance to reducing and oxidizing acids.
• UNS N06022: Superior resistance to oxidizing acids.
• UNS N06690: Corrosion resistance for nuclear applications.
• UNS N07718: High strength for aerospace.
• UNS N07750: Creep resistance for springs.
• UNS N06002: High-temperature strength for turbines.
• UNS N06075: Cost-effective for high-temperature aerospace uses.
• UNS N07080: High strength for aerospace and gas turbines.
• UNS N07263: Weldable for gas turbine applications.
• UNS N09901: High strength for aerospace components.
• UNS N08810: Oxidation resistance for industrial furnaces.
• UNS N06059: Excellent corrosion resistance for chemical industries.
• UNS R20033: Corrosion resistance for aggressive environments.
• UNS K93600: Low thermal expansion for precision components.
• UNS N08904: Corrosion resistance for chemical and marine applications.
• UNS S31254: High corrosion resistance for seawater applications.
• UNS N04400: Corrosion resistance for marine environments.
• UNS N05500: High strength for marine applications.

Note: These alloys complement UNS N08031 alloy steel plate in chemical, oil/gas, and high-temperature applications. Contact Gangsteel for a full catalog.

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11. Why Choose Gangsteel?

• Quality Assurance: All UNS N08031 alloy steel plate products meet ASTM B709 and ASME SB-709 standards, with EN 10204 3.1/3.2 certificates.
• Fast Delivery: Standard orders shipped in 7-15 days, with expedited options for urgent projects.
• Customization: Precision cutting (CNC, laser, waterjet), welding, and heat treatments tailored to your needs.
• Global Supply: Serving clients in Saudi Arabia, UAE, India, Europe, and beyond.
• Extensive Inventory: Wide range of nickel alloy steel grades, including UNS N06625 and UNS N08020.

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12. Conclusion

UNS N08031 alloy steel platefrom Gangsteel is a reliable choice for severe acid environments in chemical and fertilizer industries, where corrosion resistance is paramount. With its high chromium and molybdenum content, UNS N08031 material delivers the durability needed for reactors and heat exchangers, outperforming UNS N08825 in pitting resistance. Available in versatile specifications (0.5-100 mm thickness, up to 3000 mm width) and equivalent grades (W.Nr. 1.4562, EN X1NiCrMoCu32-28-7), it’s backed by Gangsteel, a trusted stainless steel supplier in China, at competitive prices (USD 25-40/kg).

Contact Gangsteeltoday for the latest UNS N08031 price per kg or to request a detailed Alloy 31 technical data sheet. Browse our nickel alloy steel grades for customized solutions to meet your project demands!