Nickel Alloy 31 Steel Sheet|Alloy 31 Steel Plate

Nickel Alloy 31 Steel Sheet|Alloy 31 Steel Plate

Alloy 31 Corrosion-Resistant Alloy Sheet,Alloy 31: UNS N08031 Nickel Alloy Sheet by Gangsteel

Gangsteel Group is a premier global supplier of Alloy 31, also known as Nicrofer 3127 hMo or UNS N08031, offering premium Alloy 31 sheet, Alloy 31 plate, Nicrofer 31 pipe, Nicrofer 31 round bar, and custom-fabricated components.

Alloy 31is a nickel-chromium-molybdenum alloy with nitrogen additions, designed for exceptional corrosion resistance in highly aggressive environments like nitric and mixed acids, ideal for chemical processing and pulp and paper industries.

 This guide explores the Nicrofer 31 composition, Alloy 31 material properties, applications, and why Gangsteel is your trusted source for Alloy 31 sheet, Nicrofer 31 plate, and round bar at competitive Nicrofer 31 price.

1. What is Alloy 31?

Alloy 31(UNS N08031), or Nicrofer 3127 hMo, is a high-alloy austenitic nickel-chromium-molybdenum alloy with nitrogen, developed for superior corrosion resistance in severe environments, including nitric acid, sulfuric acid, and chloride-rich conditions. With high molybdenum (6.0-7.0%) and nitrogen (0.15-0.25%), Alloy 31 material resists pitting, crevice corrosion, and stress corrosion cracking, making Alloy 31 sheet ideal for chemical reactors and flue gas desulfurization systems. It outperforms Alloy 28 in mixed acid environments due to higher chromium and nitrogen content.

How Does Alloy 31 Compare to Alloy 28?

Alloy 31(UNS N08031) offers superior resistance to nitric and mixed acids due to higher chromium (26.0-28.0%) and nitrogen, while Alloy 28 (UNS N08028) excels in phosphoric acid resistance due to higher copper. Alloy 31 sheet is preferred for flue gas desulfurization and nitric acid service.

2. Why Choose Gangsteel’s Alloy 31 Sheet?

1. Superior Corrosion Resistance: Alloy 31 material excels in nitric, sulfuric, and chloride-rich environments, surpassing Alloy 625 in specific acid conditions.
2. High-Temperature Stability: Maintains integrity up to 1000°F (538°C), ideal for Alloy 31 sheet in chemical processing.
3. Excellent Weldability: Ensures corrosion resistance in welded Alloy 31 sheet and pipe with minimal risk of intergranular corrosion.
4. Competitive Pricing: Nicrofer 31 price ranges from US $45-70 per kg (FOB), offering value for high-performance applications.
5. Global Supply: Gangsteel delivers Alloy 31 sheet, Nicrofer 31 plate, and round bar worldwide with EN 10204 3.1/3.2 certification.

3. Execution Standards for Alloy 31

Gangsteel’s Alloy 31 products comply with international standards:

1. ASTM B625: For Alloy 31 plate, sheet, and strip.
2. ASTM B622: For seamless Nicrofer 31 pipe and tubing.
3. ASTM B581: For Nicrofer 31 round bar.
4. ASME SB-625/SB-622: For corrosion-resistant applications.
5. DIN 1.4562: European standard for UNS N08031.

Note: Products are supplied with mill test certificates and tested per DNV, BV, or SGS standards, ensuring compliance with Nicrofer 31 chemical composition and Alloy 31 material properties.

4. Available Specifications and Product Categories

Gangsteel offers a comprehensive range of Alloy 31 products tailored to UNS N08031 specifications, with a focus on Alloy 31 sheet:

4.1 Specifications

1. Alloy 31 Sheet:
   • Thickness: 0.025mm to 4mm
   • Width: 500mm to 2000mm
   • Finish: Cold-rolled, solution-annealed
   • Applications: Flue gas desulfurization, chemical reactors
2. Alloy 31 Plate:
   • Thickness: 0.5mm to 50mm
   • Width: 1000mm to 2500mm
   • Length: 2000mm to 12000mm
   • Finish: Hot-rolled, solution-annealed, descaled
   • Applications: Heat exchangers, nitric acid service
3. Nicrofer 31 Pipe:
   • Types: Seamless, welded
   • Outer Diameter: 0.5” to 8” (12.7mm to 203.2mm)
   • Wall Thickness: Sch 5S to Sch 160
   • Length: Up to 12m
   • Applications: Chemical processing piping
4. Nicrofer 31 Round Bar:
   • Diameter: 6mm to 300mm
   • Length: Up to 6000mm
   • Finish: Hot-rolled, solution-annealed, centerless ground
   • Applications: Valves, pump shafts
5. Custom Components:
   • Types: Flanges, fittings, CNC-cut parts
   • Sizes: Per ASME B16.5 or custom tolerances (±0.05mm)
   • Applications: Chemical and pulp and paper systems

4.2 Product Categories

1. Flat Products: Alloy 31 sheet and plate for corrosion-resistant structures.
2. Tubular Products: Nicrofer 31 pipe for fluid transport in aggressive environments.
3. Bar Products: Nicrofer 31 round bar for machining into high-strength components.
4. Custom Fabrication: CNC-machined parts and welded fittings for tailored solutions.

Note: Custom sizes and finishes are available. Contact Gangsteel for bespoke Alloy 31 sheet solutions.

5. Composition of Nicrofer Alloy 31

The Nicrofer 31 chemical composition is optimized for corrosion resistance, as per ASTM B625:

Note: High molybdenum and nitrogen enhance Alloy 31 material’s resistance to pitting and crevice corrosion, making Alloy 31 sheet ideal for nitric acid service compared to Alloy C276.

6. Material Properties of Alloy 31

• Density: 8.1 g/cm³ (0.293 lb/in³), supporting lightweight Alloy 31 sheet designs.
• Melting Point: 1350-1370°C (2462-2498°F), suitable for high-temperature applications.
• Hardness: ~90 HRB (annealed), contributing to wear resistance.
• Thermal Conductivity: 12.0 W/m·K at 20°C, ideal for Alloy 31 sheet in heat exchangers.
• Corrosion Resistance: Exceptional resistance to nitric acid, mixed acids, and chlorides, surpassing Alloy 28 in mixed acid environments.
• Non-Magnetic: UNS N08031 is non-magnetic, ideal for sensitive applications.

7. Mechanical Properties of Alloy 31

The mechanical properties of Alloy 31 material ensure reliability for Alloy 31 sheet, Nicrofer 31 plate, and pipe, as per ASTM B625 (solution-annealed condition):

Note: Properties vary with heat treatment. For detailed mechanical properties of Alloy 31 sheet, contact Gangsteel for a datasheet.

8. Equivalent Materials and Standards

Alloy 31(UNS N08031) is comparable to other corrosion-resistant alloys:

Note: Alloy 31 sheet excels in nitric acid and flue gas desulfurization, offering advantages over Alloy 825 in mixed acid resistance.

9. Applications of Alloy 31 Sheet

1. Chemical Processing: Alloy 31 sheet for reactors and evaporators in nitric and mixed acid production, complementing Alloy C276.
2. Flue Gas Desulfurization: Nicrofer 31 plate for scrubber systems in power plants.
3. Pulp and Paper: Alloy 31 sheet for bleach plant equipment.
4. Oil and Gas: Nicrofer 31 pipe for sour gas and seawater applications.
5. Pharmaceuticals: Components leveraging Alloy 31 material’s resistance to chloride-induced corrosion.

Note: Alloy 31 is optimized for aggressive acid and chloride environments, offering advantages over Alloy 400 in nitric acid service.

10. Nicrofer Alloy 31 Price

• Alloy 31 Sheet: US $45-70 per kg (FOB), depending on thickness and order volume.
• Nicrofer 31 Plate: US $47-72 per kg (FOB), based on size and finish.
• Nicrofer 31 Round Bar: US $50-75 per kg (FOB), varying with diameter and finish.

Note: Nicrofer 31 price reflects its high molybdenum and nitrogen content, comparable to Alloy C276. Contact Gangsteel for precise quotes.

11. Unique Features of Alloy 31 Sheet

• Nitric Acid Resistance: High chromium and nitrogen outperform Alloy 690 in mixed acid environments, ideal for Alloy 31 sheet.
• Pitting and Crevice Corrosion Resistance: Superior to Alloy K500 in chloride-rich conditions.
• Weldability: Maintains corrosion resistance in welded structures, unlike Alloy X-750.
• Diverse Forms: Available as Alloy 31 sheet, Nicrofer 31 plate, pipe, round bar, and CNC-cut parts.

12. Frequently Asked Questions (FAQ)

1. What is the composition of Nicrofer 31?
   Nicrofer 31 chemical composition includes 30-32% nickel, 26-28% chromium, 6.0-7.0% molybdenum, and 0.15-0.25% nitrogen, optimized for Alloy 31 sheet corrosion resistance.
2. What is the Nicrofer 31 price?
   Ranges from US $45-75 per kg (FOB) for Alloy 31 sheet, Nicrofer 31 plate, or round bar. Contact Gangsteel for quotes.
3. Is UNS N08031 magnetic?
   UNS N08031 is non-magnetic, ideal for sensitive applications in chemical processing.
4. What are the applications of Alloy 31 sheet?
   Used in chemical processing, flue gas desulfurization, and pulp and paper for corrosion-resistant components.
5. How does Alloy 31 compare to Alloy 28?
   Alloy 31 excels in nitric and mixed acids, while Alloy 28 is better for phosphoric acid.
6. What standards govern Alloy 31 sheet?
   ASTM B625 and ASME SB-625, with UNS N08031 designation.
7. Can I get a mechanical properties datasheet for Alloy 31 material?
   Contact Gangsteel for a PDF detailing tensile, yield, and corrosion data for Alloy 31 sheet.

13. Why Gangsteel?

1. Competitive Pricing: Nicrofer 31 price at US $45-75 per kg (FOB) for Alloy 31 sheet, plate, pipe, and round bars.
2. Comprehensive Inventory: Wide range of Nicrofer 31 sheet, plate, pipe, round bar, and custom components.
3. Quality Assurance: EN 10204 3.1/3.2 MTCs and testing per DNV, BV, or SGS standards.
4. Global Delivery: Serving markets in Saudi Arabia, UAE, India, and Europe with efficient logistics.
5. Advanced Fabrication: CNC machining, solution annealing, and precision cutting for Alloy 31 sheet components.

14. Contact Gangsteel

For inquiries about Alloy 31, Alloy 31 sheet, Nicrofer 31 plate, Nicrofer 31 pipe, Nicrofer 31 round bar, or to request a quote for Nicrofer 31 price or a mechanical properties datasheet, contact Gangsteel Group’s sales team. Trust Gangsteel for high-quality Alloy 31 material tailored to your project’s needs, backed by expertise and reliability as leading Alloy 31 suppliers!