Alloy 31 - UNS N08031, EN 1.4562 Fasteners

If you work in tough environments with strong chemicals or salty conditions, you need fasteners that won’t rust, crack, or wear out. That’s why Alloy 31 fasteners are the right choice. They give you much better protection than regular stainless steel. Whether you're dealing with acids, seawater, or heat, UNS N08031 or DIN 1.4562 fasteners keep your systems safe and strong without frequent replacements or repairs.

At Dalloyed, we provide high-quality Alloy 31 (Sanicro 3127 hMo) fasteners that meet your exact needs. You can get bolts, nuts, washers, studs, and more—made to handle tough jobs. Our UNS N08031, WNR 1.4562, and EN 1.4562 fasteners are strong, corrosion-resistant, and easy to install. We test every product carefully so you get fasteners that last longer and work better under pressure.

Nimonic 31Fasteners or Alloy 31Fasteners are available. Inquire Now

Dalloyed supplies these fasteners as per ASTM, ASME, DIN, UNS, WNR, and EN standards. We ship to many countries, including India, Saudi Arabia, UAE, Germany, and the USA. These places often need strong fasteners for chemical plants, oil rigs, marine areas, and industrial use. If you want fasteners that you can trust in any condition, Alloy 31 from Dalloyed is the solution.

DIN 1.4562 Bolts, Nuts, Washers & Studs – In Stock Now!

You can trust Alloy 31 fasteners in both extreme cold and elevated heat:

• Cryogenic down to –196 °C: Maintains ≥ 140 J/cm² impact toughness at –196 °C.
• Continuous service to 550 °C (1,022 °F): VdTÜV-certified for pressure vessels up to 550 °C; strength holds until ~550 °C, above which creep resistance gradually declines.
• Melting range: 1,330 – 1,370 °C.

At room temperature, you typically see

Alloy 31 Fastener Forms & Applications

You can choose Alloy 31 fasteners in a wide range of standard forms:

• Alloy 31 Bolts
• Alloy 31 Nuts (hex, lock, wing)
• Alloy 31 Washers (plain, spring, special)
• Alloy 31 Stud bolts and threaded rods
• Custom Alloy 31 forgings (like flanges and fittings)

These fasteners work well in many tough industries and uses, including:

• Chemical & Petrochemical: Pumps, heat exchangers, acid tanks
• Oil & Gas: Sour-gas pipelines, flue gas scrubbers
• Marine & Offshore: Seawater equipment, desalination systems
• Power Generation: Pollution scrubbers, heat exchangers
• Pharma & Food: Corrosive piping and tank internals

How Alloy 31 Compares to Other Alloys

Compared to 316L or 904L stainless steel, Alloy 31 delivers:

• Up to 5× higher pitting resistance in chloride media
• Double the molybdenum content vs. 316L (6–7% vs. ~2–3%), boosting acid resistance
• Improved creep-rupture strength at 500 °C and above

Against nickel-base alloys (e.g., 625), Alloy 31 offers similar localized corrosion resistance at lower cost, thanks to its optimized Ni, Cr, Mo and N balance.

Superaustenitic Alloy 31 (UNS N08031, EN 1.456) fasteners engineered for ultimate corrosion resistance in chemical, marine, and oil & gas applications. Certified to ASTM and ASME standards, our hex bolts, nuts, washers, and studs deliver reliability from –196 °C to 550 °C. Request a quote today!

Applicable Standards for Alloy 31 (UNS N08031 / DIN 1.4562) Fasteners

• Certified to International Standards: Alloy 28 fasteners meet industry codes for Europe, America, and beyond, including EN, ASTM, DIN, and ISO norms.
• Global Shipping: Major Indian manufacturers and stockists are experienced exporters, supporting clients in the USA, Germany, Japan, Middle East, Africa, Europe, and Southeast Asia.
• Traceability and Compliance: Quality assurance, third-party inspections, and full documentation ensure your project’s global compliance.

UNS N08031 / WNR 1.4562 Fasteners – Ready for Fast Shipping from Dalloyed.

ASTM / ASME Material Standards

• ASTM B581 / ASME SB-581: Nickel-Chromium-Iron-Molybdenum-Copper alloy rod
• ASTM B649 / ASME SB-649: Low-carbon Ni-Fe-Cr-Mo-Cu-N alloys including UNS N08031, N08925, N08034, N08354, N08926 (bar and wire)
• ASTM B564 / ASME SB-564: Nickel alloy forgings
• ASTM B462 / ASME SB-462: Forged/rolled pipe flanges, fittings, and valve parts for high-temp corrosive service – includes UNS N08031

ASME Fastener Standards

• ASME B18.31.2: Fasteners used in flanged joint assemblies
• ASME B18.31.1M: Metric dimensional standards for screws, bolts, and nuts
• NACE Standard NACE MR0175 / ISO 15156: Defines material requirements for resistance to sulfide stress corrosion cracking in H₂S environments – crucial for oil & gas applications

UNS N08031 / WNR 1.4562 Fasteners – Ready for Fast Shipping from Dalloyed.

Alloy 31 fasteners are one of the best choices when you need high strength and top-level corrosion resistance. They work well in extreme conditions, from freezing cold to 550°C, and have a high PREN value of 52—meaning they resist rust and chemical damage better than many other materials. These fasteners are trusted in the world’s toughest environments and help keep your systems safe and strong.

They follow major global standards like ASTM, ASME, DIN, and ISO, so you can use them almost anywhere without worry. At every step—from forging and heat treatment to final inspection—they’re made with care to ensure top quality and reliability.

If you’re an engineer working in chemical plants, oil and gas, marine systems, or power plants, Alloy 31 fasteners give you strength, safety, and long-term value. Whether you're replacing failed fasteners or building something new, Alloy 31 is a smart investment that helps you avoid future breakdowns and costly repairs.

Superaustenitic Alloy 31 Bolts & Nuts – Global Supplier

Looking for Alloy 31 (Sanicro 3127 hMo) fasteners? Enjoy exceptional pitting, crevice, and stress-corrosion cracking resistance with PREN ≈ 52. Ideal for chemical plants, offshore rigs, and power generation. ISO, NACE, PED certified—international shipping available.