When a global refinery faced shutdowns from aggressive acid and seawater attack, the game-changer wasn’t thicker stainless it was Alloy 31 Sheets. The upgrade led not just to longer uptime, but measurable lifecycle cost savings across chemical plants, marine lines, and power stations proving Alloy 31 as the go-to sheet for engineers and procurement teams who demand more. That’s why Aurico Alloys LLP delivers certified Alloy 31 Sheets to the world’s most demanding applications, where ordinary alloys fail to resist both acids and chlorides.
Table of Contents:
Alloy 31 (UNS N08031, DIN 1.4562) is a super-austenitic alloy bridging the gap between high-alloy stainless steels and expensive nickel alloys. Its potent mix of 30–32% nickel, 26–28% chromium, 6–7% molybdenum, plus copper and nitrogen, gives it robust resistance against sulfuric, phosphoric, and hydrochloric acids even in chloride and mixed-acid systems where 904L, Alloy 20, and others struggle.
Supplied by Aurico Alloys LLP as per ASTM B625, Alloy 31 Sheets are available hot/cold rolled, annealed, pickled, or polished; with full mill certificates and complete traceability. From urgent shutdown replacements to major OEM projects, teams trust Aurico’s stock, logistics, and technical support for assurance in every supply.
When reliability, long-term cost, and process uptime matter, Alloy 31 Sheets from Aurico provide unmatched value and performance, beating generic stainless and mid-range nickel grades every time.
High-quality Alloy 31 Sheets ready for industrial use.
Specification Overview
| Supplier & Manufacturer | Aurico Alloys LLP |
|---|---|
| Grade | Alloy 31 (UNS N08031, DIN 1.4562) |
| Standards | ASTM B625, ASME SB625 |
| Thickness Range | 0.2 mm – 4.75 mm |
| Width / Size | 1000 × 2000 mm, 1220 × 2440 mm, 1500 × 3000 mm, 2000 × 2000 mm, 2000 × 4000 mm, custom |
| Finish | Hot rolled, cold rolled, 2B, 2D, BA, Satin, pickled, polished, plastic coated |
| Product Forms | Sheets, plates, coils, strips, foils, blanks, circles, rings, shims |
| Hardness | Soft, semi-hard, hard, spring hard |
Equivalent Grades & Standards
| Property | Value |
|---|---|
| UNS number | N08031 |
| Werkstoff / EN number | 1.4562 |
| EN designation | X1NiCrMoCu32-28-7 |
| Density | 8.05 g/cm3 |
| Melting range | 1330-1370 °C |
| Modulus of elasticity (20 °C) | 198 GPa |
| Thermal conductivity (20 °C) | 11.7 W/m·K |
| Electrical resistivity (20 °C) | 104 µΩ·cm |
| Coefficient of expansion (100 °C) | 14.3 µm/m·°C |
| Magnetic permeability (relative - at 20 °C) | 1.001 |
| Plate, sheet and strip specification | ASTM B625 |
Identifiers and physical constants for Alloy 31. A dash means no such designation is published for this grade.
Stock & Product Availability
Aurico Alloys LLP supplies Alloy 31 Sheets in all the most demanded thicknesses and dimensions, ready for prompt delivery worldwide. Bulk plate, custom bills of material, and urgent small-run jobs are all supported for fast-moving marine, energy, and industrial projects.
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | 30.0 | 32.0 |
| Chromium (Cr) | 26.0 | 28.0 |
| Iron (Fe) | — | Balance |
| Sulfur (S) | — | 0.010 |
| Silicon (Si) | — | 0.3 |
| Manganese (Mn) | — | 2.0 |
| Phosphorus (P) | — | 0.020 |
| Molybdenum (Mo) | 6.0 | 7.0 |
| Copper (Cu) | 1.0 | 1.4 |
| Nitrogen (N) | 0.15 | 0.25 |
| Carbon (C) | — | 0.015 |
Composition limits for Alloy 31. These are specification limits for the grade, not measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength (MPa) | 650–850 |
| Yield Strength (0.2% MPa) | 280–350 |
| Elongation (%) | ≥40 |
| Hardness (HB) | ≤230 |
| Modulus of Elasticity (GPa) | 195 |
| Service Temp (°C) | -196 to 550 (Pressure vessels -196 to 550°C) |
| Impact Strength (J/cm² at 20°C) | >185 |
| Impact Strength (J/cm² at -196°C) | >140 |
Applications & Benefits
- Chemical: reactors, acid piping, phosphoric/sulfuric systems, FGD, ore digestion, fertilizers, bleach plants
- Oil & Gas: heat exchangers, flowlines, downhole tubes, sour gas, separators, refinery equipment
- Marine: desalination, seawater piping, pump housings, exhaust scrubbers, ship systems
- Pharma: mixing tanks, ultra-clean lines, sterilization, high-purity piping, reactors
- Power: condensers, turbines, heat exchangers, emission reduction and FGD equipment
- OEMs & hardware: code-stamped pressure vessels, custom fabrication, urgent spares
FAQ & Insights
Global Export Destinations
We ship worldwide from Mumbai. See every destination we export to on our export markets page.
Domestic Supply Network
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Conclusion
Aurico Alloys LLP’s Alloy 31 Sheets deliver unrivaled corrosion resistance, mechanical toughness, and trusted certification for chemical, oil & gas, marine, pharma, and power. Isn’t it time you specified high-performance Alloy 31 Sheets from the supplier committed to your plant safety and reliability?