Alloy 31 (UNS N08031), as an advanced iron-nickel-chromium-molybdenum-nitrogen super austenitic stainless steel, has become the preferred material in high chloride ion and strong acidic environments due to its top performance in resisting general corrosion, pitting corrosion and stress corrosion cracking (SCC). HT PIPE is a astm b625 uns n08031 plate supplier with 15+ export experience. Contact us for more information and quotes for free!
| Parameter | Specifications & Available Limits |
| Standard Specifications | ASTM B625, ASME SB625, DIN EN 10028-7 |
| Material Designations | UNS N08031, Alloy 31, Werkstoff 1.4562, Nicrofer 3127 hMo |
| Thickness Range | 0.5 mm to 50 mm (Custom thicknesses available up to 100 mm) |
| Width Options | 1000mm, 1219mm, 1500mm, 2000mm, 2500mm |
| Length Options | 2000mm, 2438mm, 3000mm, 6000mm, or customized lengths |
| Surface Finishes | 2B, No.1, No.4, BA, Hot Rolled, Cold Rolled, Solution Annealed & Descaled |
Why should you choose alloy 31 plate & Sheet?
Alloy 31 steel plate Extreme corrosion resistance
Its unique chromium-molybdenum-nitrogen-copper alloy formula (chromium 26-28%, molybdenum 6-7%, nitrogen 0.15-0.25%, copper 1.0-1.4%) gives the material a breakthrough protection capability. In a boiling concentrated sulfuric acid environment (concentration 93-98%), the annual corrosion rate is stable below 0.1 mm.
Facing high chloride ion conditions, the material has been verified by the NACE MR0177 standard to be completely resistant to stress corrosion cracking. The pitting equivalent index PREN value is as high as 50 or more, ensuring that no crevice corrosion will occur in long-term service in saturated salt water at 80 degrees Celsius.
incoloy alloy 31 Full life cycle economy
The alloy creates significant economic benefits by significantly extending the life of equipment. Compared with the Hastelloy C-276 solution, Alloy 31 can reduce the initial material cost by 55%, while extending the equipment replacement cycle from 5-8 years to more than 15 years.
alloy 31 sheet processing and manufacturing adaptability
The material has a rare balance of strong corrosion resistance and easy processing. During cold processing, the minimum bending radius of 2 times the plate thickness can be achieved, and the elongation of more than 40% effectively avoids forming cracking.
The welding process is compatible with conventional technology. After TIG welding with ERNiCrMo-11 welding wire, the corrosion resistance loss of the heat-affected zone is controlled within 5%, which is much lower than the typical value of more than 20% of competing products.
carpenter 31 steel Fault tolerance for extreme working conditions
In real industrial environments with fluctuating operating conditions, Alloy 31 demonstrates strong safety redundancy. When the instantaneous temperature rises to 150 degrees Celsius, the structural integrity is still maintained. When the pH value unexpectedly drops to a strong acid state of 0.5 or the chloride ion concentration suddenly soars, the material resists corrosion impact with a dynamically regenerated chromium-molybdenum passivation film.
ASTM B625 UNS N08031 Plate Sustainable value
From the perspective of the entire industry chain, the alloy contributes multiple environmental benefits. The 100% recyclable feature makes the recycling rate of nickel-chromium resources exceed 95%, and the carbon footprint of the production process per ton of material is 52% lower than that of titanium alloy, emitting only 8.2 tons of carbon dioxide. The design life of more than 30 years significantly reduces the frequency of equipment replacement and avoids industrial waste generated by frequent demolition and construction.
ASME SB 625 alloy 31 plate Material performance density advantage
Among materials of the same corrosion resistance grade, its strength-to-density ratio reaches 80.2. The value of the corrosion resistance cost ratio index of 9.8 means that the protection efficiency obtained per unit cost is increased by 55%.
