Alloy 31 Round Bars | UNS N08031 / W.Nr. 1.4562 Bars Manufacturer in India
Alloy 31 Round Bars are premium-quality nickel-based alloy bars designed for applications where extreme corrosion resistance, strength, and reliability are essential. Known globally as UNS N08031 and W.Nr. 1.4562, Alloy 31 is widely used in chemical processing, marine systems, oil & gas plants, and pollution control equipment.
We manufacture and supply Alloy 31 round bars in multiple sizes, finishes, and conditions, ensuring long service life and consistent performance in aggressive environments.
What is Alloy 31?
Alloy 31 is a high-alloy nickel–iron–chromium–molybdenum material developed to withstand highly corrosive media, including sulphuric acid, phosphoric acid, and chloride-rich solutions. Its chemistry provides excellent resistance to:
- Pitting corrosion
- Crevice corrosion
- Stress corrosion cracking
- Oxidizing and reducing acids
Because of these properties, UNS N08031 Alloy 31 steel round bar is often chosen where standard stainless steels fail.
Key Features of Alloy 31 Round Bars
- Outstanding resistance to sulfuric and phosphoric acids
- Excellent performance in chloride environments
- High mechanical strength with good ductility
- Easy fabrication and weldability
- Long operational life with low maintenance
Alloy 31 vs EN 31 Round Bar – Understanding the Difference
Many users search for both Alloy 31 round bars and EN 31 Round Bar, but these are entirely different materials with different applications.
EN 31 Steel (Bearing Grade)
- EN 31 Round Bar
- DIN 100Cr6 Bright Bar
- EN 31 Steel Bright Bar
- Steel EN 31 Forged Bar
- EN 31 Alloy Steel Flat Bar
EN 31 is a high-carbon chromium steel, mainly used in:
- Bearings
- Automotive shafts
- Rollers and mechanical components
Alloy 31 (Nickel Alloy)
- Superior corrosion resistance
- Used in chemical, marine, and acid-handling industries
- Designed for harsh environments
We supply both Alloy 31 and EN 31 round bars, and our technical team helps customers select the correct grade for their application.
Alloy 31 Round Bar – Specifications
The following table gives a clear overview of the technical specifications of Alloy 31 / UNS N08031 / W.Nr. 1.4562 bars:
| Parameter | Details |
| Material Grade | Alloy 31 |
| UNS Number | N08031 |
| Werkstoff No. | 1.4562 |
| Product Form | Round Bar, Forged Bar, Bright Bar |
| Standards | ASTM, ASME, DIN, EN |
| Diameter Range | 6 mm to 500 mm |
| Length | Random / Cut to Length |
| Surface Finish | Bright, Black, Polished |
| Condition | Annealed, Hot Rolled, Cold Drawn, Forged |
| Manufacturing Process | Hot Rolled, Forged, Cold Drawn |
| Testing | Chemical, Mechanical, UT, PMI |
Alloy 31 Chemical Composition Chart (UNS N08031)
| Element | Percentage (%) |
| Nickel (Ni) | Balance |
| Chromium (Cr) | 26.0 – 28.0 |
| Iron (Fe) | 31.0 – 35.0 |
| Molybdenum (Mo) | 6.0 – 7.0 |
| Nitrogen (N) | 0.15 – 0.25 |
| Carbon (C) | Max 0.015 |
| Manganese (Mn) | Max 2.00 |
| Silicon (Si) | Max 0.50 |
| Sulfur (S) | Max 0.010 |
This composition allows Alloy 31 round bars to perform reliably in both high-temperature and highly corrosive environments.
Mechanical Properties of Alloy 31 Round Bars
| Property | Value |
| Tensile Strength | ≥ 650 MPa |
| Yield Strength (0.2% Offset) | ≥ 300 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 220 HB |
| Density | ~8.1 g/cm³ |
Applications of Alloy 31 Round Bars
Alloy 31 is commonly used in:
- Chemical processing plants
- Oil & gas refineries
- Desalination units
- Heat exchangers
- Pollution control systems
- Marine and offshore structures
Why Choose Us for Alloy 31 Round Bars?
- Proven industry experience
- Consistent quality and certified materials
- Ready stock for fast delivery
- Competitive pricing
- Technical guidance from material experts
Our focus is always on delivering value, safety, and long-term reliability.
Alloy 31 Round Bars (UNS N08031 / W.Nr. 1.4562), Alloy 31 Pipe & Alloy 31 Round Bars are the ideal choice for industries facing aggressive corrosion and demanding operating conditions. With excellent chemical stability, strong mechanical properties, and versatile supply options, Alloy 31 continues to be one of the most trusted nickel alloys worldwide.
Along with Alloy 31, we also support requirements for EN 31 Round Bar, DIN 100Cr6 Bright Bar, and EN 31 Steel Bright Bar, ensuring a complete and reliable product range.
Global Reach
ASC LLP boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality Alloy 31 Round Bars. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.
Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.
