UNS N08031 Seamles Nickel Alloy Steel Tube
UNS N08031 Seamles Nickel Alloy Steel Tube are high-performance nickel-based alloy tubes known for their exceptional corrosion resistance, strength and durability in demanding environments. ① STANDARD: ASTM B622/ ASTM B829 ...② OD RANGE : 6-257 MM③ THICKNESS RANGE: 1-35 MM
UNS N08031/1.4562/Alloy31/X1NiCrMoCu32-28-7 Chemical Composition
| Ni | Cr | C | Mn | Si | Cu | Mo | N | P | S | Fe |
| 30.00-32.00 | 26.00-28.00 |
≤0.015 |
≤2.00 |
≤0.030 |
1.00-1.40 | 6.00-7.00 | 0.15-0.25 |
≤0.020 |
≤0.010 |
Bal |
PREN = (Cr% + 3.3Mo% + 16N%) ≥ 48
UNS N08031/1.4562/Alloy31/X1NiCrMoCu32-28-7 Mechanical Properties
|
Hardness |
≤220HB |
|
Yield strength Rp ≥ N/mm² |
≥276 |
|
Tensile strength Rm N/mm² |
≥650 |
|
Elongation A5 ≥ % |
≥40 |
the ASTM B622 Nickel alloy seamless tube and pipe tolerance
UNS N08031/1.4562/Alloy31/X1NiCrMoCu32-28-7 Applications
• Flue gas cleaning systems: inland and marine scrubbers
• Pulp and paper industry: bleaching equipment
• Oil and Gas applications
• Chemical industries
Standard
| Seamless Tube | ASTM B622 |
| Welded Tube | ASTM B619 B626 |
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UNS N08031/1.4562/Alloy31/X1NiCrMoCu32-28-7 Material Summary
Alloy 31 is a nickel, chromium and molybdenum stainless steel with nitrogen and copper additions. It combines moderate tensile strength and high ductility with excellent corrosion resistance in sulfuric acid, reducing and oxidizing media and has strong resistance to corrosion and erosion corrosion in phosphoric environment.
Typically the alloy has PREN of ≥ 48, which ensure that the resistance to pitting corrosion is high.
Alloy 31 has excellent resistance to localized corrosion in halide media, both pitting and crevice corrosion. It also provides:
•
Outstanding resistance to sulfuric acid.
• Excellent resistance to phosphoric acid.
• Good resistance to nitric and nitric/ hydrofluoric acid mixtures.
• Excellent resistance to chlorine dioxide media in the pulp and paper
industry.
• Excellent resistance to both oxidizing and reducing media.
• Good resistance to stress corrosion cracking.
• Excellent resistance to general and localized corrosion in Chloridoxid bleaching plants in paper production
• Certification to ISO 15156/MR 0175 to level VI for sour gas applications in the oil and gas industry
• Excellent corrosion resistance in alkaline and acid halide media
• Approval for pressure vessels with operating temperatures from -196 to 550C
• Good processability and weldability
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