Chemical Composition
| Element | Ni | Cr | Mo | Cu | Fe | ||
| % Range | 32–38 | 19–21 | 2–3 | 3–4 | Bal. | 13 | |
Mechanical Properties
- Tensile Strength: ≥620 MPa
- Yield Strength: ≥300 MPa
- Elongation: ≥40%
- Hardness: 150–200 HB (Annealed) 34
Corrosion Resistance
- Superior resistance to sulfuric acid, phosphoric acid, and chloride stress corrosion cracking 12.
- Ideal for mixed acid environments (e.g., nitric + sulfuric acids) 23.
Types of Nuts Produced with Alloy 20
- Hex Nuts (ISO 4032 / DIN 934)
- Flange Nuts (ISO 7040)
- Lock Nuts (DIN 985)
- Heavy-Duty Coupling Nuts (ANSI B18.2.2)
- Custom threads: UNC, UNF, Metric 24
Applications Across Industries
- Chemical Processing:
- Reactors, heat exchangers, and pipelines handling sulfuric acid or chlorinated solvents 12.
- Oil & Gas:
- Offshore platform fasteners, valve components, and pump shafts in corrosive marine environments 23.
- Pharmaceutical & Food:
- Hygienic fasteners for equipment exposed to acidic cleaning agents or sterilization 34.
- Waste Treatment:
- Scrubbers and ducting systems in flue gas desulfurization (FGD) plants
Alloy 20 nuts
- UNS N08020 fasteners
- Corrosion-resistant stainless steel nuts
- ASTM B463 hex nuts
- DIN 2.4660 fasteners
- Chemical industry alloy nuts
- High-performance coupling nuts
- Sulfuric acid-resistant fasteners
Why Choose Alloy 20 Nuts?
- Cost-Efficiency: Comparable corrosion resistance to nickel alloys (e.g., Hastelloy C-276) at lower costs 23.
- Weldability: Compatible with TIG, MIG, and plasma arc welding; post-weld heat treatment optional 34.
- “Alloy 20 Nuts: Chemical Industry Applications”).
- Explore Alloy 20 bolts for FGD systems”).
- Alloy 20 Hex Nuts in Offshore Platform Assembly”.
