ASTM B408 Nickel-Iron-Chromium Alloy Rod and Bar
- Grade: UNS N08120, UNS N08800, UNS N08810, UNS N08811, and UNS N08890
- Round Bar Dia.: 5-300mm
- Bar Size: Width≤254mm x Thickness≥3.2mm
Features
ASTM B408 Nickel Alloy Rod and Bar
Chemical Composition (wt.%)
| Element | Alloy N08120 | Alloy N08800 | Alloy N08810 | Alloy N08811 | Alloy N08890 |
| Nickel | 35.0 – 39.0% | 30.0 – 35.0% | 30.0 – 35.0% | 30.0 – 35.0% | 40.0 – 45.0% |
| Chromium | 23.0 – 27.0% | 19.0 – 23.0% | 19.0 – 23.0% | 19.0 – 23.0% | 23.5 – 28.5% |
| Iron | Remainder | 39.5% min | 39.5% min | 39.5% min | Remainder |
| Manganese | 1.5% max | 1.5% max | 1.5% max | 1.5% max | 1.5% max |
| Carbon | 0.02 – 0.10% | 0.10% max | 0.05 – 0.10% | 0.06 – 0.10% | 0.06 – 0.14% |
| Copper | 0.50% max | 0.75% max | 0.75% max | 0.75% max | 0.75% max |
| Silicon | 1.0% max | 1.0% max | 1.0% max | 1.0% max | 1.0 – 2.0% |
| Sulfur | 0.03% max | 0.015% max | 0.015% max | 0.015% max | 0.015% max |
| Aluminum | 0.40% max | 0.15 – 0.60% | 0.15 – 0.60% | 0.25 – 0.60% | 0.05 – 0.60% |
| Titanium | 0.20% max | 0.15 – 0.60% | 0.15 – 0.60% | 0.25 – 0.60% | 0.15 – 0.60% |
| Molybdenum | 2.50% max | — | — | — | 1.0 – 2.0% |
| Niobium | 0.4 – 0.9% | — | — | — | 0.2 – 1.0% |
| Tantalum | — | — | — | — | 0.10 – 0.60% |
| Phosphorus | 0.040% max | 0.045% max | 0.045% max | 0.045% max | — |
| Tungsten | 2.50% max | — | — | — | — |
| Cobalt | 3.0% max | — | — | — | — |
| Nitrogen | 0.15 – 0.30% | — | — | — | — |
| Boron | 0.010% max | — | — | — | — |
Mechanical Properties
| Alloy Condition | Tensile Strength (psi) | Yield Strength (0.2% offset, psi) | Elongation (%) |
| UNS N08120 Cold-worked and annealed | 90,000 | 40,000 | 30 |
| UNS N08800 Hot-worked, as-hot-worked | 80,000 | 35,000 | 25 |
| UNS N08800 Cold-worked and annealed | 75,000 | 30,000 | 30 |
| UNS N08810 and UNS N08811 Cold-worked and annealed | 65,000 | 25,000 | 30 |
| UNS N08890 Cold-worked and annealed | 75,000 | 30,000 | 35 |
Technical Specifications
| Specification | Value |
| Standard | ASTM B408 Nickel Alloy Rod and Bar |
| Grade | UNS N08120, UNS N08800, UNS N08810, UNS N08811, and UNS N08890 |
| Other Standards | ASTM B408 & ASME SB408 (Rod & Bar), ISO 9723 (Rod & Bar), BS 3076NA15 (Rod & Bar), DIN 17460 (Rod & Bar), EN 10095 (Rod & Bar) |
| Type of Bars | Hot-worked and Cold-worked |
| Shape of Bars | Round, Square, Hexagonal, or Rectangular solid section |
| Density | 8.89g/cm³ |
| Dimension | Rod Dia: 6 – 300mm x Length 1000 – 6000mm Bar Size: Width≤254mm x Thickness≥3.2mm |
| Inspection Certificate | EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection) |
| Tests | Chemical analysis, Tensile test, Grain size test, Intergranular corrosion test, Flatness %=(H/L) x 100, Metallographic examination |
Packing
Small diameter packed in plywood box; large diameter packed on plywood pallets.
Application
UNS N08120: This alloy is primarily used in high-temperature environments due to its resistance to oxidation and other forms of high-temperature corrosion. Typical applications include furnace parts and equipment, petrochemical furnace cracker tubes, pigtails, and headers in refineries.
UNS N08800 (Alloy 800): This nickel-iron-chromium alloy is known for its stability and resistance to oxidation and carburization in high-temperature environments. It is used in heat exchangers, furnace components, and chemical and petrochemical processing.
UNS N08810 (Alloy 800H): This is a high-carbon version of Alloy 800, designed for enhanced creep resistance. It’s suitable for parts that require high strength at temperatures up to 1200°F (649°C), such as industrial furnaces, heat-treating equipment, and pressure vessels.
UNS N08811 (Alloy 800HT): Similar to Alloy 800H but with further enhancements to improve creep resistance. This alloy finds applications in environments where temperatures exceed 1100°F (593°C), particularly in the petrochemical, thermal processing, and power industries.
UNS N08890: This material is known for its superior resistance to oxidation and other high-temperature corrosion mechanisms. It’s typically used in high-temperature industrial furnace applications and other settings where the environment is particularly aggressive.
