Bar and Rod
Plate and Sheet
Strip
Pipe and Tube
Wire
Welding
Powder Material
Cast Products
Forged Products
Fittings
Fastening
Round Bar:
φ2–500 mm, 1–6 m length
Flat/Square Bar:
4–100 mm thickness/width
Hex Bar:
A/F 3–100 mm
Hollow Bar:
OD 20–300 mm
Sheet:
0.3–6 mm thickness
Medium Plate:
6–25 mm thickness
Heavy Plate:
25–100 mm thickness
Standard Strip:
0.05–3 mm thick,
10–600 mm wide
Precision strip:
0.01–0.5 mm thick,
tight tolerance ±0.005 mm
Foil:
0.005–0.1 mm thick
Seamless Tube:
OD 6–450 mm,
WT 1–50 mm,
1–12 m length
Welded Tube:
OD 10–600 mm,
WT 1–20 mm
Capillary Tube:
OD 1–10 mm,
WT 0.1–2 mm
Wire Form:
Cold Drawn Wire,
Bright Wire,
Spring Wire,
Fine Wire,
Ultra-fine Wire
General Diameter:
φ0.1–10 mm
Coil Weight:
50–500 kg,
customizable tolerance
Solid Wire:
φ0.8–4.0 mm
Flux-cored Wire:
φ1.2–4.0 mm
Welding Rod:
φ2.0–5.0 mm
Powder Form:
AM 3D Printing Powder,
Spherical Powder,
Gas-atomized Powder,
Water-atomized Powder
Particle Size:
10–150 μm
Sphericity:
≥90% for AM grade
Cast Ingot:
φ200–800 mm
Precision Casting:
min wall 0.5 mm
Cast Pipe:
OD 100–600 mm,
WT 10–50 mm
Forged Bar:
Φ35–500 mm
Forged Ring:
OD 200–2000 mm
Forging Weight:
1–5000 kg
Fittings Form:
Elbow, Tee, Reducer, Flange, Cap, Outlet, Lap Joint
Size range:
1/2''–24'' (DN15–DN600)
Wall thickness:
Sch10–Sch160, STD, XS, XXS
Pressure Class:
150–2500 LB
Fastening Form:
Bolt, Nut, Screw, Stud, Washer, Pin, Rivet
Metric: M3–M64
Imperial: #4–2.5''
Length: 6–500 mm
Haynes HR-120 is a solid-solution-strengthened nickel-iron-chromium heat-resistant alloy. This datasheet presents the material within the American (ASTM / ASME / UNS) standard system.
A solid-solution-strengthened heat-resistant alloy, Haynes HR-120 provides excellent strength at elevated temperature combined with very good resistance to carburizing and sulfidizing environments. Its oxidation resistance is comparable to other widely used Fe-Ni-Cr materials such as alloys 330 and 800H, but its strength at temperatures up to 1095 °C (2000 °F) is significantly higher — even in comparison to nickel-chromium alloys. Alloying additions of tungsten, niobium and nitrogen improve high-temperature strength and resistance to localized attack, while aluminium improves oxidation and sulfidation resistance; its high iron content makes it an economical choice. It is readily formed hot or cold and is commonly welded with Haynes 556 filler wire. It is supplied in the solution-annealed condition.
Typical applications include heat-treatment baskets and fixtures, radiant tubes, recuperators, furnace muffles and retorts, wire-mesh furnace belts, superheaters, waste-incineration and mineral-processing equipment, and land-based gas-turbine components.
| Property | Value | Unit |
|---|---|---|
| Density | 8.06 | g/cm³ |
| Melting range | 1315–1370 | °C |
| Elastic modulus | 206 | GPa |
| Coefficient of thermal expansion (20–100 °C) | 15.2 | µm/m·°C |
| Thermal conductivity (20 °C) | 11.3 | W/m·K |
| Specific heat (20 °C) | 450 | J/kg·K |
| Structure | Austenitic (FCC) | — |
| Element | Symbol | Min % | Max % | Role in Alloy |
|---|---|---|---|---|
| Nickel | Ni | 35.0 | 39.0 | Austenite stabiliser; thermal stability |
| Iron | Fe | Balance | — | Base element; economy |
| Chromium | Cr | 23.0 | 27.0 | Oxidation / sulfidation resistance |
| Cobalt | Co | — | 3.0 | Residual |
| Molybdenum | Mo | — | 2.50 | High-temperature strength |
| Tungsten | W | — | 2.50 | High-temperature strength |
| Niobium | Nb | 0.40 | 0.90 | Strength; localized-corrosion resistance |
| Nitrogen | N | 0.15 | 0.30 | Strengthening |
| Aluminium | Al | — | 0.40 | Oxidation / sulfidation resistance |
| Carbon | C | 0.02 | 0.10 | Carbide strengthening |
Solution-annealed condition, typical values for UNS N08120.
| Condition | Property | Value |
|---|---|---|
| Solution annealed | Tensile strength (UTS) | ≥760 MPa (110 ksi) |
| Solution annealed | 0.2% yield strength | ≥360 MPa (52 ksi) |
| Solution annealed | Elongation at break | ≥40 % |
| At 1095 °C | High-temperature strength | Significantly higher than 330 / 800H |
| — | Elastic modulus | 206 GPa |
Confirm against the mill test report. The alloy's elevated-temperature strength is significantly higher than other Fe-Ni-Cr heat-resistant alloys, even up to 1095 °C.
| Environment | Performance | Notes |
|---|---|---|
| Carburisation | Excellent | Better than stainless steels |
| Sulfidation | Excellent | Better than 800H, 347SS, 321SS |
| High-temperature oxidation (to ~1150 °C) | Very Good | Comparable to 330 / 800H |
| Hot corrosion / molten salts | Good | Burner-rig validated |
| Nitriding | Good | High chromium |
The high chromium content with aluminium gives oxidation resistance comparable to other Fe-Ni-Cr alloys, while the alloy provides notably better resistance to carburizing and sulfidizing environments than stainless steels and alloys 800H, 347SS and 321SS, combined with significantly higher elevated-temperature strength.
A single-phase solid-solution alloy; not hardenable by precipitation. Properties are set by solution annealing.
Anneal Solution anneal at approximately 1175 °C (2150 °F) and rapidly cool (water or rapid air cool) to retain the best balance of properties. The alloy is not strengthened by heat treatment; all hot- or cold-worked parts should be annealed and rapidly cooled.
Good weldability; readily welded by gas-tungsten-arc, gas-metal-arc and shielded-metal-arc processes, commonly using Haynes 556 filler wire. Welding is performed on solution-annealed material with clean surfaces.
| Welding Process | Applicability | Filler / Consumable |
|---|---|---|
| GTAW / TIG | Good | Haynes 556 filler |
| GMAW / MIG | Good | Haynes 556 filler |
| SMAW / stick | Good | Matching electrode |
Weld on solution-annealed material with clean surfaces, commonly using Haynes 556 filler.
Machining Guidelines
| Parameter | Recommendation |
|---|---|
| Machinability | Difficult; work-hardens, rigid setups, sharp tooling |
| Speeds | Slow speeds, positive feeds, no dwelling |
| Coolant | Ample coolant |
Forming Processes
| Process | Notes |
|---|---|
| Cold forming | Good ductility; work-hardens, anneal between heavy operations |
| Hot forming | ~1175 °C; anneal and rapid-cool afterward |
| Industry | Typical Components | Key Requirements |
|---|---|---|
| Heat treatment | Baskets, fixtures, retorts, muffles | Carburisation + strength |
| Industrial heating | Radiant tubes, recuperators, belts | High-temperature strength |
| Waste / minerals | Incineration and processing hardware | Sulfidation + carburisation resistance |
| Power generation | Land-based gas-turbine components, superheaters | Strength + oxidation resistance |
| Product Form | ASTM Standard | ASME |
|---|---|---|
| Plate, sheet and strip | ASTM B435 | ASME SB-435 |
| Bar and forgings | ASTM B564 | ASME SB-564 |
| Seamless pipe and tube | ASTM B622 | ASME SB-622 |
| Wrought fittings | ASTM B366 | ASME SB-366 |
Nickel-iron-chromium solid-solution heat-resistant alloy. UNS N08120.
| Alloy | Cr % | Ni % | Fe % | Best Used For |
|---|---|---|---|---|
| Haynes HR-120 | 23–27 | 35–39 | balance | High-strength Fe-Ni-Cr heat-resistant; carburisation/sulfidation, furnace parts |
| Incoloy 800H | 19–23 | 30–35 | balance | General high-temperature creep service |
| Incoloy 330 | 17–20 | 34–37 | balance | General heat-resistant; carburisation resistance |
| Haynes 230 | 20–24 | balance | ≤3 | High-temperature strength + oxidation |
| Haynes 556 | 21–23 | 19–22.5 | balance | Fe-Ni-Cr-Co; sulfidation, chlorine, molten salts |
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