NA22H
Purchase of NA22H scrap (2.4879, G-NiCr28W): decommissioned radiant tubes, centrifugal castings, burner cones and parts, rolls and furnace fixtures. Fast quotations and collection across Europe.
Nickel-based casting alloy (Ni 47-50 %, Cr 27-30 %, W 4-6 %) for service up to ~1150 °C, with outstanding resistance to carburisation and creep. Markets: radiant tubes, heat-treatment furnaces, petrochemicals and high-temperature plants.
- Forms radiant tubes · castings · cones · furnace fixtures
- Density ≈ 8.2 g/cm³
- Service up to ~1150 °C
Main elements
| Nickel (Ni) | 47 – 50 % |
|---|---|
| Chromium (Cr) | 27 – 30 % |
| Tungsten (W) | 4 – 6 % |
| Carbon (C) | 0.35 – 0.55 % |
| Silicon (Si) | 1.0 – 2.0 % |
| Manganese (Mn) | ≤ 1.5 % |
| Molybdenum (Mo) | ≤ 0.5 % |
| Iron (Fe) | balance |
Indicative values according to EN 10295 (2.4879, G-NiCr28W; trade designation NA22H / Alloy 22H). The actual composition is certified by analysis for each batch.
Physical and mechanical data
| Density | ≈ 8.2 g/cm³ |
|---|---|
| Service temperature | up to ~1150 °C |
| Carburisation resistance | outstanding, including reducing atmospheres |
| Creep resistance | high (values specified at 1000 h and 10000 h) |
| Structure | as-cast austenitic (centrifugal or static casting) |
The Ni, Cr and W content makes these castings a high-value scrap: the valuation depends on the analysis of the batch.
Where our NA22H ends up.
Radiant tubes
Centrifugally cast tubes for heat-treatment and reheating furnaces.
Industrial furnaces
Rolls, supports, muffles and retorts for high-temperature furnaces.
Petrochemicals
Components for steam reforming and cracking plants.
Burners
Cones, nozzles and burner parts exposed to direct flame.
Heat treatment
Baskets, grids and charging fixtures for carburising and hardening.
Carburising atmospheres
Parts in contact with carbon-rich atmospheres, where NA22H excels.
We collect NA22H in every form.
Decommissioned radiant tubes
Whole tubes and cut pieces from furnace revamping and demolition.
Castings and centrifugal casts
Static and centrifugal castings out of service or foundry rejects.
Burner cones and parts
End-of-life cones, nozzles and burner components.
Rolls and furnace fixtures
Rolls, supports, baskets and grids from heat-treatment furnaces.
Risers and foundry scrap
Gating systems, risers and machining rejects.
Turnings and chips
Machining chips, loose or compacted.
Have NA22H to sell?
Send us the material, approximate quantity and collection area: we will reply with a fast and competitive quotation.
Tel +41 91 9856992
Mobile +39 3494906948
contacts@giulianimetalli.com