- Grade / Alloy
- Alloy 330
- EN / W.Nr.
- 1.4864
- AISI / SAE
- —
- UNS
- —
- Family
- Nickel-iron
Chemical composition
Chemical composition
Typical compositionTypical composition of the principal alloying elements; not a complete acceptance analysis.
| Element | Content (% by mass) |
|---|---|
| NiNickel | 35.5 |
| CrChromium | 19 |
| FeIron | Balance |
| SiSilicon | 1.2 |
| CCarbon | 0.06 |
Values describe the grade, not the analysis of a specific batch. The applicable product specification and material certificate determine acceptance. A dash does not mean zero.
An alloy for hot environments
Alloy 330 is associated with furnace atmospheres rather than general-purpose stainless applications. Its high nickel content supports structural stability during temperature changes, while chromium and silicon contribute to a protective surface layer.
Why surface resistance matters
A furnace component may encounter oxygen as well as carbon-bearing gases. Oxidation is reaction with oxygen; carburisation is the entry of carbon into the metal. Resistance to both explains why 330 is assessed beyond room-temperature tensile strength.
Its place in furnace equipment
Baskets, chains and hangers handle hot loads; fans, combustion tubes and protective sheaths encounter heated gases. Alloy 330 serves these components, combining hot mechanical properties with an adherent surface layer through heating and cooling cycles.
330, DS and material designations
330 designated 1.4864 is distinct from DS designated 1.4862. The name Alloy 330 also occurs under standards with different composition limits. Manufacturer literature describes N08330 as a separate lower-chromium variant, so 1.4864 and N08330 do not invariably represent the same composition.
Typical application areas
Furnace internals, baskets, hangers and hot-gas equipment.
Product and cutting options
Relevant product forms for this material are listed below. Availability varies with grade and dimensions.