- Grade / Alloy
- Alloy DS
- EN / W.Nr.
- 1.4862
- 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 | 36.5 |
| CrChromium | 17.5 |
| FeIron | Balance |
| SiSilicon | 2 |
| CCarbon | 0.07 |
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.
What is Alloy DS?
DS, designated 1.4862, belongs to the iron–nickel alloys used at high temperatures. Its purpose extends beyond ordinary rust resistance: the component needs retained strength while its surface withstands reactions with furnace gases.
Its role in carbon-bearing atmospheres
Carbon can enter a metal from the atmosphere in certain industrial furnaces. This is called carburisation. Chromium and silicon in DS support a protective surface layer, a useful characteristic where oxidising and carburising conditions alternate.
Where is it used?
Baskets and hangers support hot components, while fans and combustion tubes meet hot gases directly. DS serves these duties as well as thermocouple protection sheaths and furnace handling equipment. Repeated heating and cooling is a common feature of these applications.
Relationship to Alloy 330
DS and Alloy 330 are closely related but distinct. DS uses 1.4862 and 330 uses 1.4864, with different chromium and silicon limits. They therefore remain separate materials rather than interchangeable names.
Typical application areas
Furnace baskets, hot-gas fans, combustion tubes and thermocouple sheaths.
Product and cutting options
Relevant product forms for this material are listed below. Availability varies with grade and dimensions.