1.4828 is a heat resistant austenitic stainless steel. It has improved oxidation resistance, carburisation resistance and high temperature strength compared to standard grades like 304.
Approximate Composition – 20% Cr, 12.0% Ni, Si 2.0%, 0.10% C (EN composition range. No ASTM equivalent).
This grade combines the following characteristics:
- Good oxidation resistance up to 1000°C
- Good carburisation resistance up to 1000°C
- Good thermal shock resistance
- Good weldability
This grade can be regarded as a development of standard grade 304. Its increased chromium and nickel give it better oxidation resistance whilst silicon gives improved carburisation resistance. It is sometimes said to be equivalent to grade 309 but in fact, 309 has a higher Cr content and no Si. The relatively high carbon content gives strength at high temperatures.
Applications which illustrate these features include:
High end car exhaust systems, heating elements, furnace components, burners, heat treatment baskets, gas flare heads.