BÖHLER A204 is a stainless austenitic Cr-Ni-Mo steel with low carbon content. Resistant to intergranular corrosion up to 750°F (400°C). Heat treatment after welding not required.
Good resistance to reducing acids, such as diluted sulfuric and hydrochloric acid, and to localized corrosion attack in media containing chlorine ions. Required surface finish pickled or polished. Very good cold formability, highly polishable.
Use for watch industry, apparatus in the chemical, paper, cellulose, textile and pharmaceutical industries. Nuclear technology: Equipment subject to increased corrosion stress, also by media containing Cl, e.g. steam generator and superheater tubes in pressurized water reactors, condenser tubes, tube plates, fittings.
Steelmaking Process: Airmelt
Chemical Analysis: lean + low S, Ni, Mo, less Ti, Nb, V
Ferrite Content: minor, max. 0,5%
Cleanliness: good, DIN K3 max. 10
Grain Size: 6 and finer
Polishabaility: good
Corrosion Resistance: good
| C | Si | Mn | P | S | Cr | Mo | Ni | N | |
|---|---|---|---|---|---|---|---|---|---|
| max. 0.030 | max. 1.00 | max. 2.00 | max. 0.045 | max. 0.030 | 17.0 to 19.0 | 2.50 to 3.00 | 12.5 to 15.0 | max. 0.10 |
