Description
EN58C Round Bars
EN58C Round Bars is a Titanium stabilised Chromium Nickel Austenitic Stainless Steel with good strength and excellent corrosion resistance, usally supplied in the annealed condition. Characterised by high corrosion resistance in general atmospheric corrosive environments it exhibits excellent resistance to most oxidizing agents, general foodstuffs, sterilizing solutions, dyestuffs, most organic chemicals plus a wide variety of inorganic chemicals, also hot petroleum gases, steam combustion gases, nitric acid, and to a lesser extent sulphuric acid. It displays good oxidation resistance at elevated temperatures has excellent resistance to intergranular corrosion and has excellent weldability.
EN58C grade is typically used in the 800-1500˚F temperature range where it is stabilized against chromium carbide precipitation by the addition of titanium, which results in the precipitation of titanium carbides. EN58C has excellent intergranular corrosion resistance after exposure to this temperature range, and this grade resists oxidation up to 1500˚F and has higher creep and stress rupture properties. It also possesses good low temperature toughness and is non-magnetic in the annealed condition.
It is used primarily in oil refinery equipment, pressure vessel piping, radiant superheaters, bellews, and high-temperature heat treatment equipment.
EN58C Chemical Composition of BS 970 (1955) EN58C :
| Elements | Min. | Max. |
| C | – | 0.15 |
| Si | 0.20 | – |
| Mn | – | 200 |
| S | – | 0.045 |
| P | – | 0.045 |
| Ni | 9.00 | 12.00 |
| Cr | 17.00 | 20.00 |
| Ti | 4 x C Min. | – |
Application of EN58C :
Food Processing
Dairy & Brewing Equipment
Chemical & Oil Refinery Plant
Petrochemical
Cooking Utensils
Aircraft Construction
Steam
Hydraulic and Mechanical Engineering Components
Transport and associated industries etc.
Heat Resistance of EN58C :
Good oxidation resistance in intermittent service to 900 °C and in continuous service to 925 °C. These grades perform well in the 425-900 °C range, and particularly where subsequent aqueous corrosive conditions are present.
Heat Treatment of EN58C:
Solution Treatment (Annealing) – heat to 950-1120 °C and cool rapidly for maximum corrosion resistance.
Stabilizing – heat to 870-900 °C for 1 hour per 25mm of thickness and air cool. Stabilization is recommended for most severe service conditions (above 425 °C) and particularly for material annealed at the upper side of the annealing temperature range.
Stress Relief – Heat to 700 °C for 1 to 2 hours and air cool.
These grades cannot be hardened by thermal treatment.
