254 is a 18% Ni, 20% Cr, 6% Mo super austenitic stainless-steel grade with 0.2% nitrogen additions, particularly designed to be cost effective. The 18% nickel and 0.7% copper additions combined with the chromium and molybdenum additions enhance the performance of the steel in many corrosive solutions encountered for example in chemical and petrochemical processes or chloride containing solutions.
The alloy is also seawater resistant and has extensively been used in offshore applications (It is not recommended for use in stagnant seawater applications with temperatures higher than 30°C (86°F).
C≤ 0.02 SI ≤0.80 Mn ≤1.00
Cr 19.50-20.50 Ni 17.50-18.50 Mo 6.10-6.50
N 0.2 S 0.001 Others Cu=0.7
PREN = [Cr%] + 3.3 [Mo%] + 16 [N%] ≥ 42
0.2 % Yield Strength Rpt ≥ N / mm² 300
Tensile Strength N / mm² 650-850
Elongation A5 ≥ % 35
• Natural and treated seawater systems, desalination plants
• Pollution control: smelters (ducting, chimneys linings...)
• Bleaching equipment for pulp and paper industries (washers)
• Chemical industries: chloride containing media; phosphoric acid, sulphury acid - Fine chemical production