Basic composition and properties
Element
Composition Range (%)
Chromium (Cr)
18.0 – 20.0
Nickel (Ni)
8.0 – 10.5
Carbon (C)
≤ 0.08
Manganese (Mn)
≤ 2.0
Silicon (Si)
≤ 1.0
Phosphorus (P)
≤ 0.045
Sulfur (S)
≤ 0.030
Iron (Fe)
Balance
key Properties:
Corrosion Resistance: Resists oxidation, organic acids, and mild chemical environments.
Ductility/Toughness: Maintains strength and flexibility even at low temperatures (no ductile-to-brittle transition).
Weldability: Easily welded using common techniques (TIG, MIG, laser), though post-weld annealing may be needed to restore corrosion resistance.
Non-magnetic: Austenitic structure makes it non-magnetic in annealed condition (may become slightly magnetic after cold working).
manufacturing process
Welded Pipe Production:
Forming: Steel coils are unrolled, flattened, and formed into a cylindrical shape via rollers.
Welding: Edges are welded longitudinally using TIG, plasma, or high-frequency induction (HFI) w…