Exaton 27.7.5.L (GMAW)

Exaton 27.7.5.L is a hyper‑duplex (austenitic‑ferritic) MIG filler metal offering high yield strength, superior pitting and crevice corrosion resistance, and excellent resistance to hydrogen‑induced stress cracking.

Key Features

• Hyper‑duplex chemistry (≈65% ferrite, 27% Cr, 6.5% Ni, 5% Mo) for exceptional corrosion resistance
• Higher yield strength (≈755‑770 MPa) and tensile strength (≈900‑905 MPa) than super duplex grades
• Suitable for root‑pass welding of UNS S32750, S32760 and other super duplex steels
• Compatible with plasma welding, hot‑wire TIG, mechanized TIG and overlay applications
• Available in 0.8 mm and 1.2 mm diameters with multiple packaging options (1 kg, 15 kg, 20‑25 kg drums)

Specifications

• Classifications: EN ISO 14343‑A : G/W/P 27 7 5 N L
• Approvals: CE : EN 13479, UKCA : EN 13479
• Alloy Type: Austenitic‑ferritic duplex, approx. 65 % ferrite
• Shielding Gas: N₂ (EN ISO 14175)
• Tensile (AWS, As Welded): Yield 755 MPa, Tensile 905 MPa, Elongation 27 %
• Tensile (ISO, As Welded): Yield 770 MPa, Tensile 900 MPa, Elongation 24.5 %
• Charpy Impact (20 °C, As Welded): 126 J (AWS & ISO)
• Typical Wire Composition (%): C 0.015, Mn 1.0, Si 0.3, S 0.0007, P 0.017, Ni 6.5, Cr 27, Mo 5.0, V 0.07, Cu 0.15, N 0.4, Nb 0.01, Ti 0.001, Co 1, PRE 49, W 0.02
• Wire Diameter & Parameters:
  • 0.8 mm → 40‑120 A, 15‑19 V, 4‑8 mm/min feed
  • 1.2 mm → 150‑260 A, 24‑29 V, 3‑10 mm/min feed

Applications

• Welding 13 % Cr flow‑pipes and pipeline repair where high strength reduces repair rates
• Root‑pass welding of super duplex steels (UNS S32750, S32760) in pitting‑critical environments
• Overlay welding of hyper‑duplex (UNS S32707) tube sheets and heat‑exchanger components
• Plasma welding and mechanized TIG applications