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GM 25.9.4

IDENTIFICATION
GM 25.9.4, ER 25.9.4

CLASSIFICATION
AWS/SFA 5.9: ER 25.9.4

DESCRIPTION
Solid super duplex stainless wire for welding 2507 type of super duplex stainless steels.

CHEMICAL ANALYSIS (RANGE) %

C Cr Ni Mn Si W S P Mo Cu N
0.03 24.0 - 27.0 8.0 - 10.5 0.5 - 2.50 1 1 0.02 0.03 2.5 - 4.5 1.5 0.20 - 0.30
max max max max max max

MECHANICAL PROPERTIES (RANGE)

UTS (MPa) EL (%) (L=4D) CVN Impact Value
    Temp Joules
760 min 15 min -50°C 60 - 100

TYPICAL APPLICATIONS

Pumps and valves, corrosion / wear resisting parts and process equipment for use in offshore oil and gas industries, pulp, paper and textile industries, and chemical and petrochemical plant.

MATERIALS TO BE WELDED

  • SAF 2507, ASTM S-32750, S-32760
  • ASTM A351, A744(cast) - CD4MCu, UNS J93370.
  • ASTM A240 (wrought) - UNS S32550
  • BS 3146 - ANC 21, BS 3100 332C13
  • DIN 1.4515, 1.4517
  • Steel EN 1.4410, NF 23CND 25-06AZ, SS2328

MICROSTRUCTURE : In the solution treated condition the microstructure is duplex with about 30-60% ferrite dependent upon dilution.

INTERPASS TEMPERATURE : 100ºC max  

HEAT INPUT : 0.5-1.5k l/mm

SCALING TEMPERATURE : Approx 850ºC (air)

CORROSION TEMPERATURE : Very good resistance to pitting and stress corrosion cracking in Chloride containing environments. Pitting resistance in accordance with ASTM G-48A better than 40ºC

PACKING PARAMETERS

Size (mm) Weight / Spool (kg)
0.8 12.5
1 12.5
1.2 12.5
1.6 12.5