GRIBINOX 2594L

A SUPER DUPLEX ELECTRODE FOR WELDING ALLOYS OF SIMILAR COMPOSITION.

IDENTIFICATION : GRIBINOX 25.9.4 L E 25.9.4-15
SPECIFICATIONS : AWS/SFA 5.4:E2594-15 EN 1600 : E2594 NLR

CHARACTERISTICS :

Gribinox 25.9.4 electrode is designed to match similar alloys The electrode gives matching strength and corrosion resistance in the solution treated condition but can also be used in the as-welded condition. Nitrogen and nickel contents are controlled to give a balanced duplex structure to minimize the risk of cracking, particularly in highly restrained welds.

TYPICAL APPLICATION :

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 : 100°C max

Heat m-put : 0.5-1.5kJ/mm

Scaling temperature : Approx 850°C(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 40°C.


WELD METAL ANALYSIS (RANGE) % :

C Cr Ni Mn Si S P Mo Cu N
0.04 max 24.0-27.0 8.0-10.5 0.5-1.5 1.0 max 0.03 max 0.035 max 3.5-4.5 0.75 max 0.20-0.30

MECHANICAL PROPERTIES (RANGE) :

Ultimate Tensile Strength MPa Yield Stress MPa Elongation (%) (L=4D) Charpy V-notch Impact Strength
700-880 550-620 18-35 Temp Joules
20°C 45-80

RECOMMENDED CURRENT AND PACKING DATA :

SIZE (mm) LENGTH (mm) CURRENT CONDITION AC(OCV:70V)/DC(+)(AMPS) PACKING PER BOX, KG WEIGHT 1000 PCS, KG
2.50 350 60-90 2 X 10 = 20 20.50
3.15/3.20 350 70-120 2 X 10 = 20 33.0
4.00 350 100-155 2 X 10 = 20 52.0