A SUPER DUPLEX ELECTRODE FOR WELDING ALLOYS OF SIMILAR COMPOSITION
IDENTIFICATION
GRIBINOX 25.9.5L E 25.9.5-15
CLASSIFICATION
AWS/SFA 5.4:E25.9.5-15
DESCRIPTION
Basic coated electrode 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.
WELD METAL ANALYSIS (RANGE) %
| C | Cr | Ni | Mn | S | P | Mo | Cu | Si | N | W |
| 0.04 | 24.0 - 27.0 | 8.0 - 10.5 | 2 | 0.025 | 0.03 | 2.5 - 4.5 | 0.40 - 1.50 | 0.7 | 0.20 - 0.30 | 0.4 - 1.0 |
| max | max | max | max | max |
MECHANICAL PROPERTIES (RANGE)
| UTS (MPa) | EL (%) (L=4D) | CVN Impact Value | |
| Temp | Joules | ||
| 760 min | 15 min | -40°C | 45 min |
| -50°C | 54 min | ||
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, UNSS32550, S3 2750, S32760 (wrought)
• ASTM A240 (wrought) – UNS S32550
• UNS : 393770, J93380, J93404
• DIN 1.4515, 1.4517 CD 4MCuN (cast) and similar composition.
• Steel EN 1.4410, NF 23CND 2506AZ, SS2328.
• Standard duplex : S 31803 and UNS 532205
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 : 1.0 - 1.5 kJ / 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.
WELDING POSITION :
PACKING PARAMETERS
| Size (mm) | Length (mm) | Amps DC (+) | Packing / Box (kg) | Packing / Box (Pcs) |
| 2.5 | 350 | 60 - 90 | 2 x 5 = 10 | 94 x 5 = 470 |
| 3.15 / 3.20 | 350 | 70 - 120 | 2 x 5 = 10 | 60 x 5 = 300 |
| 4 | 350 | 100 - 155 | 2 x 5 = 10 | 38 x 5 = 190 |
| 5 | 350 | 130 - 180 | 2 x 5 = 10 | 24 x 5 = 120 |