A SUPER DUPLEX TIG WIRE WITH COPPER FOR WELDING. SUPER DUPLEX ALLOYS OF SIMILAR COMPOSITION.
IDENTIFICATION
GM 2553, ER 2553
CLASSIFICATION
AWS/SFA 5.9: ER 2553
DESCRIPTION
GM 2553 is designed to weld similar alloys usually supplied as castings. The addition of copper improves corrosion resistance in sulphuric acid media and also increase strength and wear resistance. 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 minimise the risk of cracking, particularly in highly restrained welds.
CHEMICAL ANALYSIS (RANGE) %
| C | Cr | Ni | Mn | Si | S | P | Mo | Cu | N |
| 0.04 max | 24.0 - 27.0 | 4.50 - 6.50 | 0.5 - 1.5 | 1.0 max | 0.03 max | 0.04 max | 2.90 -3.90 | 1.5 - 2.5 | 0.10 - 0.25 |
MECHANICAL PROPERTIES (RANGE)
| UTS (MPa) | EL (%) (L=4D) | CVN Impact Value | |
| Temp | Joules | ||
| 760 min | 15 min | 20°C | 45 - 80 |
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
MICROSTRUCTURE
In the solution treated condition the microstructure is duplex with about 30-60% ferrite dependent upon dilution.
SHIELDING GAS : (88% Argon + 10% He + 2% N)
PACKING PARAMETERS
| Size (mm) | Weight / Spool (kg) |
| 0.8 | 12.5 |
| 1 | 12.5 |
| 1.2 | 12.5 |
| 1.6 | 12.5 |