GM 2553

A SUPER DUPLEX TIG WIRE WITH COPPER FOR WELDING

SUPER DUPLEX ALLOYS OF SIMILAR COMPOSITION.

IDENTIFICATION : ER 2553
CLASSIFICATION : AWS/SFA 5.9: ER 2553

CHARACTERISTICS :

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.

TYPICAL USES :

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.

COMPOSITION OF THE WIRE (RANGE) %:

C Cr Ni Mn Si S P Mo Cu N
0.03 max 24.0-27.0 4.50-6.50 0.5-1.5 1.0 max 0.03 max 0.03 max

2.90- 3.90

1.5-2.5 0.10-0.25

MECHANICAL PROPERTIES (RANGE) :

Ultimate Tensile Strength MPa Elongation(%)(L=4D) Charpy V-notch impact strength
690-800 20-35 Temp Joules
20oC 45-80

Materials to be welded:

  • ASTM A351, A744(cast)- CD4MCu, UNS J93370.
  • ASTM A240(wrought)- UNS S32550
  • BS 3146- ANC 21, BS 3100 332C13
  • DIN 1.4515, 1.4517

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 DATA :

SIZE (mm) Weight of the spool, Kg
0.8 12.5
1.0 12.5
1.2 12.5
1.60 12.5