AWS A5.28 ER80S-B2 MIG Welding Wire with 125% Cr-0.5% MO, is designed for welding low-alloy steels with high tensile strength and creep-resistant steels such as ASTM type: Al 99-76, A200-75, A213-76d, A335.76 A369-76, A387-76. Suitable for pipelines and pressure vessels with operating temperatures at from 350—550℃. The deposited metal has low impurity elements such as phosphorous and sulfurous(S) to minimize tempering embrittiement.

MIG Welding Wire 

Characteristics and Application

Typical chemical Composition of Weld Metal (%)

Welding Positions:

Notes on usage:

1.Use DC-(DCEN) polarity and 100% Argon gas at proper flow rate (10-15 1/min, max. wind 1 m/sec).

2.Trailer Shield is required to ensure the weld pool completely shielded by inert gas until solidification is complete and no porosity problem.

3. Select right gas cup size and employ proper stick out of tungsten electrode.

4. Be sure to clean up the contaminations on the base metal and welding seam so as not to derogate the weld metal quality from particles.

5. To prevent cold cracking, preheating and interpass temperature should be 150-250℃

6. Postweld heat treatment should be 650-700℃ to remove residual stress.

7. Heat input should be properly controlled prevent from excessive heat input can cause hot cracking and, deteriorate tensile properties and notch toughness.

Typical Mechanical Properties of Weld Metal

C 0.09  Mn 0.60 Si 0.55  P 0.010  S 0.010 Cr 1.42  Mo 0.52 Cu 0.03

AWS A5.28 ER80S-B2

Yield strength 470MPa  Tensile Strength 600MPa  Elongation 26%  PWHT 620℃X1hr