Welding of Cladded plate of SA36+Alloy C276 with SA36+Alloy C276

[Bhanu Pratap]

Please help for developing welding procedure for below details:-

Absorber Tank Plate material - Cladded plate (SA36+Alloy C276) with (SA36+Alloy C276)

Thicknesses - 10mm(8mm-SA36 & 2mm-C276)

                        14mm(12mm-SA36 & 2mm-C276)

                        22mm(20mm-SA36 & 2mm-C276)

                        27mm(25mm-SA36 & 2mm-C276)

Kindly suggest weld joint design, Welding Process, Filler wire specifications, Type of test required for procedure development.

Kindly help in this regard as I'll be highly obliged

[james gerald]

Pratap,

Considering you have access to welding of clad side, the below procedure can be used.

1. Strip back the clad(C-276) side 5-10mm from the root or toe of the carbon steel(CS) Joint.

2. Weld the carbon steel portion using Groove weld CS procedure(WPS/PQR) existing or qualified based on the applicable substrate or base metal Thickness.

3. You need to Qualify a Clad restoration overlay PQR as below.

a. Use a SA36 base plate of dimension 150mm x 150mm x 8mm thicknes.

b. ASME Sec.iX QW-453 Table shall be taken as a Guideline.

c. USE Welding electrode ENiCrMo-4 and weld a 38mm wide (minimum layers as per requirement of chemistry height) on the 150mm x 150mm plate.

d. Perform  following tests.

i. Liquid Penetrant examination on the overlay weld sample.

ii. Perform 4 side bend test. (Material testing lab will provide you the detail)

iii. Chemical Analysis as per specification requirement height from the Top or Fusion layer.

Upon qualifying the PQR, restore the strip back clad area by weld overlaying.

Thanks & Regards

J.Gerald Jayakumar

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