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ASTM A 264 and ASTM A 240

ASTM A 264 and ASTM A 240

ASTM A 264 and ASTM A 240

We specify a A 36 plate to be clad as per ASTM A 264 and ASTM A 240, Type 316L steel.  Would you consider a 316 weld overlay by GMAW process in order to produce the clad plate instead of hot rolling or explosive bonding the stainless steel plate to the structural plate?  Is that right?  Is it a possible interpretation of the standards mentioned?

Thanks for your answer.

RE: ASTM A 264 and ASTM A 240

I can't believe that any sizable quantity of clad plate could be economically produced by GMAW weld overlay, as compared to hot rolling or explosive bonding.  If a very small quantity of plate is required, which is below the typical mill minimum order, then maybe the GMAW weld overlay could win out economically.  From a technical standpoint, my only concern with the GMAW overlay would be dilution of the alloying elements by the carbon steel backing plate.

RE: ASTM A 264 and ASTM A 240

For small jobs we have use laser welding to clad plate.

RE: ASTM A 264 and ASTM A 240

ASTM A-264 states that "the alloy-cladding metal may be metallurgically bonded to the base metal by any method that will produce a clad steel which will conform to the requirements of this specification". However, using the GMAW process to overlay a large does not area sound like a very efficent way to accomplish this. If welding overlay is going to be used, especially on a large area I would suggest the Submerged Arc Welding process or better yet the Strip Welding Submerged Arc overlay process. The improtant thing when using welding to overlay is the clad chemistry and minimizing dilution. Using DCEN (straight polarity) will help.

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