`Egyptian armor plate tank weld cracking`

Brief reference. Austenitic filler metal welded to armor steel produced a martensite-austenite mixture in the diluted zone, which cracked. Used to illustrate the Fe-Cr-Ni phase diagram regions to avoid.

Anyway, you can get austenite-martensite — this is what happened with the Egyptian tanks. They used an austenitic filler metal with the armor steel, and they ended up in this region and they got cracking because of the martensite. Some of these surgical stainlesses are over here. You can get in these regions, you can get the duplex stainless steels, but you have to be careful about your welding procedure.