welding AISI 4140 material
welding AISI 4140 material
(OP)
Does anyone have experience in welding AISI 4140 material to ASTM A36 material? Can I use E70xx electrodes? Is preheat and postheat necessary? I contacted AWS and they had no help on this.






RE: welding AISI 4140 material
RE: welding AISI 4140 material
If you weld 4140 than has been heat treated you will have to do some level of post-weld heat treatment to restore its mechanical properties. Since you are tying to A36 this might not be a big deal.
Pre-heat and post-heat will be dictated by thickness of the parts as well as the restoration of mechanical properties.
Ron