I'll ask two more related questions then:

I've heard it's very unforgiving to braze SS lugs to steel tubes. Is this true the other way around (4130 lugs to SS tubes)?

For a 1" steer tube, the standard head tube OD seems to be 31.7mm which would make the ID 29.5mm with 1.1mm wall thickness. Would it be okay to take a thicker tube (32mm, or 1.25 in) and have it reamed out to 29.5 ID? The walls would be slightly thicker. I'm struggling to find SS head tubes in stock right now.

To allay anyone's fears, this is all hypothetical from me. I'm entertaining the idea of replacing a cracked head tube on a frame, and I know using SS is downright stupid for a first-timer.