You can put the steel pipe inside of the lead and melt the lead to seal it. That's takes experience and some talent. You can join them with a rubber sleeve that is the right size on each end and held in place with hose clamps.
One cannot solder/ lead wipe lead to steel as one is ferrous and the other non ferrous metal You can lead wipe /solder lead to copper /bronze / brass To join to steel one had to lead wipe a brass nipple (called solder nipple) into the lead pipe and you have either male or female threads and then a union or left and right nipple and coupling to make a proper connection.''
By the way you cannot do a lead poured joint of steel into lead you can put the steel into a cast Iron hub and then use a caulked joint.
Also the use of a no hub or a mechanical coupling will not be good for a water or gas tight against a lead pipe as lead is to soft.
Lead pipes were typically joined using a method called "soldering," where molten lead was applied to the joint to create a seal. This process involved heating the ends of the pipes and then melting lead to fill the gap between them, ensuring a watertight connection. Additionally, some joints were made using threaded fittings, where the pipes were screwed together. However, due to health concerns over lead exposure, the use of lead pipes has been largely phased out in modern plumbing.
It depends on the material of the pipes
Pvc pipes are cheaper. They are easier to join. They last longer.
The lead will leach into the water and give you lead poisoning.
I can't think you are talking drinking water pipes because anitfreeze is poisonous. Nor should you have lead pipes or lead solder in drinking water pipes. So either sleeve pipes or heating pipes then. Antifreeze has inhibitors designed to prevent corrosion.
Iron replaced lead in water pipes.
Welding is the process used to join metals together such as pipes. It involves using a combination of heat and pressure to melt the metals at their joint, allowing them to bond when cooled. Soldering and brazing are also common methods for joining metals with the use of a filler material that melts at a lower temperature than the base metals.
soilder
to your toilet
Lead pipes are not considered safe for use in plumbing systems because lead can leach into the water supply, posing health risks such as lead poisoning. It is recommended to replace lead pipes with safer alternatives.
It melts solder. Solder was originally a mix of lead and tin that was used to join copper to copper (pipes and wiring) It is in the shape of a pistol, but does not shoot anything.
Lead pipes were banned in 1969 because lead is poisonous, especially for the vulnerable (children, pregnant women and the elderly). But, many pre-1970s homes will still have lead pipes today and they have been used in the UK for drinking water for almost 2000 years. The lead content in water is significantly reduced by calcium deposits etc on the inside of pipes but many home owners prefer to replace lead with copper pipes when renovating.