Assuming you are not going to do PWHT, then you definitely do not want to use heat sinks to help cool down a 4130 weld. A heat sink on a 4130 welded part that is not going to be PWHT is asking for a disaster if the part is subject to stress. Is that because in the case where heat sinks are used, th...

If 4130 steel in heat affected zones is harder and more brittle because of rapid cooling, would avoiding the use of heat sinks reduce the amount of hardening and embrittlement in the heat affected zone because of slower cooling? I thought of this question after reading this little welding tips and t...