Hi Vladimir,
No IPC spec yet, but HP limits cooling rates for Pb-free to 1.5C/sec.

Werner Engelmaier
Future workshops:
Reliability Issues with Lead-Free Soldering Processes, June 19, London
Interconnect Failures and Design for Reliability for PCB PTHs, June 19, 
London
Solder Joint Reliability: Parts 1 through 4, July 17/18, Thal, Switzerland
Pb-Free Soldering Processes—Survival, Quality, Reliability, August 18, 
Orlando
Reliability Issues with Lead-Free Soldering Processes, September 22, 
Schaumburg
Failure Mode and Root Cause Analyses Reliability (Fatigue, Brittle Fracture, 
ENIG), September 22, Schaumburg



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