Hi gckaeng, welcome to the forum.  
Like Jean i am also not familiar with the term "pulen" or . I have not seen the term “lempungan” in regards to keris, though i can see how the word could be used as a reference to describe a quality of pamor. I have seen the name "Sedayu" before, but as a place, not a pamor.  
The closest i seem to be able to come to understand what you mean is pamor kelengan. Is this the same as what you mean?
		 
		
		
		
		
		
		
		
		
			
				  
				
					
						Last edited by David; 6th February 2019 at 05:29 PM.
					
					
						Reason: left out the word "not" in error
					
				
			
		
		
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