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Jim Watson · June 27, 2008, 07:07 AM

4140 is chrome molybdenium alloy steel, one of the most common "ordnance steels" in guns of current manufacture.

1140 is carbon steel with some manganese. Cheaper.

June 27, 2008, 07:07 AM	#2
Jim Watson Senior Member Join Date: October 25, 2001 Location: Alabama Posts: 18,543	4140 is chrome molybdenium alloy steel, one of the most common "ordnance steels" in guns of current manufacture. 1140 is carbon steel with some manganese. Cheaper.