Norinco Steel in the 1911's

I have an np30 and I love it

I have put maybe 8000 rounds through mine. It is outstanding. as for the .45acp. My gradfather used a thompson in ww2 and he said that the round was quite deadly. As was the .455 webley. The 9mm not so much. but we knew that.
 
Sorry to interrupt five pages of hero worship but somebody should point out to our author that there is no such thing as 5100 steel. The "00" in 5100 would indicate 0.00% carbon, and a steel with 0% carbon is not a steel.

Let's assume he was speaking generically of the 51xx class and the steel in question is something like a 5140, that would indicate a 0.40% carbon steel with 1% chromium. In other words, it's like a 4140 minus the molybdenum.

Look it up folks, the 51xx series is less alloyed than the 41xx series, and has lower hardness and strength across the board. Most of that quoted portion of the first post is pure bunk.
 
Sorry to interrupt five pages of hero worship but somebody should point out to our author that there is no such thing as 5100 steel. The "00" in 5100 would indicate 0.00% carbon, and a steel with 0% carbon is not a steel.

Let's assume he was speaking generically of the 51xx class and the steel in question is something like a 5140, that would indicate a 0.40% carbon steel with 1% chromium. In other words, it's like a 4140 minus the molybdenum.

Look it up folks, the 51xx series is less alloyed than the 41xx series, and has lower hardness and strength across the board. Most of that quoted portion of the first post is pure bunk.

One of the lad on the Battle Rifle forum had commented in regards to the M14 recievers, which may or may not be the same steel(athough it was clarification based on information from the same article). It stated;

"Most of what's in that post is true except that since that was first posted, Smith Enterprises has commissioned other testing and it's now well understood the Chinese steel formulation is actually an 8620 equivalent, and not a 5100 series nickel alloy.

This is not a bad thing, 8620 is a great steel and is what original M14's were made of. "


Now, as in journalism, you have to consider the source Smith Enterprises who have a vested interest in debunking any claim on the competition. But its worth mentioning in any event.
 
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