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kfwah · 13 April 2012, 01:04 AM

hI GUYS, DID ANYONE KNOW WHEN ROLEX STARTING TO USE 904L STAINLESS STEEL TO MADE THEIR WATCH CASES? I HAVE A YEAR 1990 AIR KING, REF 14000 A 22 YEARS OLD WATCH, BUT I NOT SURE WHAT KIND OF STAINLESS STEEL IS USING.

ANY COMMENT?

padi56 · 13 April 2012, 01:23 AM

It was around 1987 with the 168000 sub 904L was introduced and most watches followed soon after.But there is nothing magical about 904L,the main difference between 316L over 904L it has slightly more Molybdenum(Mo)approx 2% more approx 1-2% more Crome(Cr) 1% copper(Cu) and approx 10% more nickel and thats it.And in many ways the 316L can be better than 904L being a slightly softer steel it scratches slightly more than the 316L.

Monte Cristo · 13 April 2012, 02:15 AM

Quote:

Originally Posted by padi56

It was around 1987 with the 168000 sub 904L was introduced and most watches followed soon after.But there is nothing magical about 904L,the main difference between 316L over 904L it has slightly more Molybdenum(Mo)approx 2% more approx 1-2% more Crome(Cr) 1% copper(Cu) and approx 10% more nickel and thats it.And in many ways the 316L can be better than 904L being a slightly softer steel it scratches slightly more than the 316L.

Your knowledge is truly phenomenal

Now you wouldn't have the formula to convert lead into gold by any chance?

kfwah · 13 April 2012, 03:38 AM

Thanks for your information :)

13 April 2012, 01:04 AM	#1
kfwah "TRF" Member Join Date: Apr 2012 Location: MALAYSIA Posts: 17	Rolex watch cases hI GUYS, DID ANYONE KNOW WHEN ROLEX STARTING TO USE 904L STAINLESS STEEL TO MADE THEIR WATCH CASES? I HAVE A YEAR 1990 AIR KING, REF 14000 A 22 YEARS OLD WATCH, BUT I NOT SURE WHAT KIND OF STAINLESS STEEL IS USING. ANY COMMENT?

13 April 2012, 01:23 AM	#2
padi56 "TRF" Life Patron Join Date: Jun 2005 Real Name: Peter Location: Llanfairpwllgwyng Watch: ing you. Posts: 53,034	It was around 1987 with the 168000 sub 904L was introduced and most watches followed soon after.But there is nothing magical about 904L,the main difference between 316L over 904L it has slightly more Molybdenum(Mo)approx 2% more approx 1-2% more Crome(Cr) 1% copper(Cu) and approx 10% more nickel and thats it.And in many ways the 316L can be better than 904L being a slightly softer steel it scratches slightly more than the 316L. __________________ ICom Pro3 All posts are my own opinion and my opinion only. "The clock of life is wound but once, and no man has the power to tell just when the hands will stop. Now is the only time you actually own the time, Place no faith in time, for the clock may soon be still for ever." Good Judgement comes from experience,experience comes from Bad Judgement,.Buy quality, cry once; buy cheap, cry again and again. www.mc0yad.club Second in command CEO and left handed watch winder

13 April 2012, 03:38 AM	#4
kfwah "TRF" Member Join Date: Apr 2012 Location: MALAYSIA Posts: 17	Thanks for your information :)

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