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Post by sixsigmajhedi on Jun 20, 2005 12:19:27 GMT -5
Good review...There is just one thing that I wish the TV shopping gurus would do... That is, STOP USING THE TERM, "Surgical grade stainless steel". There is no such animal. I have worked with steel and exotic metals for over 15 years...From aerospace & Defense to swordmaking to surgical implements...there is no such thing as "Surgical grade steel". Check out: www.swordforum.com and look at the metallurgy forum to gain a more informed view of steel properties.Please take the following as constructive criticism, as i like the work that Jim does and I am really liking the Invicta line. (edited for mispelling) |
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Post by jskelton on Jun 20, 2005 14:00:34 GMT -5
jcrane: I'm not certain how they will be split up, but in many cases we buy the entire stock of LE pieces (but not always). Out of 1,000 we will probably bring in 400-500 for the initial shows, then take it from there. I know we will have a long running exclusive on them.
six: Thank you for the comments, and as always I take all comments (negative, positive, or constructive) to heart and it empowers me to become better every day. I will research more into this, thanks for the input.
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Post by sixsigmajhedi on Jun 20, 2005 15:57:29 GMT -5
Hey Jim,
Again, I appreciate the work you do and your professionalism. I just wanted to help you gain more credibility!
It's obvious that you know Invicta and watches in general, so keep up the good work!
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Post by juin212000 on Jun 22, 2005 3:15:35 GMT -5
Hi SixsigmaJhedi, since your the metal expert i was wondering do you happen to know the advantages of the steel used in a rolex. I believe the invicta uses 1.4435 or 316L while Rolex uses stainless steel 1.4439 or 904L. I believe the L stands for the ability to weld the steel while keeping its rust protection in place =) Thanks any between the two would be informative and interesting for me and sorry for hijaking this thread : )
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Post by jskelton on Jun 22, 2005 9:18:06 GMT -5
Jim, First, great pics & review, but I'm a bit confused. Eyal plainly said there would be 1000 of each color; 3000 total production. It was approx. 4:32 e.t. Sunday, if SNBC has tapes of the shows. You were talking, and didn't seem to hear him, but that is clearly what he said. Did he miss-speak, or was he referring to the new LE? Sometimes we talk fast and what you hear may not be what we mean in all cases. I stated in my review that there are 1,000 total pieces, and that is also what is denoted on the case back. There are 3 colors (and I aksed him to verify this on-air) and that there are a TOTAL of 1,000. |
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Post by jskelton on Jun 22, 2005 9:20:34 GMT -5
juin: The 904 that Rolex uses is more corrosion resistant, and is said to be able to withstand several types of acids. Many believe (myself included) that it is overkill and 316L is perfectly fine. Rolex simply uses 904 to be able to say "highest quality of all components" and it is a high grade of steel, but the problem is that more people have allergic reactions to 904 than 316L from what I understand.
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Post by juin212000 on Jun 22, 2005 12:01:09 GMT -5
Thanks Jim! I also found some interesting info at this website that tells the main difference's where it compares the different similar grades if anyone is interested =) 904L = www.azom.com/details.asp?ArticleID=1022316L = www.azom.com/details.asp?ArticleID=2382Rockwell hardness for 316L is 95? wonder if this means 9.5, which means it can scratch the sapphire! <---this can't be right though b/c its much much easier to scratch my stainless steel braclet, so i wonder what the ROH table means for steel... |
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Post by MarkA on Jun 22, 2005 12:05:28 GMT -5
Thanks Jim for your prompt reply.
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Post by sixsigmajhedi on Jun 22, 2005 15:40:46 GMT -5
316l is appropriate material. The 904 is similar in composition it all comes down to the removal/reduction of carbon and the increase in chromium/molybdenum/etc... content. I'll look up some tables for the particulars. BTW, I'm no steel expert...always in learning mode though!
As for rockwell hardness...Remember, there is no INHERENT rockwell hardness. It depends on the heat-treatment. Most watchmakers that use steel/stainless steel don't bother to heat treat, as there is no edge to hold and no real need for extreme shock resistance (i.e. gun hardening, or required flex). The main benefit of using a steel case is the inherent "beef" and density, regardless of heat treat.
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Post by sixsigmajhedi on Jun 22, 2005 17:27:53 GMT -5
From: www.eldonjames.com/frames/stainless.html:316L Stainless Steel is a molybdenum-bearing austentic stainless steel which offers a high stress-to-rupture and tensile strength in elevated temperature environments. It is more resistant to corrosion than type Type 304 and It is also more resistant to pitting. Molybdenum-containing stainless steels are used in the manufacture of certain food and pharmaceutical products where minimizing metallic contamination is desirable. Fittings produced with the 316L alloy perform well in harsh physical environments, maintaining their strength and impact resistance under a wide range of temperatures; however, molybdenum-bearing stainless steel is less resistant than other types of stainless steel to highly oxidizing acids, such a nitric acid. The material has wide application in the dairy industry and is accepted by the Dairy and Food Industries Supply Association-Sanitary Standards Committee. It is approved for preparation and storage of foods by the National sanitation Foundation and is used extensively in the brewery, beverage, and bioprocessing industries. Austenitic Grade Material No. to AISI C Si Mn P S Cr Mo Ni A1 303 0.12 1.0 2.0 0.20 0.15 to 0.35 17.0 to 19.0 0.6 8.0 to 10.0 A2 304 0.08 1.0 2.0 0.05 0.03 17.0 to 20.0 - 8.0 to 13.0 A4 316 0.08 1.0 2.0 0.05 0.03 16.0 to 18.5 2.0 to 3.0 10.0 to 14.4 904L (Annealed): www.assda.asn.au/asp/index.asp?pgid=17971 |
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