[RBW] Re: Silver Tubing Info

Steel is such great stuff! Using alloys and heat treating you change the properties all over the place. Sometimes overlooked are infinite cycle life and that it work hardens unlike copper and aluminum that work softens, which i try not to think about when riding on 40 year old airplanes and

[RBW] Re: Silver Tubing Info

We have both HT and non-Heat Treated SILVER tubing...and one of my BLAHG posts within the last 5 weeks had an explanation. On the Taiwan frames we use non-HT tubes, which are better (for reasons explained in the post). For the American frames we use HT, because there's a belief (that I don't

Re: [RBW] Re: Silver Tubing Info

Hi John, I understand. Thanks, On Tue, Sep 19, 2017 at 9:19 PM, John Hawrylak wrote: > Lee > > I agree on your compression remarks > > On UTS and Ys, I was only pointing out heat treatment affects both the UTS > and the Ys. So when vendors show increased UTS due to

Re: [RBW] Re: Silver Tubing Info

Lee I agree on your compression remarks On UTS and Ys, I was only pointing out heat treatment affects both the UTS and the Ys. So when vendors show increased UTS due to either heat treatment or a slight change in alloying, or both, the UTS and Ys increase. I think the real question is how

Re: [RBW] Re: Silver Tubing Info

Chris I suggest it is the UTS, the stress where it breaks. TT Versus has a UTS of 110,000 psi (1ksi = 1,000 psi). John Hawrylak Woodstown NJ On Tuesday, September 19, 2017 at 6:39:40 PM UTC-4, Chris Lampe 2 wrote: > Interesting discussion on a topic I know nothing about. My 84 Trek with >

Re: [RBW] Re: Silver Tubing Info

Hi John, Yield strength and UTS is typically fixed in material. If I am understanding what you have written so far, RBW from a liability standpoint would design bicycle frames to not exceed 107 ksi. Any stress past this point would result in a deformed frame although capacity is still there. Also

Re: [RBW] Re: Silver Tubing Info

Interesting discussion on a topic I know nothing about. My 84 Trek with Reynolds 501 ATB tubes has a sticker that says "120,000 PSI Strength" How is that interpreted? Is that enough information to even know anything about it's strength? On Tuesday, September 19, 2017 at 5:29:08 PM

Re: [RBW] Re: Silver Tubing Info

Lee I agree, the yield stress reflects the max for design, you want to keep the stress in the elastic region. Typically Yield increases proportionally as UTS increases, e.g., a Columbus Niobium tube has a UTS = 152 to 167 ksi with a Yield = 107 ksi. The Columbus has a 55% higher yield and

Re: [RBW] Re: Silver Tubing Info

Hi John, I assume the UTS is ultimate tension strength or stress. I would think the bicycle builder or framer would want it to be less than 70ksi (yield strength limit). Once stress exceed the yield strength, it will basically begin to fail due to buckling or plastic hinge effects happen on the

[RBW] Re: Silver Tubing Info

Yes, RBW claims it is heat treated, but the UTS is very close to True Temper Versus (110,000 psi) so the heat treatment is probably for stress relief instead of increasing the UTS John Hawrylak Woodstown NJ On Sunday, September 17, 2017 at 10:36:16 PM UTC-4, Benz, Sunnyvale, CA wrote: > > >

Re: [RBW] Re: Silver Tubing Info

Had no idea steel tubing had a yield strength of 70ksi. Stronger than typical rebar used in concrete buildings. On Mon, Sep 18, 2017 at 10:38 AM, Bob Ehrenbeck wrote: > Here's a photo of the actual tubing sticker that's on my Clem: > > https://flic.kr/p/AKBQJU > > Bob E >

[RBW] Re: Silver Tubing Info

Here's a photo of the actual tubing sticker that's on my Clem: https://flic.kr/p/AKBQJU Bob E Cranford, NJ On Sunday, September 17, 2017 at 4:01:21 PM UTC-4, John Hawrylak wrote: > Does anyone have a link to the RBW Silver Tubing sticker which gives the > mechanical properties of the

[RBW] Re: Silver Tubing Info

On Sunday, September 17, 2017 at 1:01:21 PM UTC-7, John Hawrylak wrote: > > Does anyone have a link to the RBW Silver Tubing sticker which gives the > mechanical properties of the tubing. I seem to recall 110 ksi UTS. I > looked on the RBW site and searched but came up empty. > It's here