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| 100 Year Old Boiler Plate
https://www.rypn.org/forums/viewtopic.php?f=1&t=10038 |
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| Author: | G. Mark Ray - TVRM [ Fri Jun 18, 2004 3:57 pm ] |
| Post subject: | 100 Year Old Boiler Plate |
I have some interesting numbers to pass along to everyone. Last week, myself and another engineer spent a few minutes with a Tinius Olson machine breaking test coupons. These coupons were from a section of plate that was cut out of Locomotive 630's boiler as part of the repair work we are doing. Before I get into the results, let me provide a little background on this plate. According to Southern Railway Specification E1a for locomotives 601 thru 661, the plates are made of open hearth steel meeting the Southern Railway specification "Firebox Plates - Carbon Steel" dated May 12, 1899. We have the complete mechancial file for this locomotive which contains all the alteration reports filed with the ICC during its life. None of these reports list the 1st boiler course as being replaced. We made four test coupons for this testing. Two for the longitudinal direction and two for the circumferential direction. As I stated earlier, all samples were tested to failure. An extensiometer was applied to the test coupons to measure strains. The coupons were also marked to check elongation. Tensile strengths of the plate were as follows: Longitudinal 1 = 61.4 ksi Longitudinal 2 = 60.8 ksi Circumferential 1 = 60.5 ksi Circumferential 2 = 59.1 ksi The percent elongations were: Longitudinal 1 = 37.6% Longitudinal 2 = 35.8% Circumferential 1 = 32.0% Circumferential 2 = 33.4% No discontinuities in the original boiler plate were noted during the testing. A chemical analysis of the plate was also performed: Carbon = 0.18% Manganese = 0.37% Copper = 0.20% Plus traces of Silicon, Phosphorus, Lead and Tungsten. We were very pleased with these results. It also shows that even after 100 years (and this locomotive was in continuous service from 1904 to around 1967), the plate is still in good condition. This is probably due to a boiler course only being loaded in tension (and with stress levels low enough for infinite stress cycles) as opposed to a firebox knuckle which is subjected to bending stresses. I just wanted to share this everyone. G. Mark - TVRM Look at our Revamped Website aw90@comcast.net |
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| Author: | John Craft [ Fri Jun 18, 2004 4:28 pm ] |
| Post subject: | Re: question |
> We have the complete mechancial file > for this locomotive which contains all the > alteration reports filed with the ICC during > its life. None of these reports list the 1st > boiler course as being replaced. 'We think of, say, 630, as being pure 1904. The Pegram Pragmatist* knows better. How much of the original 2-8-0 is there now? "The frames," he replies. "And the wheel centers. Maybe a boiler course." The man who replaced flues and tires; who understands the ravages of expansion and contraction, rust and scale, fissures and wear - he knows.' David P. Morgan, "Master Mechanic - Steam Engines" (TRAINS magazine, September 1976, pp. 27-32) How close was the boss, Mark? JAC * - Bill Purdie, of course. And if ANYONE posts "who's Bill Purdie?" I'll scream. |
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| Author: | GARY GRAY [ Fri Jun 18, 2004 4:59 pm ] |
| Post subject: | Re: question |
> 'We think of, say, 630, as being pure 1904. > The Pegram Pragmatist* knows better. How > much of the original 2-8-0 is there now? > "The frames," he replies. > "And the wheel centers. Maybe a boiler > course." The man who replaced flues and > tires; who understands the ravages of > expansion and contraction, rust and scale, > fissures and wear - he knows.' > David P. Morgan, "Master Mechanic - > Steam Engines" (TRAINS magazine, > September 1976, pp. 27-32) > How close was the boss, Mark? > JAC > * - Bill Purdie, of course. And if ANYONE > posts "who's Bill Purdie?" I'll > scream. I have an autographed copy of that issue of Trains. To anyone who was involved with or around the Southen Steam Program, Mr Purdie will always be "The Boss". Bruce who? |
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| Author: | G. Mark Ray - TVRM [ Fri Jun 18, 2004 9:00 pm ] |
| Post subject: | Re: question |
Interesting question JAC and one that we are always discussing. All the boiler courses, steam dome, dry pipe, 18 of the 19 boiler braces, wrapper sheets and backhead are of 1904 vintage. Portions of the frame from the #1 driver back are original. Items that we know are NOT original include - Cylinder Saddle (third set. 1st was original set with slide valves, 2nd was 22" cylinder bore with piston valves, current set is 24" cylinder bore) Valve Gear (Stephenson Gear was original) Driving Wheels (Built with 56" wheels, changed to 57" wheels when it became a Ks-1) Tube Sheets (original saturated steamer) Spring Rigging Brake Rigging Rods Air Compressor Firedoors and probably a bunch of the rest of it. The Boss was purdie close. G. Mark Updates constantly at our website! aw90@comcast.net |
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| Author: | buddy bob [ Fri Jun 18, 2004 10:48 pm ] |
| Post subject: | Re: question |
> Interesting question JAC and one that we are > always discussing. > All the boiler courses, steam dome, dry > pipe, 18 of the 19 boiler braces, wrapper > sheets and backhead are of 1904 vintage. > Portions of the frame from the #1 driver > back are original. Items that we know are > NOT original include - > Cylinder Saddle (third set. 1st was original > set with slide valves, 2nd was 22" > cylinder bore with piston valves, current > set is 24" cylinder bore) > Valve Gear (Stephenson Gear was original) > Driving Wheels (Built with 56" wheels, > changed to 57" wheels when it became a > Ks-1) > Tube Sheets (original saturated steamer) > Spring Rigging > Brake Rigging > Rods > Air Compressor > Firedoors > and probably a bunch of the rest of it. > The Boss was purdie close. > G. Mark I noted the very low mang. Please advise was the elongations for 2" or 8". thanks bb |
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| Author: | G. Mark Ray - TVRM [ Sat Jun 19, 2004 7:14 am ] |
| Post subject: | Re: question |
Elongation was for 2". Chemical analysis matches up with ASTM A30 but A30 did not exist in 1899. This includes the percent of magnanese. G. Mark Updates constantly at our website! aw90@comcast.net |
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