Original Posted By: Kevin Southwick
4130 is used for its light weight________________________________________________________________________________
Pietenpol-List: 304SS
Pietenpol-List: 304SS
Original Posted By: David A Jones
Does anyone have any experience with using 304 SS instead of4130? The tensile strength is very near the same and I wouldthink they would polish nicely.________________________________________________________________________________
Does anyone have any experience with using 304 SS instead of4130? The tensile strength is very near the same and I wouldthink they would polish nicely.________________________________________________________________________________
Pietenpol-List: Re: 304SS
Original Posted By: Gary Gower
>Does anyone have any experience with using 304 SS instead of>4130? The tensile strength is very near the same and I would>think they would polish nicely.>>I have, we used it to built my brothers trike, we used TIG welding, here isimposible to get 4130, and 304 SS is found all around.SaludosGary Gower________________________________________________________________________________
>Does anyone have any experience with using 304 SS instead of>4130? The tensile strength is very near the same and I would>think they would polish nicely.>>I have, we used it to built my brothers trike, we used TIG welding, here isimposible to get 4130, and 304 SS is found all around.SaludosGary Gower________________________________________________________________________________
Pietenpol-List: Re: 304SS
Original Posted By: lpasley
>4130 is used for its light weight>>The 304 tubes can be found in all wall thikness, is also very light, I readsomeplace (EAA material) that was the same as 4130, Outside USA is lessexpensive than 4130SaludosGary Gower________________________________________________________________________________
>4130 is used for its light weight>>The 304 tubes can be found in all wall thikness, is also very light, I readsomeplace (EAA material) that was the same as 4130, Outside USA is lessexpensive than 4130SaludosGary Gower________________________________________________________________________________
Pietenpol-List: Re: 304SS
Original Posted By: michael list
Doug Sheets wrote:> > Does anyone have any experience with using 304 SS instead of> 4130? The tensile strength is very near the same and I would> think they would polish nicely.Doug,The bearing strength is probably going to be more important than thetensile strength for the thicknesses used in the Piet fittings. As longas you use at least half hard (Rockwell C41) or better 304 you should beok. The quarter hard and annealed variety will not have the bearingstrength you need for all those Piet strap fittings compared to 4130. 304 is better overall than the 1025 steel that was around in the 30's,and exceeds 4130 from half hard on up in most areas. Weight is the sameas 4130. You can weld 304 but I wouldn't for any major load carryingfittings without thickening up the fitting material as the materialproperties will be degraded to some unknown degree.Mike List________________________________________________________________________________
Doug Sheets wrote:> > Does anyone have any experience with using 304 SS instead of> 4130? The tensile strength is very near the same and I would> think they would polish nicely.Doug,The bearing strength is probably going to be more important than thetensile strength for the thicknesses used in the Piet fittings. As longas you use at least half hard (Rockwell C41) or better 304 you should beok. The quarter hard and annealed variety will not have the bearingstrength you need for all those Piet strap fittings compared to 4130. 304 is better overall than the 1025 steel that was around in the 30's,and exceeds 4130 from half hard on up in most areas. Weight is the sameas 4130. You can weld 304 but I wouldn't for any major load carryingfittings without thickening up the fitting material as the materialproperties will be degraded to some unknown degree.Mike List________________________________________________________________________________
Pietenpol-List: Re: 304SS
Original Posted By: mboynton(at)excite.com
I looked in the Kilsby Roberts tube and pipe stock list. 4130 Cond N tensile90k psi, yield 70k psi, elongation 20% in 2", 4130 annealed trensile 80kpsi, yield 50k psi, elongation 30% in 2", 304 SS annealed tensile 85k psi,yield 35kpsi, elongation 55% in 2", 304 SS 1/8 hard tensile 105k psi, yield75k psi, elongation 20% in 2".If you are going to use 304, I would suggest making sure that it is 1/8hard. The Mil Spec would be Mil. T-6845 seamless or welded and drawnhydraulic. The AMS spec is AMS 5566 seamless or welded and drawn hydraulic.These are tubing specs., I'm not sure about flat sheet stock.michael list wrote:> Doug Sheets wrote:> >> > Does anyone have any experience with using 304 SS instead of> > 4130? The tensile strength is very near the same and I would> > think they would polish nicely.>> Doug,> The bearing strength is probably going to be more important than the> tensile strength for the thicknesses used in the Piet fittings. As long> as you use at least half hard (Rockwell C41) or better 304 you should be> ok. The quarter hard and annealed variety will not have the bearing> strength you need for all those Piet strap fittings compared to 4130.> 304 is better overall than the 1025 steel that was around in the 30's,> and exceeds 4130 from half hard on up in most areas. Weight is the same> as 4130. You can weld 304 but I wouldn't for any major load carrying> fittings without thickening up the fitting material as the material> properties will be degraded to some unknown degree.> Mike List--David B.Schober, CPEInstructor, Aviation MaintenanceFairmont State CollegeNational Aerospace Education CenterRt. 3 Box 13Bridgeport, WV 26330-9503(304) 842-8300________________________________________________________________________________
I looked in the Kilsby Roberts tube and pipe stock list. 4130 Cond N tensile90k psi, yield 70k psi, elongation 20% in 2", 4130 annealed trensile 80kpsi, yield 50k psi, elongation 30% in 2", 304 SS annealed tensile 85k psi,yield 35kpsi, elongation 55% in 2", 304 SS 1/8 hard tensile 105k psi, yield75k psi, elongation 20% in 2".If you are going to use 304, I would suggest making sure that it is 1/8hard. The Mil Spec would be Mil. T-6845 seamless or welded and drawnhydraulic. The AMS spec is AMS 5566 seamless or welded and drawn hydraulic.These are tubing specs., I'm not sure about flat sheet stock.michael list wrote:> Doug Sheets wrote:> >> > Does anyone have any experience with using 304 SS instead of> > 4130? The tensile strength is very near the same and I would> > think they would polish nicely.>> Doug,> The bearing strength is probably going to be more important than the> tensile strength for the thicknesses used in the Piet fittings. As long> as you use at least half hard (Rockwell C41) or better 304 you should be> ok. The quarter hard and annealed variety will not have the bearing> strength you need for all those Piet strap fittings compared to 4130.> 304 is better overall than the 1025 steel that was around in the 30's,> and exceeds 4130 from half hard on up in most areas. Weight is the same> as 4130. You can weld 304 but I wouldn't for any major load carrying> fittings without thickening up the fitting material as the material> properties will be degraded to some unknown degree.> Mike List--David B.Schober, CPEInstructor, Aviation MaintenanceFairmont State CollegeNational Aerospace Education CenterRt. 3 Box 13Bridgeport, WV 26330-9503(304) 842-8300________________________________________________________________________________