Aug 8, 2006 · The 416 stainless steel material, supplied quench and tempered (heat treatment condition) to about 25-27 HRc should provide adequate strength and toughness for this application. We have numerous pump shafts that have been specified with this material and heat treatment condition.

May 16, 2002 · Self mating is a poor practice, in stainless it is a disaster. At the low loads that are possible with stainless the friction factors will not vary a lot based on material. Values in the range of 0.4-0.5 will almost always fit.

Aug 18, 2001 · A slab gate (in a dam outlet) is guided by bronze guide plates sliding on stainless steel guides. The gate jerks when it is operated, and I suspect this is caused by galling between the two materials. Does anyone have any suggestions on what material to use in stead of bronze. The contact pressure is about 20 MPa and the relative movement is slow.

Dec 31, 2002 · How should I call out 316L stainless steel and passivation on a drawing? Right now I have Material 316L Stainless Steel and the thickness, Finish: Passivate. Are there military or other specifications that would quarantee material and finish quality? I have heard of 316 marine grade stainless steel. What is the difference in the marine grade ...

Jan 27, 2012 · I sometimes specify using 18-8 stainless as a material callout where an exact SS is not necessary and I want to give the vendor/machinist options for using material in stock, especially for small qty orders. I realize some of the 18-8's are not as preferred for machining but doable. My logic is...

Jan 31, 2011 · In the coupling of #43- Stainless steel 17-7PH (active) and #56 Red Brass the 17-7PH is more anodic. Where as in the coupling of #56 Red Brass and #69 Stainless steel 17-7PH (passive) the Red Brass is more anodic. I took/am taking the meaning of 'passive' in the chart to mean 'passivated.'

Dec 17, 2014 · Could some one give me an insight as to what is the difference between "SS & SST" in terms of stainless steel material ie 416 SS & 416 SST. My first instinct was that they were the same both SS and SST stands for stainless steel, just written in a fancy manner. I may be wrong. If you feel so...

Feb 13, 2011 · I will be pumping 3 different fluids, portable water, 1-10% Sodium Chloride brine and 1% Sodium Carbonate Alkaline (pH ~ 11) fluids. What material is best to use for the pump Aluminum-Bronze or 316 Stainless Steel? My main problem is iron (Fe2+ and Fe3+), basically rust is getting into my fluid stream from our current carbon steel pumps.

Jun 28, 2017 · as per ASME code, austenitic stainless steel should not normally be post weld heat treated at 600-700°C because this can lead to dimensionnal variations and loss of mechanical properties and corrosion resistance (precipitation of harmful intermetallic phases, sigma phase embrittlement, 475C embrittlement, sensitization by chromium carbide ...

May 18, 2004 · Stainless steel nuts/bolts/studs expand much more that carbon steel for a give temperature change. (the expansion coefficent is about ~40% larger) I believe it is this additional expansion that causes the loosening. Carbon steel bolts/nuts do not expand as much, hence would not see this problem when installed on SS flanges. MJC