I am trying to justify the use of 4000 series steels in the hot rolled Quenched and Tempered, either 4140 or 4340, in our high pressure (P>40 ksi) product. The product does not have to meet ASME div 3, although we often refer to the code for best practice. I know the the 4000 series is...
I'm looking for a theoretical treatement of bolt group analysis. I have seen allot of examples / theory on off axis shearing forces on a bolt group, although I am looking for an analysis where you would have a bolt group and you pull on it in tension eccentrically, and then calculate the...
I have a question...
A weld symbol for a T joint between equal thickness plates shows a bevel weld above the line and below the line (double bevel weld). No bevel size or angle is shown. In the tail of the symbol is the word "BACKGOUGE".
How is this interpereted per AWS D1.1, in terms of the...
The pin is to connect a diagonal brace that contains a viscous damper for seismic protection to an adjoining structure. In reality the pin would be loaded to its design limit maybe a total of 20 cycles in its lifetime. Typically after a major seismic event, the damper and connecting hardware is...
Hello All,
I have a multitude of calculations for clevis pins, from the complex which produce conservative results, to the plain where you just calc shear and bending (less conservative results). I'm always getting into issues with customers and other engineers where the size of our pin has to...
Edstainless,
Thank you for your reply. Do you know where in ASTM it states minor elements that are not listed in the spec are outside the scope of the spec?
Is it in ASTM A1040, Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Carbon, Low-Alloy, and Alloy Steels...
I am trying to find a certified material test report for ASTM A519 seamless mechanical tubing AISI 4140 that has no ambiguities with the requirements of the ASTM A519 spec. I have looked through a number of CMTR's I have on hand, and they all list additional elements above and beyond what is...
I'm looking for some material that goes over lifting lug calculations. I have ASME BTH-1, although the material only covers if the load is perpendicular to the radius of the lug. My application has the load applied at an angle between 0 deg and 90 deg (covered in ASME BTH-1).
Can anyone point...
I'm looking for an official source for the material properties of carbon steel 12L14. It is covered by ASTM A108 and ASTM A29, although neither spec. provides mechanical properties. I see allot of companies publish mechanical properties for this material, but where do they get them? I want an...
I am trying to weld 4140 to 4140 and then heat treat to achieve 120 ksi yield of the base metal as well as the weld metal. I'm not a welding engineer, therefore I am looking for a pre-qualified procedure or method which lays out how to do this. I have been working with AWS D1.1 although in para...
I'm working with a shear thinning fluid and I am trying to predict the effects of reducing apparent viscosity on the flow through sharp edged orifices and valves. The theoretical models I have seen do not include any reference to viscosity and therefore make it quite difficult to predict the...
I'm not certain on the cathodic protection. The equipment is being mounted to a turret structure of an FPSO and we are just sub suppliers. I could ask my customer whether the turret structure is protected. Could you lend me some insight on the difference in bolt selection based on whether the...
I am specifying some bolting for a submersible application, the bolts will be submerged about 2 to 3 days then unsubmerged for a couple of weeks. I need 1.5" bolts with a proof strength of no less then 87 KSI. They will only be removed and installed when the equipment is serviced (on the order...
I have a spacer being clamped between a nut and bolt. The length is quite short so buckling isn't a concern. The ID id fixed at .79" how thick (pick the OD and area) do I need to make it to withstand the preload about 24,000 lb and an external compressive load of 8,500 lb. I don't think just...
