Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: GRoberts
  • Content: Threads
  • Order by date
  1. GRoberts

    Industires or improvement

    Which of the following industries would you persue in the welding/materials field and why? 1. Power Generation (fossil) 2. Nuclear 3. Oil & Gas 4. Aerospace 5. Consulting 6. Other Also, which do you think would add more value to an Welding engineer looking to move to one of the above...
  2. GRoberts

    Career direction

    I've been an engineer in the welding field for about 13 years now. Most of it has been in a production support roll. I am working at a decent job now, but the longer I'm in the production support role, the more it seems to be getting mundane. I'm sure my employer doesn't see it this way, but...
  3. GRoberts

    304M4

    Does anybody have any idea what 304M4 is? Google searches seem to mostly come up with Asian companies offering wire. We apparently have a fastner supplier where the MTR is saying the rod is 304M4. I can't find any ASTM related designations so far.
  4. GRoberts

    electroless nickel plated bushing

    Would a steel shaft and bushing (with grease) that are both electoless nickel plated have a tendency to gall? I'd prefer to plate both parts to increase the hardness and hopefully reduce wear on both of them, but if galling is a problem, I can do one part only.
  5. GRoberts

    RP582

    Does anyone know when the new revision of API RP582 is coming out? I heard about a new draft version some time ago, but haven't seen anything yet.
  6. GRoberts

    NACE/ISO 15156

    Is it just me, or is there a little bit of a disconnect in the new NACE/ISO document? It specifies a HRC 22 maximum, and then specifies testing to be done with HV10 or HV5. Then of course, it does not provide a conversion table. I normally use A370 to convert HV10 for non-austenitic steels...
  7. GRoberts

    E71T-1 toughness

    We have had fairly good luck with the particular brand of E71T-1 FCAW wire we use when testing CVNs at -50F after 1125F PWHT. Recently one of our customers specified an 1175F minimum PWHT temperature. After 1175F, the CVNs did rather poorly at -50F. (We also tested E7018-1 in parallel, and of...
  8. GRoberts

    X65 pipe

    Starting a new weld test on X65 pipe, but don't have API 5L specification. What is the elongation requirement? Is the elongation of X65 20% or greater so that 3/8" thick bends are required? Thanks
  9. GRoberts

    Flame straightening

    Does ASME address flame straightening anywhere?
  10. GRoberts

    AWS D1.6

    Does the D1.6 structural stainles steel welding code address the welding of precipitation hardening stainless? If not, does anyone know of other codes that might? Thanks
  11. GRoberts

    ER410NiMo impact properties

    Has anybody tested this type of material with CVNs at or near 0F (-18C). We are needing 50 ft-lb and our standard FCAW and SMAW electrodes don't usually make it even at room temperature. 40-45 ft-lb would be typical. I was looking at GMAW since the CVNs are usually better than FCAW or SMAW...
  12. GRoberts

    Hydrotest cap evaluation

    We are manufacturing fittings which have to be hydrotested. On previous projects, our customer has specified to use A234 WPB weld on pipe caps with a 40 ksi min yield. The fitting we were manufacturing had either a 36 or 50 ksi yeild, but on the most recent project, the yield strength of the...
  13. GRoberts

    Hardness estimation

    Is there a good way to estimate (or calculate)expected hardness given a metals chemical composition based on tempering temperature? For instance, if a weld has a hardness of 225 HV10 after a 1125F PWHT, can the hardness after a 1150F PWHT be calculated? Are there ways other than the...
  14. GRoberts

    Calculating transition temperatures

    I don't know for sure where the equations came from, but the ones we have apparently used here for a while that seem to work good on a variety of steel alloys are: (temperature in F) Ac1 = 1333+40Si-25Mn-26Ni+42Cr Ac3 = 1570-323C-25Nn+80Si-32Ni-3Cr Ms = 1042-853C-60Mn-30Cr-30Ni-38Mo Mf = Ms-483...
  15. GRoberts

    415 stainless plate

    Does anyone know if type 415 stainless plate is available anywhere. (this is the wrought version of CA6NM castings) I don't know of anyone that can supply this material so far.
  16. GRoberts

    Effect of cold work on toughness

    In general, on low alloy steels, (API 2Y gr. 50 for instance), what is the effect of cold work on toughness. If for example you cold bend a plate and strain the outer fiber 5-10%, how would CVN tests compare to unstrained plate?
  17. GRoberts

    Strain age embrittlement

    Has anyone experience strain-age embrittlement on thick plates (3" (75mm)or greater) in the HAZ? No cold working was done on our plates, so it would all have to come from the welding. We are trying to determine if this is a possible cause of low HAZ tougness values for some testing we are...
  18. GRoberts

    Strain age embrittlement

    Has anyone experience strain-age embrittlement on thick plates (3" (75mm)or greater) in the HAZ? No cold working was done on our plates, so it would all have to come from the welding. We are trying to determine if this is a possible cause of low HAZ tougness values for some testing we are...
  19. GRoberts

    crevice corrosion testing of duplex to G78

    Has anyone done crevice corrosion testing on duplex sst S32550 (25Cr, 5Ni, 3.5 Mo, .2 N, 2 Cu) or similar with welds in the as welded condition? We have not gotten good results in the HAZ in ASTM G48 method A tests unless solution annealed, but have never done crevice corrosion or chloride...
  20. GRoberts

    Section VIII UG-84(h)(3)

    For materials requiring impact testing, there seem to be two interpretations, which one is correct? I hadn't heard of one of these interpretations until yesterday but I won't say which one as to not skew the question. 1. Since the paragraph says "When proceedure tests are made on material...

Part and Inventory Search

Back
Top