Re: [MW:7373] Re: Material for Boiler Diffuser (Impellers)

Hi, HR-3 is a british standard nickel alloy,i.e BS HR-3.its a Nimonic alloy 105. NIMONIC® alloy 105 Ni 54.0, Co 20.0, Cr 15.0, Mo 5.0, Al 4.7, Ti 1.3 An age-hardenable superalloy with increased aluminum for improved oxidation-resistance and strength, and high creep-rupture properties up to around 1740°F (950°C). Equivalent material: SRDRW DIN 1614 BS 1448 HR2/HR3 ASTM A 570, ASTM A621 JIS G 3131 SPHD IS 1079 D/DD/EDD Thanks & Regards,   (Karthik) Karthikeyan.S QA/QC Manager Getabec Energy Co.,Ltd. 379,Moo6,Soi8,Nikhomphatana, Rayong-21180, Thailand. Phone: 0066 38 897035-8 (Off) Fax: 0066 38 897034 Hand Phone: 0066 892512282 --- On Tue, 10/5/10, hpi001 <pieper-qsi@kpnmail.nl> wrote: From: hpi001 <pieper-qsi@kpnmail.nl> Subject: [MW:7371] Re: Material for Boiler Diffuser (Impellers) To: "Materials & Welding" <materials-welding@googlegroups.com> Date: Tuesday, October 5, 2010, 2:09 PM Dear Mr. Ali, There is a so called white cast Iron called HR, I don't know if this is the material used in your boiler but this material is similar to ASTM A319 Class D and application area of this material is for non pressure containing parts at elevated temperatures so in my opinion should be suitable for your application. There is also mentioned a class III (could be 3 of your drawing). Best Regards Herman Pieper On 5 okt, 07:49, "M. Ali" <mali5...@gmail.com> wrote: > Dear All, > > We have in our facility, 3 boilers. All of them have dual combustion > burners. > These boilers were manufactured by Babcock and Wilcox in 1962 and much > of the paperwork regarding its construction and materials is now no > longer available either to us or somewhere else. > Coming back to the burners, diffuser plates (or impellers) are used > for mixing and having an evenly distributed flame. The material for > these plates in drawings is (HR -3), I do not understand what it > means. The maintenance department had been using cast iron but it > doesnt hold long enough. > Please, if you know, share the meaning of the term H.R.3 or you might > also indicate subsitute castable material. > > Thanks and Regards, > > Muhammad Ali -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.