ASME SECTION VIII, DIV. 1 UCS 66(c)
ASME SECTION VIII, DIV. 1 UCS 66(c)
(OP)
FERRITIC STEEL flanges for use at MDMT not colder than minus 20 degree F could be exempted from impact testing by paragraph UCS-66(c) of ASME code Section VIII, Div 1.
Can someone help me with a definition of “ferritic Steel” according to the ASME code.? Can SA 105 be considered ferrict Steel?.
To complete the picture, I am not talking about ferritic stainless steel. The UCS-66(c) belong to part UCS: Carbon and Low Alloy Steel of the ASME code Section VIII, Div. 1.
Thanks in advance for he usual support.
Mac10
Can someone help me with a definition of “ferritic Steel” according to the ASME code.? Can SA 105 be considered ferrict Steel?.
To complete the picture, I am not talking about ferritic stainless steel. The UCS-66(c) belong to part UCS: Carbon and Low Alloy Steel of the ASME code Section VIII, Div. 1.
Thanks in advance for he usual support.
Mac10





RE: ASME SECTION VIII, DIV. 1 UCS 66(c)
Yes. Reviewing ASME B16.5, SA 105 is listed in Table 1A of Material Specifications, therefore it would be exempt from testing at service temperatures warmer than -20 deg F, per UCS 66 paragraph c. The ferritic in this sense is applicable to the list of iron base materials in Table 1A of ASME B16.5.
It does seem confusing at times with various code committees designating specific classifications, but how I deal with this is use the code books like a road map. You start at point A and proceed to the next path including following the necessary reference documents, if applicable.
RE: ASME SECTION VIII, DIV. 1 UCS 66(c)
I Could not agree with your argument that since SA 105 is listed on Table A1 of B16.5 can be considered a Ferritic Steel. Why?. Because, following this argument we may also conclude that SA 182 Gr. F316L (which is also listed on table A1) is a ferritic Steel, and we know that SA 182 Gr. F316L is austenitic.
As far as I know SA 105 is included in curve B, of Fig. UCS-66, from which you could obtain the MDMT for impact testing exemption. However, I know people that thinks that SA 105 can be included in USC-66(c), of course I do not agree with them.
RE: ASME SECTION VIII, DIV. 1 UCS 66(c)
RE: ASME SECTION VIII, DIV. 1 UCS 66(c)
Interpretation: Vlll-1-92-63
File: Question: Are ANSI B16.5 steel flanges made of SA-105 material considered tabe “ferritic”
as they would apply under the requirements of UCS-66(c) in Section VIII, Division l?
Reply Yes.
RE: ASME SECTION VIII, DIV. 1 UCS 66(c)
Thanks;This was the type of answer I was hoping for.
Metengr, Thanks for your comments too.
Mac10
RE: ASME SECTION VIII, DIV. 1 UCS 66(c)
Steve Braune
Tank Industry Consultants
www.tankindustry.com
RE: ASME SECTION VIII, DIV. 1 UCS 66(c)
RE: ASME SECTION VIII, DIV. 1 UCS 66(c)
1. ASME Sec. VIII Div.1
(1) Ferrous Metal/Steel: N.S
(2) Ferritic Steel:
- Part UHT: weldable CS or LAS which tensile properties have been enhanced by HT
- UCS-66(c): CS & LAS
2. ASME Sec. II
(1) Ferrous Metal: Metal with Fe >/ 50wt%
(2) Ferritic Steel: N.S
3. ASME B16.5
(1) Ferrous Metal/Steel: N.S
(2) Ferritic Steel: N.S
4. ASME B31.3
(1) Ferrous Metal/Steel: N.S
(2) Ferritic Steel: Table E323.22 [LAS, FSS, MSS]
5. ASTM
(1) Ferrous Metal: Metal with Fe >/ 50wt%
(2) Ferritic Steel: N.S
6. Metal Handbook, Vol.1-1990, p617, 936
(1) Ferrous Metal/Steel: N.S
(2) Ferritic Steel: CS & LAS
7. www.thefreedictionary.com
(1) Ferrous Metal : Metal relating or containing iron
(2) Ferritic Steel: A steels as a solid solution in which alpha iron is the solvent [e.g., CS, LAS, FSS, MSS]
8. Best definition/interpretation in ASME and Its Interpretations for Pressure Vessels [by Thomas Eun]
(1) Ferrous Metal : Metal with Fe >/ 50wt%
(2) Ferritic Steel: A CS or LAS as a solid solution in which alpha iron is the solvent [e.g., CS, LAS]
(3) Ferritic Stainless Steel: [FSS]
(4) Martensitic Stainless Steel: [MSS]
[Abbreviation]
N.S: Not specified
CS: Carbon Steels
LAS: Low Alloy Steels
HT: Heat Treatment
wt: Weight
FSS: Ferritic Stainless Steels [BCC structure]
MSS: Martensitic Stainless Steels [BCT structure]
Hope this helps,
Thomas Eun
RE: ASME SECTION VIII, DIV. 1 UCS 66(c)
RE: ASME SECTION VIII, DIV. 1 UCS 66(c)