No passwords, No popups, No AI, No cost:
we earn from affiliate purchases

Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Adver-
tise
Help
Wanted
Current
Q&A's
Site 🔍
Search
ted_yosem
Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
finishing.com -- The Home Page of the Finishing Industry

  The authoritative public forum
  for Metal Finishing since 1989
  mfhotline


  -----

ASTM B700, Type II, Grade D, Class N

Q. We have an old customer spec. that calls out Class "J" in ASTM B700, Type II, Grade D. We have been told that Class "N" is the current revision. What is the difference between Class "J" and Class "N"? It is a silver plating over a copper flash.

Dann-O
QC Supervisor - Tyrone Pennsylvania
October 31, 2024

Ed. note: Many readers use their real names because they enjoy the camaraderie of being part of this community; they may be less likely to engage with those who won't.

A. Dann-o,
From what I can find, the current (2020) copy of B700 contains "Supplementary Surface Treatments" Classes N, S, and T. The 1997 and 2008 versions had only N and S. Presumably some version, even older still, might have the Class J.

ASTM's site doesn't seem to have copies older than the 1997. Presumably your customer had one at some point and may be able to supply you with it, or ask if they would designate a Class in the current revision as a substitute.

ray kremer
Ray Kremer
Stellar Solutions, Inc.
supporting advertiser
McHenry, Illinois
stellar solutions banner




(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

Finishing
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g,
& Software


About/Contact  -  Privacy Policy  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"