The ASTM A passivation standard ensures high quality results for passivated stainless steel. Learn how Able Electropolishing meets these standards. 35A, AMS C, ASTM A and ASTM A standards. Passivation alone will not remove heavy adherent oxide films created from heat treatment. Delstar Metal Finishing offers passivation services that meet the ASTM (American Society for Testing and Materials) A standards. The ASTM A standards.
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I was looking at this thread and had this question These ASTM-approved tests may include: The ASTM A passivation standard applies to the cleaning, passivation and testing of stainless steel parts. Is your business surgical implants, or are you with a passivation shop, or what? Asfm April 30 – May 1 Gain access to the technologies and people in aerospace and defense manufacturing.
FebAnaheim, CA. This auditor you are dealing with, what organization is he with?
ASTM A vs. AMS vs. ASTM F86? Which is the right passivation spec?
The passivated parts shall exhibit a chemically clean surface and shall, on visual inspection, show no etching, pitting, or frosting. And there are other differences. The standards of ASTM A provide specific details of the asm methods required for passivating stainless steel.
Historical Version s – view previous versions of standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.
The ASTM provides instructions and acceptance criteria for these and other tests that can verify the quality of a stainless steel passivation operation. A has a lot of excellent recommendations on general cleaning etc. We appended your question to a thread which should clearly answer it for you: I really appreciate your collaboration.
There are other in-house specifications for some companies. To me this means volume percent of pure nitric acid, resulting in significantly stronger passivation solutions than AMS This specification makes no recommendations regarding the suitability of any grade, treatment, or acceptance criteria for any particular application or class of applications.
Which is the right passivation spec? Method 1 is subdivided into 8 Types corresponding to the types in old QQ-P while Method 2 is not subdivided.
ASTM A967 Passivation Standard
ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. The following tests shall be performed on each lot of stainless steel parts: Ken Vlach – Goleta, California. Able Electropolishing provides metal passivation services that meet the ASTM A standards, as well as other finishing treatments that improve the corrosion resistance of stainless steel and various other alloys. What is standard to you may not be standard to them.
Lee Kremer Stellar Solutions, Inc. The treatments are the following: The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Chemical passivation removes free iron and other surface contaminants from stainless steel parts, improving corrosion resistance. Can you please tell me the differences between the passivation processes AMS [link by ed.
I am struggling to understand which spec to use for passivation. As far as the stainless steel passivation process itself, you’re pretty much always going to work your way back to A AMS exempts C from testing.
John Wilt [returning] – Cambridge, Massachusetts. AMS considers different parts, or the same part made at different times, to be different lots with the exception for parts with the legacy QQ-P called out, when you can use the older definition.
It appears that the types are associated with method 1, not method 2. If so, how could I support that statement? But if it’s a medical instrument or implant, then you’re also going to have to show the appropriate tribute to an F standard. The 3 consensus specifications used at this time, and that should be used for all specifications of passivation are:. He passed away May 14, We design our own parts, and do our own passivation in house, and hence prefer the testing requirements of ASTM A The standards that collectively make up the ASTM A passivation specification ensure that nitric and citric stainless steel passivation is performed properly and with quality results.
Both contain a carryover of QQ-PC with the addition of the more recently developed citric acid based process. Especially in the fastener industry I have seen it is difficult to source a specific product according to a specific type within these standards.
Chemical passivation has as its major goal to provide a layer of protection over the base metal. In simple terms, he’s saying that given 2 SS surfaces which have different concentrations of free iron, the chemical reaction will take longer in the surface with more free iron.
I replied that the parameters are in compliance with standard A but he’s telling that we don’t have objective evidence to support the validation since A defines minimum requirements that could be insufficient to my process. A chemical treatment shall be applied which will accelerate the formation of the passive film on a chemically clean stainless steel surface.
The best thing do to is ask the customer what they expect. These ASTM-approved tests may include:. These tests include the following practices: Stainless Steel Passivation and More Able Electropolishing provides metal passivation services that meet the ASTM A standards, as well as other finishing treatments that improve the corrosion resistance of stainless steel and various other alloys.
QQ-PB contained six nitric acid bath Types. Based on the previous information, the concern is regarding the minimum requirements in A For the passivation of stainless steel components, the document for the passivation specification is known as ASTM A Is there any clear direction or is it optional?