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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The treatments are the following: A has a lot of excellent recommendations on general cleaning etc.

ASTM A967 vs. AMS 2700? Which is the right passivation spec?

The standards aetm collectively make up the ASTM A passivation specification ensure that nitric and citric stainless steel passivation is performed properly and with quality results. He passed away May 14, Have the plater do so, and then certify to multiple standards. 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 a697, when you can use the older definition.

You should never ask for “standard passivation” on imports. Ray Kremer Stellar Solutions, Inc.

ASTM A967 Passivation Standard

The ASTM has established certain criterion to achieve consistent product quality in the metal finishing industry. 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.

Regards, Ted Mooney, P. This abstract is a brief summary of the referenced standard.

If you do not specify, they can use whatever they want, even ways that are not in any of the specifications! I was looking at this thread and had this question Precision Machining Technology Show.

Passivation is the overlaying of a substrate or base layer with another metal. In the ASTM A and the nitric acid concentrations mentioned must be percentage by volume of a reagent of 67 wt. Some customers ask for the parts to pass salt spray testing longer than A’s required 2 hours, etc. By meeting standards set by the ASTM and other organizations, we can ensure consistently-high quality for a broad range of metal parts across many industries.


If the part passes the verification test, what differences in function can occur in the part’s use if differing acid baths are used? Jan, Both standards are based heavily on the old QQ-P What requirement or standard is he auditing you against, since clearly it is not A? Is this a correct assessment?

We design our own parts, and do our own passivation in house, and hence prefer the testing requirements of ASTM A AMS exempts C from testing. Method 1 is subdivided into 8 Types corresponding to the types in old QQ-P while Method 2 is not subdivided. A discussion started in but continuing through Q.

You can guess the increase in the amount of testing involved. The “right” spec is the one that your customer requires. The standards of ASTM A provide specific details of the acceptable methods required for passivating stainless steel.

At its basis, the intent of this specification is to ensure that metal finishing shop uses either citric or nitric passivation correctly to produce quality results. Supplier Requirements Privacy Policy Links. March 7, A. Historical Version s – view previous versions of standard. In reading ASTM A a976 AMS it seems that there is quite a bit of overlap but with differences in the bath variables or verification requirements.

Lee Kremer has pointed out that A is not a Specification, only a Practice. For the passivation of stainless steel components, the document for the passivation specification is known as ASTM A As far as the stainless steel passivation process itself, you’re pretty much always going to work your way back to A The chemical reactions of the passivating media on the surface of the stainless wstm shall be stopped by rinsing of the stainless steel part, with or without a separate neutralization treatment.


Ken Vlach – Goleta, California.

Request a Quote Request Info. A renumbers those to 1 through 4 there is no such thing as A Type 6 or 7 while restores the missing four for a total of eight Types.

ASTM A vs. AMS vs. ASTM F86? Which is the right passivation spec?

This is actually an oversight of A that will be corrected in the next revision. It includes recommendations and precautions for descaling, cleaning, and passivation of stainless steel parts. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

ASTM A Standard Passivation Treatment For Stainless Steel

Various organizations and groups present specifications for the processes involved in metal finishing treatments. My customer wants to put A on his print for standard passivation, but my plater tells me that he passivates to A This is applicable all across the globe and replicable by any metal finishing shop. But if a976 a medical instrument or implant, then you’re also going to have to show the appropriate tribute to an F standard.

The intent is to remove any foreign or undesirable traits and improve the corrosion resistance of the stainless steel component.

Ray, Thank you for answering.

From beautiful Pine Beach New Jersey: If you’re having it done for you, the testing is someone else’s problem, so you might consider AMS