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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It’s not possible to diagnose a finishing problem or the hazards of an operation via these pages.

Regards, Ted Mooney, P. AMS exempts C from testing. In reading ASTM A and AMS it seems that there is quite a bit of overlap but with differences in the bath variables or verification requirements.

ASTM A967 Passivation Standard

ASTM A renumbered those to nitric 1 through 4, while AMS brought back the ones that had been removed and has types 1 through 8. 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: John Wilt [returning] – Cambridge, Massachusetts.


The passivated parts shall exhibit a chemically clean surface and shall, on visual inspection, show no etching, pitting, or frosting.

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They also are very specific on such aspects as recommendations and precautions for such things as cleaning, descaling and tests.

A is a standard covering treatments to passivate stainless steel regardless of what it will be used for and then test methods to show that it was passivated. May 15 — 16, Boston, MA.

ASTM A – 01 Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts

October 23, A. Historical Version s – view previous versions of standard. I am struggling to understand which aastm to use for passivation. In the ASTM A and the nitric acid concentrations mentioned must be percentage by volume of a reagent of 67 wt.

ASTM A Standard Passivation Treatment For Stainless Steel

Precision Machining Technology Show. AMS [link by ed. Method 1 is subdivided into 8 Types corresponding to the types in old QQ-P while Method 2 is not subdivided. March 7, A. ASTM A [link by ed.

Copper sulfate testing Damp Cloth Test High humidity testing Potassium Ferricyanide—Nitric Acid Test Salt spray testing Water immersion testing The instructions for conducting such tests as well as the acceptable results are also provided. But again, please describe your situation. Combining values from the two systems may result in non-conformance with the standard.


These W967 tests may include: Request a Quote Request Info. The ASTM has established certain criterion to achieve consistent product quality in the metal finishing industry.

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

These tests include the following practices: Indeed also my conclusion is that it is an omission. The approach involves several steps.

Since you’re considering an AMS spec, I assume you have aerospace customers. What is standard to you may not be standard to them. Chemical passivation removes free iron and other surface contaminants from stainless steel astn, improving corrosion resistance.

My customer wants to put A on his print for standard passivation, but my plater tells me that he passivates to A