AS13572 Questions 1

[jimbod20]

Hello,

I have a spring supplier produce a custom design spring for me.

Material and finish is as follows;
- Material is 17-7PH per AMS 5678.
- Passivate per AMS 2700 method I, type 8.

I have a note on my drawing which states;

"shall conform to SAE-AS13572, Type I Grade A, less centerless ground wire per 3.1.1."

My question is this:
Would the spring manufacturer be required to apply supplementary preservation coating as defined in paragraph 3.4.2? or is the supplementary coating applicable to carbon steel rings only?

J

 

[TVP]

No, the spring should not have a supplementary coating, that pertains only to carbon/alloy steels. 3.4.1 requires passivation of stainless steel springs.