stainless

[julio_gyn 0]

Hi, anyone knows what grade is the SS used in skydiving gear?

Julio Cesar
blue skies

[JerryBaumchen 1,048]

Hi julio,

Try these guys:

http://www.bourdonforge.com/

http://airsportsllc.com/parachute/

http://www.wichardamerica.com/

Then let us know what you find out,

JerryBaumchen

[julio_gyn 0]

JerryBaumchen

Hi julio,

Try these guys:

http://www.bourdonforge.com/

http://airsportsllc.com/parachute/

http://www.wichardamerica.com/

Then let us know what you find out,

JerryBaumchen

Thanks Jerry, its 316 cold forged... its simple process to form the shapes, big press, good tool and a big BANG!

Julio Cesar
blue skies

[erdnarob 1]

Hi Jerry. Those manufacturers do not provide the type of alloy used for parachute and aviation purposes nor the heat treatment the metal is getting.
There are many many type of stainless steels. There is the 18/8 for kitchen accessories (18% of chrome, 8% of nickel) for instance but there is the surgical SS, the cutlery SS...etc

Learn from others mistakes, you will never live long enough to make them all.

[JerryBaumchen 1,048]

Hi Andre',

Quote

Those manufacturers do not provide the type of alloy used for parachute and aviation purposes

Well, one can only try.

Does not surprise me that they would consider it proprietary information.

JerryBaumchen

PS) One could always take a piece of s/s hardware and have it analyzed, if one really, really wanted to know.

[BIGUN 1,053]

On each of their sites is a "Contact US" tab.

I know it requires one more click and an email, but maybe if you did one per day; it wouldn't be such a burden.

Nobody has time to listen; because they're desperately chasing the need of being heard.

[adamUK 3]

I've got a rig turning up in a couple of months. I'll get it analysed.

[erdnarob 1]

Here we go about SS grade for skydiving equipment.

«««17-4 PH SS offered by Best Stainless is under high quality standards including: UNS S17400, AMS 5643, ASTM A564, and ASTM A693 Grade 630. 17-4 PH stainless steel can be used for a variety of applications including: pump shafts, oil path, mechanical seals, and within the aerospace industry. Its composition is carbon, chromium, columbian + tantalum, copper, manganese, nickel, phosphorous, silicon, and sulfur.»»»

note : PH stands for Precipitation Hardening = a kind of heat treatment

My Laguiole knife has a SS named T12 specially designed for cuttlery. It keeps the cutting edge sharp longer and it's relatively easy to sharpen.

One ss for each use.

Learn from others mistakes, you will never live long enough to make them all.