Rocker gas tank... Stainless???
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Joined: Jul 2008
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From: El Paso, Tx (temp)
Rocker gas tank... Stainless???
Can anyone tell me for a fact if the Rocker gas tank outer skin is made of stainless. I've taken mine off and pulled all the guts out to have it painted and fill over the indention on the side where the Harley emblem is. I've welded a tank lift on it but the metal skin looks like stainless. I have stuck a magnet on it and it sticks but that could be due to the inner tank being steel. This I'm pretty sure of due to the thickness of the inner liner. It seems as if Harley use stainless covers on the outside of the tank for some reason.
I just wanna find out before my paint guy goes to welding on it. I told him to grind down a spot and smear some salt water over it and check it tomorrow morning to see if it has corroded. He's going to do the same to the front fender since we know it's steel and let that be the base for the test. The outter skin on the rear fender is stainless for sure since I've had the holes smoothed over by a professional welder here in town.
Last... I just found some stainless wire for a MIG welder... had I known there was stainless wire for a MIG I would've welded it myself!!!! Gotta get me some of that for future uses..... you never know...
Thanks for any help guys,
Hispeed
I just wanna find out before my paint guy goes to welding on it. I told him to grind down a spot and smear some salt water over it and check it tomorrow morning to see if it has corroded. He's going to do the same to the front fender since we know it's steel and let that be the base for the test. The outter skin on the rear fender is stainless for sure since I've had the holes smoothed over by a professional welder here in town.
Last... I just found some stainless wire for a MIG welder... had I known there was stainless wire for a MIG I would've welded it myself!!!! Gotta get me some of that for future uses..... you never know...
Thanks for any help guys,
Hispeed
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Joined: May 2007
Posts: 145,895
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From: 40 miles Northeast of Indy..
They made a stainless steel that a magnet will stick to...
How are stainless steels classified?
The three major classes of stainless steel are:
♦ Austenitic: Chromium-nickel-iron alloys with 16-26% chromium, 6-22% nickel (Ni), and low carbon content, with non-magnetic properties (if annealed - working it at low temperatures, then heated and cooled). Nickel increases corrosion resistance. Hardenable by cold-working (worked at low temperatures) as well as tempering (heated then cooled). Type 304 (S30400) or "18/8" (18% chromium 8% nickel), is the most commonly used grade or composition.
♦ Martensitic: Chromium-iron alloys with 10.5-17% chromium and carefully controlled carbon content, hardenable by quenching (quickly cooled in water or oil) and tempering (heated then cooled). It has magnetic properties. Commonly used in knives. Martensitic grades are strong and hard, but are brittle and difficult to form and weld. Type 420 (S42000) is a typical example.
♦ Ferritic: Chromium-iron alloys with 17-27% chromium and low carbon content, with magnetic properties. Cooking utensils made of this type contain the higher chromium levels. Type 430 is the most commonly used ferritic.
Two additional classes worth mentioning include Duplex (with austenitic and ferritic structures), and Precipitation Hardening stainless steel, used in certain extreme conditions.
How are stainless steels classified?
The three major classes of stainless steel are:
♦ Austenitic: Chromium-nickel-iron alloys with 16-26% chromium, 6-22% nickel (Ni), and low carbon content, with non-magnetic properties (if annealed - working it at low temperatures, then heated and cooled). Nickel increases corrosion resistance. Hardenable by cold-working (worked at low temperatures) as well as tempering (heated then cooled). Type 304 (S30400) or "18/8" (18% chromium 8% nickel), is the most commonly used grade or composition.
♦ Martensitic: Chromium-iron alloys with 10.5-17% chromium and carefully controlled carbon content, hardenable by quenching (quickly cooled in water or oil) and tempering (heated then cooled). It has magnetic properties. Commonly used in knives. Martensitic grades are strong and hard, but are brittle and difficult to form and weld. Type 420 (S42000) is a typical example.
♦ Ferritic: Chromium-iron alloys with 17-27% chromium and low carbon content, with magnetic properties. Cooking utensils made of this type contain the higher chromium levels. Type 430 is the most commonly used ferritic.
Two additional classes worth mentioning include Duplex (with austenitic and ferritic structures), and Precipitation Hardening stainless steel, used in certain extreme conditions.
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djpullen
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