Nickel 200/201

Both Nickel 200 and 201 offer corrosion resistance in reducing and neutral media as well as in oxidizing atmospheres provided that the oxidizing media allows the formation of a passive oxide film. This oxide film accounts for the materials excellent resistance in caustic environments. Corrosion rates in both marine and rural atmospheres are very low. The resistance of Nickel 200/201 to corrosion by distilled and natural waters is excellent. Plus it also gives excellent service in flowing sea water even at high velocity, but in stagnant or very low-velocity sea water severe local attack may occur under fouling organisms or other deposits. In hot water systems where the steam contains carbon dioxide and air in certain proportions, corrosion rates will be initially high but will decrease with time if conditions favor the formation of a protective film.

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Nickel 200 is normally limited to service at temperatures below 600° F. At higher temperatures Nickel 200 products can suffer from graphitization which can result in severely compromised properties. When operating temperatures are expected to exceed 600° F, carbon content becomes critical. The lower carbon content of Nickel 201 makes the material resistant to graphitization and therefore less subject to embrittlement. Nickel 200 & 201 are approved for construction of pressure vessels and components under ASME Boiler and Pressure Vessel Code Section VIII, Division 1. Nickel 200 is approved for service up to 600° F while Nickel 201 is approved for service up to ° F. Melting point is -° F.

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ed i hear ya.....Bob Engnath got most of the twisted nickle stuff jim furgerson made (they was best of friends.jim good people) and ground it and sold it..back then there 15n20 was not known so we worked with what we had..for the most part 98% of the damascus i saw sold or collected would seldom ever get used...if nothing else it created a minunte gap you only could see under a micro scope..so it was like stacking hundreds of razor blades with a nickle spacer ..fyi:Bob Engnath probly ground over 30,000 knives..few know that.i seen him take blank steel and have a great katana in less than 30 mins..I do miss him alot stefaney also.thou i hear she in NY...wish i could find her..they did not come better than BOB ENGNATH...

fyi..i know im sorted of dating my old butt lol...after looseing over $300k in san diego i managed to save my tools and eqt...thou they was in storage and only the last year do they have a permanent home i own..im rusty as they say,,but most knoledge i have is still good but new ideas like 15n20 i like what i hear..with help from nice people like you and randy plus others ill get into it again.

when i was bladesmithing in s.cafif there was only a few that messed around with knives and they was ferriers.i was the only bladesmith in s.calif that i knew as jim hsisrioulas moved to NV...
i know you know burt gaston ..he was my anvil mate at abs school in 88....in i had tim hancock was in my damascus class with Bill Moran.lol..most of all i studied with that stuck with it are MS or top notch..i just manage to keep my feet wet when i could..hopefully soon ill get things rolling.

question in your opion what do you think of this nitrogen quenching i see being done for heat treating?

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