Hupcap question. Metallurgy? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72c20customcamper · 05-14-2019, 02:23 PM

I bought a set of 3/4 ton dog dish caps. Couple have hairline cracks around the edge no biggie I thought. I hit them with a magnet non magnetic . So first guess was Stainless that someone painted, got out the mushroom grinder and its gold in color. Second thought they possibly could be SS chrome caps that someone painted. But the copper color goes all the way through the metal. And I seriously doubt that they would have used copper. So it must be an alloy of some kind. Any thoughts?

I need to know what rod to get for the tig welder

**leddzepp** · 05-14-2019, 02:39 PM

They are brass, chrome is plated

72c20customcamper · 05-14-2019, 06:06 PM

Quote:

Originally Posted by leddzepp

They are brass, chrome is plated

Cool . I can use a rod for brass tiging it. Or just use gas and brazing rod

**jocko** · 05-14-2019, 07:50 PM

73-75 transitioned to stainless w/gold bow ties and are much less likely to crack at the edges. Can also be polished up nicely. But chrome caps are correct, and very hard to come by in good condition, for 69-72.

**special-K** · 05-14-2019, 08:15 PM

That is the standard for 60-72... chromed brass. But there are exceptions on both sides of the change over. Not that it applies to your case. Remember when brazing with gas was the only choice?

72c20customcamper · 05-15-2019, 09:19 AM

Tim we used to gas weld most everything. On some of the old cars we restored we used lead . My uncle never liked bondo.

weim55 · 05-15-2019, 12:37 PM

Reading between the lines here, are you people telling me the painted hubcaps for these trucks are made of brass??

Steve weim55 Colorado

72c20customcamper · 05-15-2019, 07:19 PM

Quote:

Originally Posted by weim55

Reading between the lines here, are you people telling me the painted hubcaps for these trucks are made of brass??

Steve weim55 Colorado

Yup

factorystock · 05-15-2019, 09:48 PM

Quote:

Originally Posted by weim55

Reading between the lines here, are you people telling me the painted hubcaps for these trucks are made of brass??

All '67-'71 'chrome" caps are actually chrome over brass ( notorious for cracking, splitting and denting easily ). '72 " chrome" was a transition year, some were chrome over brass, some got the new improved, and much more durable stainless steel.

factorystock · 01-23-2021, 11:19 PM

Visuals are great. Original chrome over brass. This is why they are rarely seen on '69-72 Chevy or GMC.

**DeadheadNM** · 01-24-2021, 12:37 AM

More discussion under this thread fwiw: https://www.67-72chevytrucks.com/vbo...d.php?t=796353

05-14-2019, 02:23 PM	#1
72c20customcamper Registered User Join Date: Jul 2018 Location: Catskill Mountains,NY Posts: 8,623	Hupcap question. Metallurgy? I bought a set of 3/4 ton dog dish caps. Couple have hairline cracks around the edge no biggie I thought. I hit them with a magnet non magnetic . So first guess was Stainless that someone painted, got out the mushroom grinder and its gold in color. Second thought they possibly could be SS chrome caps that someone painted. But the copper color goes all the way through the metal. And I seriously doubt that they would have used copper. So it must be an alloy of some kind. Any thoughts? I need to know what rod to get for the tig welder __________________ Mark 72 c20 custom camper Husky edition, 66 SS396 Chevelle 1964 Hawk, 63 Avanti,62 lark 1969 AMX , 1968 c20 stepside ,85 K20 1977 Suburban sold 68 anniversary.

05-14-2019, 02:39 PM	#2
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 20,017	Re: Hupcap question. Metallurgy? They are brass, chrome is plated __________________ 1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man RIP FleetsidePaul

05-14-2019, 07:50 PM	#4
jocko Senior Member Join Date: Oct 2009 Location: Godley, TX Posts: 17,976	Re: Hupcap question. Metallurgy? 73-75 transitioned to stainless w/gold bow ties and are much less likely to crack at the edges. Can also be polished up nicely. But chrome caps are correct, and very hard to come by in good condition, for 69-72.

05-14-2019, 08:15 PM	#5
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,852	Re: Hupcap question. Metallurgy? That is the standard for 60-72... chromed brass. But there are exceptions on both sides of the change over. Not that it applies to your case. Remember when brazing with gas was the only choice? __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

05-15-2019, 09:19 AM	#6
72c20customcamper Registered User Join Date: Jul 2018 Location: Catskill Mountains,NY Posts: 8,623	Re: Hupcap question. Metallurgy? Tim we used to gas weld most everything. On some of the old cars we restored we used lead . My uncle never liked bondo. __________________ Mark 72 c20 custom camper Husky edition, 66 SS396 Chevelle 1964 Hawk, 63 Avanti,62 lark 1969 AMX , 1968 c20 stepside ,85 K20 1977 Suburban sold 68 anniversary.

05-15-2019, 12:37 PM	#7
weim55 Registered User Join Date: Jan 2017 Location: Larkspur, Colorado Posts: 916	Re: Hupcap question. Metallurgy? Reading between the lines here, are you people telling me the painted hubcaps for these trucks are made of brass?? Steve weim55 Colorado

01-23-2021, 11:19 PM	#10
factorystock Registered User Join Date: Feb 2007 Location: west coast Posts: 3,380	Re: Hupcap question. Metallurgy? Visuals are great. Original chrome over brass. This is why they are rarely seen on '69-72 Chevy or GMC. Attached Images

01-24-2021, 12:37 AM	#11
DeadheadNM Carpe manana Join Date: Dec 2010 Location: Eau Claire, WI Posts: 12,422	Re: Hupcap question. Metallurgy? More discussion under this thread fwiw: https://www.67-72chevytrucks.com/vbo...d.php?t=796353 __________________ 1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 Members met: ORANGBLAZ, 2003 silverado, MikeCofield, BB72CHEVKT, Duncan&Son, Sameyrasmea72, THENEWMEXICAN, HotRod C/10, brianthelion02, Sport/Truck, ryanroo, michael bustamante, Dirt's72, Already Gone, WestButteTruck, 57taskforce, Moreyel, painterljp, AASmedic, SoCoC10, Lumaestas, carbuff382, Chevyland



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